diff --git a/.php_cs.dist b/.php_cs.dist
index 2731440d1933..7138413855ef 100644
--- a/.php_cs.dist
+++ b/.php_cs.dist
@@ -15,6 +15,10 @@ return PhpCsFixer\Config::create()
         // rule disabled due to https://bugs.php.net/bug.php?id=60573 bug;
         // to be re-enabled (by dropping next line, rule is part of @Symfony already) on branch that requires PHP 5.4+
         'self_accessor' => false,
+        // TODO remove the disabling once https://github.com/FriendsOfPHP/PHP-CS-Fixer/pull/3876 is merged and released
+        'native_constant_invocation' => false,
+        // Part of @Symfony:risky in PHP-CS-Fixer 2.13.0. To be removed from the config file once upgrading
+        'native_function_invocation' => array('include' => array('@compiler_optimized'), 'scope' => 'namespaced'),
     ))
     ->setRiskyAllowed(true)
     ->setFinder(
@@ -32,7 +36,11 @@ return PhpCsFixer\Config::create()
                 'Symfony/Component/VarDumper/Tests/Fixtures',
                 // resource templates
                 'Symfony/Bundle/FrameworkBundle/Resources/views/Form',
+                // explicit trigger_error tests
+                'Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/',
             ))
+            // Support for older PHPunit version
+            ->notPath('Symfony/Bridge/PhpUnit/SymfonyTestsListener.php')
             // file content autogenerated by `var_export`
             ->notPath('Symfony/Component/Translation/Tests/fixtures/resources.php')
             // test template
@@ -40,8 +48,6 @@ return PhpCsFixer\Config::create()
             // explicit heredoc test
             ->notPath('Symfony/Bundle/FrameworkBundle/Tests/Fixtures/Resources/views/translation.html.php')
             // explicit trigger_error tests
-            ->notPath('Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/default.phpt')
-            ->notPath('Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/weak.phpt')
             ->notPath('Symfony/Component/Debug/Tests/DebugClassLoaderTest.php')
     )
 ;
diff --git a/src/Symfony/Bridge/Doctrine/ContainerAwareEventManager.php b/src/Symfony/Bridge/Doctrine/ContainerAwareEventManager.php
index 895ade5fe740..baa99fac5d3d 100644
--- a/src/Symfony/Bridge/Doctrine/ContainerAwareEventManager.php
+++ b/src/Symfony/Bridge/Doctrine/ContainerAwareEventManager.php
@@ -54,7 +54,7 @@ public function dispatchEvent($eventName, EventArgs $eventArgs = null)
             $initialized = isset($this->initialized[$eventName]);
 
             foreach ($this->listeners[$eventName] as $hash => $listener) {
-                if (!$initialized && is_string($listener)) {
+                if (!$initialized && \is_string($listener)) {
                     $this->listeners[$eventName][$hash] = $listener = $this->container->get($listener);
                 }
 
@@ -98,7 +98,7 @@ public function hasListeners($event)
      */
     public function addEventListener($events, $listener)
     {
-        if (is_string($listener)) {
+        if (\is_string($listener)) {
             if ($this->initialized) {
                 throw new \RuntimeException('Adding lazy-loading listeners after construction is not supported.');
             }
@@ -124,7 +124,7 @@ public function addEventListener($events, $listener)
      */
     public function removeEventListener($events, $listener)
     {
-        if (is_string($listener)) {
+        if (\is_string($listener)) {
             $hash = '_service_'.$listener;
         } else {
             // Picks the hash code related to that listener
diff --git a/src/Symfony/Bridge/Doctrine/DataCollector/DoctrineDataCollector.php b/src/Symfony/Bridge/Doctrine/DataCollector/DoctrineDataCollector.php
index a57b9ae6ea15..2580c1b88dc9 100644
--- a/src/Symfony/Bridge/Doctrine/DataCollector/DoctrineDataCollector.php
+++ b/src/Symfony/Bridge/Doctrine/DataCollector/DoctrineDataCollector.php
@@ -120,14 +120,14 @@ private function sanitizeQuery($connectionName, $query)
         if (null === $query['params']) {
             $query['params'] = array();
         }
-        if (!is_array($query['params'])) {
+        if (!\is_array($query['params'])) {
             $query['params'] = array($query['params']);
         }
         foreach ($query['params'] as $j => $param) {
             if (isset($query['types'][$j])) {
                 // Transform the param according to the type
                 $type = $query['types'][$j];
-                if (is_string($type)) {
+                if (\is_string($type)) {
                     $type = Type::getType($type);
                 }
                 if ($type instanceof Type) {
@@ -158,11 +158,11 @@ private function sanitizeQuery($connectionName, $query)
      */
     private function sanitizeParam($var)
     {
-        if (is_object($var)) {
-            return array(sprintf('Object(%s)', get_class($var)), false);
+        if (\is_object($var)) {
+            return array(sprintf('Object(%s)', \get_class($var)), false);
         }
 
-        if (is_array($var)) {
+        if (\is_array($var)) {
             $a = array();
             $original = true;
             foreach ($var as $k => $v) {
@@ -174,7 +174,7 @@ private function sanitizeParam($var)
             return array($a, $original);
         }
 
-        if (is_resource($var)) {
+        if (\is_resource($var)) {
             return array(sprintf('Resource(%s)', get_resource_type($var)), false);
         }
 
diff --git a/src/Symfony/Bridge/Doctrine/DependencyInjection/AbstractDoctrineExtension.php b/src/Symfony/Bridge/Doctrine/DependencyInjection/AbstractDoctrineExtension.php
index 8426d307da5d..ac79c576afea 100644
--- a/src/Symfony/Bridge/Doctrine/DependencyInjection/AbstractDoctrineExtension.php
+++ b/src/Symfony/Bridge/Doctrine/DependencyInjection/AbstractDoctrineExtension.php
@@ -142,7 +142,7 @@ protected function setMappingDriverConfig(array $mappingConfig, $mappingName)
      */
     protected function getMappingDriverBundleConfigDefaults(array $bundleConfig, \ReflectionClass $bundle, ContainerBuilder $container)
     {
-        $bundleDir = dirname($bundle->getFileName());
+        $bundleDir = \dirname($bundle->getFileName());
 
         if (!$bundleConfig['type']) {
             $bundleConfig['type'] = $this->detectMetadataDriver($bundleDir, $container);
@@ -154,7 +154,7 @@ protected function getMappingDriverBundleConfigDefaults(array $bundleConfig, \Re
         }
 
         if (!$bundleConfig['dir']) {
-            if (in_array($bundleConfig['type'], array('annotation', 'staticphp'))) {
+            if (\in_array($bundleConfig['type'], array('annotation', 'staticphp'))) {
                 $bundleConfig['dir'] = $bundleDir.'/'.$this->getMappingObjectDefaultName();
             } else {
                 $bundleConfig['dir'] = $bundleDir.'/'.$this->getMappingResourceConfigDirectory();
@@ -241,7 +241,7 @@ protected function assertValidMappingConfiguration(array $mappingConfig, $object
             throw new \InvalidArgumentException(sprintf('Specified non-existing directory "%s" as Doctrine mapping source.', $mappingConfig['dir']));
         }
 
-        if (!in_array($mappingConfig['type'], array('xml', 'yml', 'annotation', 'php', 'staticphp'))) {
+        if (!\in_array($mappingConfig['type'], array('xml', 'yml', 'annotation', 'php', 'staticphp'))) {
             throw new \InvalidArgumentException(sprintf('Can only configure "xml", "yml", "annotation", "php" or '.
                 '"staticphp" through the DoctrineBundle. Use your own bundle to configure other metadata drivers. '.
                 'You can register them by adding a new driver to the '.
@@ -264,17 +264,17 @@ protected function detectMetadataDriver($dir, ContainerBuilder $container)
         $configPath = $this->getMappingResourceConfigDirectory();
         $resource = $dir.'/'.$configPath;
         while (!is_dir($resource)) {
-            $resource = dirname($resource);
+            $resource = \dirname($resource);
         }
 
         $container->addResource(new FileResource($resource));
 
         $extension = $this->getMappingResourceExtension();
-        if (($files = glob($dir.'/'.$configPath.'/*.'.$extension.'.xml')) && count($files)) {
+        if (($files = glob($dir.'/'.$configPath.'/*.'.$extension.'.xml')) && \count($files)) {
             return 'xml';
-        } elseif (($files = glob($dir.'/'.$configPath.'/*.'.$extension.'.yml')) && count($files)) {
+        } elseif (($files = glob($dir.'/'.$configPath.'/*.'.$extension.'.yml')) && \count($files)) {
             return 'yml';
-        } elseif (($files = glob($dir.'/'.$configPath.'/*.'.$extension.'.php')) && count($files)) {
+        } elseif (($files = glob($dir.'/'.$configPath.'/*.'.$extension.'.php')) && \count($files)) {
             return 'php';
         }
 
diff --git a/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/DoctrineValidationPass.php b/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/DoctrineValidationPass.php
index 82c1b7c81138..4b030955a98f 100644
--- a/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/DoctrineValidationPass.php
+++ b/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/DoctrineValidationPass.php
@@ -60,7 +60,7 @@ private function updateValidatorMappingFiles(ContainerBuilder $container, $mappi
 
         foreach ($container->getParameter('kernel.bundles') as $bundle) {
             $reflection = new \ReflectionClass($bundle);
-            if (is_file($file = dirname($reflection->getFileName()).'/'.$validationPath)) {
+            if (is_file($file = \dirname($reflection->getFileName()).'/'.$validationPath)) {
                 $files[] = $file;
                 $container->addResource(new FileResource($file));
             }
diff --git a/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPass.php b/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPass.php
index f7d513a14e09..2ba7747e3881 100644
--- a/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPass.php
+++ b/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPass.php
@@ -153,7 +153,7 @@ private function findAndSortTags($tagName, ContainerBuilder $container)
 
         if ($sortedTags) {
             krsort($sortedTags);
-            $sortedTags = call_user_func_array('array_merge', $sortedTags);
+            $sortedTags = \call_user_func_array('array_merge', $sortedTags);
         }
 
         return $sortedTags;
diff --git a/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterMappingsPass.php b/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterMappingsPass.php
index 6ec2407d9073..ac3a55e481d9 100644
--- a/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterMappingsPass.php
+++ b/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterMappingsPass.php
@@ -124,7 +124,7 @@ public function __construct($driver, array $namespaces, array $managerParameters
         $this->managerParameters = $managerParameters;
         $this->driverPattern = $driverPattern;
         $this->enabledParameter = $enabledParameter;
-        if (count($aliasMap) && (!$configurationPattern || !$registerAliasMethodName)) {
+        if (\count($aliasMap) && (!$configurationPattern || !$registerAliasMethodName)) {
             throw new \InvalidArgumentException('configurationPattern and registerAliasMethodName are required to register namespace alias');
         }
         $this->configurationPattern = $configurationPattern;
@@ -149,7 +149,7 @@ public function process(ContainerBuilder $container)
             $chainDriverDef->addMethodCall('addDriver', array($mappingDriverDef, $namespace));
         }
 
-        if (!count($this->aliasMap)) {
+        if (!\count($this->aliasMap)) {
             return;
         }
 
diff --git a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/DoctrineChoiceLoader.php b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/DoctrineChoiceLoader.php
index bf5890c1e69f..43120c625857 100644
--- a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/DoctrineChoiceLoader.php
+++ b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/DoctrineChoiceLoader.php
@@ -88,7 +88,7 @@ public function loadValuesForChoices(array $choices, $value = null)
 
         // Optimize performance for single-field identifiers. We already
         // know that the IDs are used as values
-        $optimize = null === $value || is_array($value) && $value[0] === $this->idReader;
+        $optimize = null === $value || \is_array($value) && $value[0] === $this->idReader;
 
         // Attention: This optimization does not check choices for existence
         if ($optimize && !$this->choiceList && $this->idReader->isSingleId()) {
@@ -125,7 +125,7 @@ public function loadChoicesForValues(array $values, $value = null)
 
         // Optimize performance in case we have an object loader and
         // a single-field identifier
-        $optimize = null === $value || is_array($value) && $value[0] === $this->idReader;
+        $optimize = null === $value || \is_array($value) && $value[0] === $this->idReader;
 
         if ($optimize && !$this->choiceList && $this->objectLoader && $this->idReader->isSingleId()) {
             $unorderedObjects = $this->objectLoader->getEntitiesByIds($this->idReader->getIdField(), $values);
diff --git a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/EntityChoiceList.php b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/EntityChoiceList.php
index 2c226f50a0ad..b196e8918344 100644
--- a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/EntityChoiceList.php
+++ b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/EntityChoiceList.php
@@ -117,7 +117,7 @@ public function __construct(ObjectManager $manager, $class, $labelPath = null, E
         $this->entityLoader = $entityLoader;
         $this->classMetadata = $manager->getClassMetadata($class);
         $this->class = $this->classMetadata->getName();
-        $this->loaded = is_array($entities) || $entities instanceof \Traversable;
+        $this->loaded = \is_array($entities) || $entities instanceof \Traversable;
         $this->preferredEntities = $preferredEntities;
         list(
             $this->idAsIndex,
@@ -449,13 +449,13 @@ private function getIdentifierInfoForClass(ClassMetadata $classMetadata)
 
         $identifiers = $classMetadata->getIdentifierFieldNames();
 
-        if (1 === count($identifiers)) {
+        if (1 === \count($identifiers)) {
             $identifier = $identifiers[0];
 
             if (!$classMetadata->hasAssociation($identifier)) {
                 $idAsValue = true;
 
-                if (in_array($classMetadata->getTypeOfField($identifier), array('integer', 'smallint', 'bigint'))) {
+                if (\in_array($classMetadata->getTypeOfField($identifier), array('integer', 'smallint', 'bigint'))) {
                     $idAsIndex = true;
                 }
             }
diff --git a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/IdReader.php b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/IdReader.php
index 1d881849267d..9c632330354b 100644
--- a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/IdReader.php
+++ b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/IdReader.php
@@ -42,8 +42,8 @@ public function __construct(ObjectManager $om, ClassMetadata $classMetadata)
 
         $this->om = $om;
         $this->classMetadata = $classMetadata;
-        $this->singleId = 1 === count($ids);
-        $this->intId = $this->singleId && in_array($idType, array('integer', 'smallint', 'bigint'));
+        $this->singleId = 1 === \count($ids);
+        $this->intId = $this->singleId && \in_array($idType, array('integer', 'smallint', 'bigint'));
         $this->idField = current($ids);
 
         // single field association are resolved, since the schema column could be an int
@@ -95,7 +95,7 @@ public function getIdValue($object)
         }
 
         if (!$this->om->contains($object)) {
-            throw new RuntimeException(sprintf('Entity of type "%s" passed to the choice field must be managed. Maybe you forget to persist it in the entity manager?', get_class($object)));
+            throw new RuntimeException(sprintf('Entity of type "%s" passed to the choice field must be managed. Maybe you forget to persist it in the entity manager?', \get_class($object)));
         }
 
         $this->om->initializeObject($object);
diff --git a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/ORMQueryBuilderLoader.php b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/ORMQueryBuilderLoader.php
index c9a02fb38d76..0a0de20c573c 100644
--- a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/ORMQueryBuilderLoader.php
+++ b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/ORMQueryBuilderLoader.php
@@ -98,7 +98,7 @@ public function getEntitiesByIds($identifier, array $values)
         // Guess type
         $entity = current($qb->getRootEntities());
         $metadata = $qb->getEntityManager()->getClassMetadata($entity);
-        if (in_array($metadata->getTypeOfField($identifier), array('integer', 'bigint', 'smallint'))) {
+        if (\in_array($metadata->getTypeOfField($identifier), array('integer', 'bigint', 'smallint'))) {
             $parameterType = Connection::PARAM_INT_ARRAY;
 
             // Filter out non-integer values (e.g. ""). If we don't, some
@@ -106,7 +106,7 @@ public function getEntitiesByIds($identifier, array $values)
             $values = array_values(array_filter($values, function ($v) {
                 return (string) $v === (string) (int) $v || ctype_digit($v);
             }));
-        } elseif (in_array($metadata->getTypeOfField($identifier), array('uuid', 'guid'))) {
+        } elseif (\in_array($metadata->getTypeOfField($identifier), array('uuid', 'guid'))) {
             $parameterType = Connection::PARAM_STR_ARRAY;
 
             // Like above, but we just filter out empty strings.
diff --git a/src/Symfony/Bridge/Doctrine/Form/DataTransformer/CollectionToArrayTransformer.php b/src/Symfony/Bridge/Doctrine/Form/DataTransformer/CollectionToArrayTransformer.php
index 307361a52a3e..63c8f2439b9a 100644
--- a/src/Symfony/Bridge/Doctrine/Form/DataTransformer/CollectionToArrayTransformer.php
+++ b/src/Symfony/Bridge/Doctrine/Form/DataTransformer/CollectionToArrayTransformer.php
@@ -36,7 +36,7 @@ public function transform($collection)
 
         // For cases when the collection getter returns $collection->toArray()
         // in order to prevent modifications of the returned collection
-        if (is_array($collection)) {
+        if (\is_array($collection)) {
             return $collection;
         }
 
diff --git a/src/Symfony/Bridge/Doctrine/Form/DoctrineOrmTypeGuesser.php b/src/Symfony/Bridge/Doctrine/Form/DoctrineOrmTypeGuesser.php
index 645e2fda4cc6..a1b614944e2f 100644
--- a/src/Symfony/Bridge/Doctrine/Form/DoctrineOrmTypeGuesser.php
+++ b/src/Symfony/Bridge/Doctrine/Form/DoctrineOrmTypeGuesser.php
@@ -131,7 +131,7 @@ public function guessMaxLength($class, $property)
                 return new ValueGuess($mapping['length'], Guess::HIGH_CONFIDENCE);
             }
 
-            if (in_array($ret[0]->getTypeOfField($property), array(Type::DECIMAL, Type::FLOAT))) {
+            if (\in_array($ret[0]->getTypeOfField($property), array(Type::DECIMAL, Type::FLOAT))) {
                 return new ValueGuess(null, Guess::MEDIUM_CONFIDENCE);
             }
         }
@@ -144,7 +144,7 @@ public function guessPattern($class, $property)
     {
         $ret = $this->getMetadata($class);
         if ($ret && isset($ret[0]->fieldMappings[$property]) && !$ret[0]->hasAssociation($property)) {
-            if (in_array($ret[0]->getTypeOfField($property), array(Type::DECIMAL, Type::FLOAT))) {
+            if (\in_array($ret[0]->getTypeOfField($property), array(Type::DECIMAL, Type::FLOAT))) {
                 return new ValueGuess(null, Guess::MEDIUM_CONFIDENCE);
             }
         }
diff --git a/src/Symfony/Bridge/Doctrine/Form/EventListener/MergeDoctrineCollectionListener.php b/src/Symfony/Bridge/Doctrine/Form/EventListener/MergeDoctrineCollectionListener.php
index bb4cfa5087c4..8f96f3677c8b 100644
--- a/src/Symfony/Bridge/Doctrine/Form/EventListener/MergeDoctrineCollectionListener.php
+++ b/src/Symfony/Bridge/Doctrine/Form/EventListener/MergeDoctrineCollectionListener.php
@@ -41,7 +41,7 @@ public function onBind(FormEvent $event)
 
         // If all items were removed, call clear which has a higher
         // performance on persistent collections
-        if ($collection instanceof Collection && 0 === count($data)) {
+        if ($collection instanceof Collection && 0 === \count($data)) {
             $collection->clear();
         }
     }
diff --git a/src/Symfony/Bridge/Doctrine/Form/Type/DoctrineType.php b/src/Symfony/Bridge/Doctrine/Form/Type/DoctrineType.php
index 2acf7176f1ea..f76872a5818c 100644
--- a/src/Symfony/Bridge/Doctrine/Form/Type/DoctrineType.php
+++ b/src/Symfony/Bridge/Doctrine/Form/Type/DoctrineType.php
@@ -259,8 +259,8 @@ public function configureOptions(OptionsResolver $resolver)
         // Invoke the query builder closure so that we can cache choice lists
         // for equal query builders
         $queryBuilderNormalizer = function (Options $options, $queryBuilder) {
-            if (is_callable($queryBuilder)) {
-                $queryBuilder = call_user_func($queryBuilder, $options['em']->getRepository($options['class']));
+            if (\is_callable($queryBuilder)) {
+                $queryBuilder = \call_user_func($queryBuilder, $options['em']->getRepository($options['class']));
             }
 
             return $queryBuilder;
diff --git a/src/Symfony/Bridge/Doctrine/Form/Type/EntityType.php b/src/Symfony/Bridge/Doctrine/Form/Type/EntityType.php
index 7ec1ea3d4334..99ce535e23c0 100644
--- a/src/Symfony/Bridge/Doctrine/Form/Type/EntityType.php
+++ b/src/Symfony/Bridge/Doctrine/Form/Type/EntityType.php
@@ -28,8 +28,8 @@ public function configureOptions(OptionsResolver $resolver)
         // Invoke the query builder closure so that we can cache choice lists
         // for equal query builders
         $queryBuilderNormalizer = function (Options $options, $queryBuilder) {
-            if (is_callable($queryBuilder)) {
-                $queryBuilder = call_user_func($queryBuilder, $options['em']->getRepository($options['class']));
+            if (\is_callable($queryBuilder)) {
+                $queryBuilder = \call_user_func($queryBuilder, $options['em']->getRepository($options['class']));
 
                 if (null !== $queryBuilder && !$queryBuilder instanceof QueryBuilder) {
                     throw new UnexpectedTypeException($queryBuilder, 'Doctrine\ORM\QueryBuilder');
diff --git a/src/Symfony/Bridge/Doctrine/Logger/DbalLogger.php b/src/Symfony/Bridge/Doctrine/Logger/DbalLogger.php
index 42574edcade5..9099fe06765d 100644
--- a/src/Symfony/Bridge/Doctrine/Logger/DbalLogger.php
+++ b/src/Symfony/Bridge/Doctrine/Logger/DbalLogger.php
@@ -71,12 +71,12 @@ private function normalizeParams(array $params)
     {
         foreach ($params as $index => $param) {
             // normalize recursively
-            if (is_array($param)) {
+            if (\is_array($param)) {
                 $params[$index] = $this->normalizeParams($param);
                 continue;
             }
 
-            if (!is_string($params[$index])) {
+            if (!\is_string($params[$index])) {
                 continue;
             }
 
diff --git a/src/Symfony/Bridge/Doctrine/Security/User/EntityUserProvider.php b/src/Symfony/Bridge/Doctrine/Security/User/EntityUserProvider.php
index 7356ff2998cf..18d3e690a72b 100644
--- a/src/Symfony/Bridge/Doctrine/Security/User/EntityUserProvider.php
+++ b/src/Symfony/Bridge/Doctrine/Security/User/EntityUserProvider.php
@@ -52,7 +52,7 @@ public function loadUserByUsername($username)
         } else {
             if (!$repository instanceof UserLoaderInterface) {
                 if (!$repository instanceof UserProviderInterface) {
-                    throw new \InvalidArgumentException(sprintf('You must either make the "%s" entity Doctrine Repository ("%s") implement "Symfony\Bridge\Doctrine\Security\User\UserLoaderInterface" or set the "property" option in the corresponding entity provider configuration.', $this->classOrAlias, get_class($repository)));
+                    throw new \InvalidArgumentException(sprintf('You must either make the "%s" entity Doctrine Repository ("%s") implement "Symfony\Bridge\Doctrine\Security\User\UserLoaderInterface" or set the "property" option in the corresponding entity provider configuration.', $this->classOrAlias, \get_class($repository)));
                 }
 
                 @trigger_error('Implementing Symfony\Component\Security\Core\User\UserProviderInterface in a Doctrine repository when using the entity provider is deprecated since Symfony 2.8 and will not be supported in 3.0. Make the repository implement Symfony\Bridge\Doctrine\Security\User\UserLoaderInterface instead.', E_USER_DEPRECATED);
@@ -75,7 +75,7 @@ public function refreshUser(UserInterface $user)
     {
         $class = $this->getClass();
         if (!$user instanceof $class) {
-            throw new UnsupportedUserException(sprintf('Instances of "%s" are not supported.', get_class($user)));
+            throw new UnsupportedUserException(sprintf('Instances of "%s" are not supported.', \get_class($user)));
         }
 
         $repository = $this->getRepository();
diff --git a/src/Symfony/Bridge/Doctrine/Test/DoctrineTestHelper.php b/src/Symfony/Bridge/Doctrine/Test/DoctrineTestHelper.php
index 1a97922b05f8..9fa7c777a533 100644
--- a/src/Symfony/Bridge/Doctrine/Test/DoctrineTestHelper.php
+++ b/src/Symfony/Bridge/Doctrine/Test/DoctrineTestHelper.php
@@ -30,7 +30,7 @@ class DoctrineTestHelper
      */
     public static function createTestEntityManager()
     {
-        if (!extension_loaded('pdo_sqlite')) {
+        if (!\extension_loaded('pdo_sqlite')) {
             TestCase::markTestSkipped('Extension pdo_sqlite is required.');
         }
 
diff --git a/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/DoctrineExtensionTest.php b/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/DoctrineExtensionTest.php
index 0a9dae3b200f..63109fab99e2 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/DoctrineExtensionTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/DoctrineExtensionTest.php
@@ -68,7 +68,7 @@ public function testFixManagersAutoMappingsWithTwoAutomappings()
             'SecondBundle' => 'My\SecondBundle',
         );
 
-        $reflection = new \ReflectionClass(get_class($this->extension));
+        $reflection = new \ReflectionClass(\get_class($this->extension));
         $method = $reflection->getMethod('fixManagersAutoMappings');
         $method->setAccessible(true);
 
@@ -157,7 +157,7 @@ public function testFixManagersAutoMappings(array $originalEm1, array $originalE
             'SecondBundle' => 'My\SecondBundle',
         );
 
-        $reflection = new \ReflectionClass(get_class($this->extension));
+        $reflection = new \ReflectionClass(\get_class($this->extension));
         $method = $reflection->getMethod('fixManagersAutoMappings');
         $method->setAccessible(true);
 
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypePerformanceTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypePerformanceTest.php
index ac96ea21c531..048747c93794 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypePerformanceTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypePerformanceTest.php
@@ -72,7 +72,7 @@ protected function setUp()
         $ids = range(1, 300);
 
         foreach ($ids as $id) {
-            $name = 65 + (int) chr($id % 57);
+            $name = 65 + (int) \chr($id % 57);
             $this->em->persist(new SingleIntIdEntity($id, $name));
         }
 
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php b/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php
index 1e3e6ca6ec80..38bbed12945f 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php
@@ -145,7 +145,7 @@ public function testLogUTF8LongString()
         ;
 
         $testStringArray = array('é', 'á', 'ű', 'ő', 'ú', 'ö', 'ü', 'ó', 'í');
-        $testStringCount = count($testStringArray);
+        $testStringCount = \count($testStringArray);
 
         $shortString = '';
         $longString = '';
diff --git a/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/Fixtures/DoctrineFooType.php b/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/Fixtures/DoctrineFooType.php
index 394eaebdefc6..8d0a9381143d 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/Fixtures/DoctrineFooType.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/Fixtures/DoctrineFooType.php
@@ -50,7 +50,7 @@ public function convertToDatabaseValue($value, AbstractPlatform $platform)
             return;
         }
         if (!$value instanceof Foo) {
-            throw new ConversionException(sprintf('Expected %s, got %s', 'Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\Foo', gettype($value)));
+            throw new ConversionException(sprintf('Expected %s, got %s', 'Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\Foo', \gettype($value)));
         }
 
         return $foo->bar;
@@ -64,7 +64,7 @@ public function convertToPHPValue($value, AbstractPlatform $platform)
         if (null === $value) {
             return;
         }
-        if (!is_string($value)) {
+        if (!\is_string($value)) {
             throw ConversionException::conversionFailed($value, self::NAME);
         }
 
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Security/User/EntityUserProviderTest.php b/src/Symfony/Bridge/Doctrine/Tests/Security/User/EntityUserProviderTest.php
index 299138cf795d..7779acaa801c 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Security/User/EntityUserProviderTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Security/User/EntityUserProviderTest.php
@@ -176,7 +176,7 @@ public function testSupportProxy()
         $provider = new EntityUserProvider($this->getManager($em), 'Symfony\Bridge\Doctrine\Tests\Fixtures\User', 'name');
 
         $user2 = $em->getReference('Symfony\Bridge\Doctrine\Tests\Fixtures\User', array('id1' => 1, 'id2' => 1));
-        $this->assertTrue($provider->supportsClass(get_class($user2)));
+        $this->assertTrue($provider->supportsClass(\get_class($user2)));
     }
 
     public function testLoadUserByUserNameShouldLoadUserWhenProperInterfaceProvided()
diff --git a/src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntityValidator.php b/src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntityValidator.php
index f000cae75ebe..cb0879613161 100644
--- a/src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntityValidator.php
+++ b/src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntityValidator.php
@@ -45,17 +45,17 @@ public function validate($entity, Constraint $constraint)
             throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\UniqueEntity');
         }
 
-        if (!is_array($constraint->fields) && !is_string($constraint->fields)) {
+        if (!\is_array($constraint->fields) && !\is_string($constraint->fields)) {
             throw new UnexpectedTypeException($constraint->fields, 'array');
         }
 
-        if (null !== $constraint->errorPath && !is_string($constraint->errorPath)) {
+        if (null !== $constraint->errorPath && !\is_string($constraint->errorPath)) {
             throw new UnexpectedTypeException($constraint->errorPath, 'string or null');
         }
 
         $fields = (array) $constraint->fields;
 
-        if (0 === count($fields)) {
+        if (0 === \count($fields)) {
             throw new ConstraintDefinitionException('At least one field has to be specified.');
         }
 
@@ -70,14 +70,14 @@ public function validate($entity, Constraint $constraint)
                 throw new ConstraintDefinitionException(sprintf('Object manager "%s" does not exist.', $constraint->em));
             }
         } else {
-            $em = $this->registry->getManagerForClass(get_class($entity));
+            $em = $this->registry->getManagerForClass(\get_class($entity));
 
             if (!$em) {
-                throw new ConstraintDefinitionException(sprintf('Unable to find the object manager associated with an entity of class "%s".', get_class($entity)));
+                throw new ConstraintDefinitionException(sprintf('Unable to find the object manager associated with an entity of class "%s".', \get_class($entity)));
             }
         }
 
-        $class = $em->getClassMetadata(get_class($entity));
+        $class = $em->getClassMetadata(\get_class($entity));
         /* @var $class \Doctrine\Common\Persistence\Mapping\ClassMetadata */
 
         $criteria = array();
@@ -120,7 +120,7 @@ public function validate($entity, Constraint $constraint)
             return;
         }
 
-        $repository = $em->getRepository(get_class($entity));
+        $repository = $em->getRepository(\get_class($entity));
         $result = $repository->{$constraint->repositoryMethod}($criteria);
 
         if ($result instanceof \IteratorAggregate) {
diff --git a/src/Symfony/Bridge/Doctrine/Validator/DoctrineInitializer.php b/src/Symfony/Bridge/Doctrine/Validator/DoctrineInitializer.php
index 42cafdd12947..010c051581e7 100644
--- a/src/Symfony/Bridge/Doctrine/Validator/DoctrineInitializer.php
+++ b/src/Symfony/Bridge/Doctrine/Validator/DoctrineInitializer.php
@@ -30,7 +30,7 @@ public function __construct(ManagerRegistry $registry)
 
     public function initialize($object)
     {
-        $manager = $this->registry->getManagerForClass(get_class($object));
+        $manager = $this->registry->getManagerForClass(\get_class($object));
         if (null !== $manager) {
             $manager->initializeObject($object);
         }
diff --git a/src/Symfony/Bridge/Monolog/Handler/DebugHandler.php b/src/Symfony/Bridge/Monolog/Handler/DebugHandler.php
index f1046c96a6ad..4c124709eaec 100644
--- a/src/Symfony/Bridge/Monolog/Handler/DebugHandler.php
+++ b/src/Symfony/Bridge/Monolog/Handler/DebugHandler.php
@@ -51,7 +51,7 @@ public function countErrors()
         $levels = array(Logger::ERROR, Logger::CRITICAL, Logger::ALERT, Logger::EMERGENCY);
         foreach ($levels as $level) {
             if (isset($this->recordsByLevel[$level])) {
-                $cnt += count($this->recordsByLevel[$level]);
+                $cnt += \count($this->recordsByLevel[$level]);
             }
         }
 
diff --git a/src/Symfony/Bridge/PhpUnit/ClockMock.php b/src/Symfony/Bridge/PhpUnit/ClockMock.php
index 8bfb9a621118..5cd3531d6b67 100644
--- a/src/Symfony/Bridge/PhpUnit/ClockMock.php
+++ b/src/Symfony/Bridge/PhpUnit/ClockMock.php
@@ -71,7 +71,7 @@ public static function microtime($asFloat = false)
 
     public static function register($class)
     {
-        $self = get_called_class();
+        $self = \get_called_class();
 
         $mockedNs = array(substr($class, 0, strrpos($class, '\\')));
         if (strpos($class, '\\Tests\\')) {
@@ -79,7 +79,7 @@ public static function register($class)
             $mockedNs[] = substr($ns, 0, strrpos($ns, '\\'));
         }
         foreach ($mockedNs as $ns) {
-            if (function_exists($ns.'\time')) {
+            if (\function_exists($ns.'\time')) {
                 continue;
             }
             eval(<<<EOPHP
diff --git a/src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php b/src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php
index d1440bb1465a..aff7c5b96de9 100644
--- a/src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php
+++ b/src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php
@@ -75,13 +75,13 @@ public static function register($mode = 0)
             $trace = debug_backtrace(true);
             $group = 'other';
 
-            $i = count($trace);
+            $i = \count($trace);
             while (1 < $i && (!isset($trace[--$i]['class']) || ('ReflectionMethod' === $trace[$i]['class'] || 0 === strpos($trace[$i]['class'], 'PHPUnit_')))) {
                 // No-op
             }
 
             if (isset($trace[$i]['object']) || isset($trace[$i]['class'])) {
-                $class = isset($trace[$i]['object']) ? get_class($trace[$i]['object']) : $trace[$i]['class'];
+                $class = isset($trace[$i]['object']) ? \get_class($trace[$i]['object']) : $trace[$i]['class'];
                 $method = $trace[$i]['function'];
 
                 if (0 !== error_reporting()) {
@@ -90,7 +90,7 @@ public static function register($mode = 0)
                     || 0 === strpos($method, 'provideLegacy')
                     || 0 === strpos($method, 'getLegacy')
                     || strpos($class, '\Legacy')
-                    || in_array('legacy', \PHPUnit_Util_Test::getGroups($class, $method), true)
+                    || \in_array('legacy', \PHPUnit_Util_Test::getGroups($class, $method), true)
                 ) {
                     $group = 'legacy';
                 } else {
@@ -101,7 +101,7 @@ public static function register($mode = 0)
                     $e = new \Exception($msg);
                     $r = new \ReflectionProperty($e, 'trace');
                     $r->setAccessible(true);
-                    $r->setValue($e, array_slice($trace, 1, $i));
+                    $r->setValue($e, \array_slice($trace, 1, $i));
 
                     echo "\n".ucfirst($group).' deprecation triggered by '.$class.'::'.$method.':';
                     echo "\n".$msg;
@@ -193,12 +193,12 @@ public static function register($mode = 0)
 
                 // reset deprecations array
                 foreach ($deprecations as $group => $arrayOrInt) {
-                    $deprecations[$group] = is_int($arrayOrInt) ? 0 : array();
+                    $deprecations[$group] = \is_int($arrayOrInt) ? 0 : array();
                 }
 
                 register_shutdown_function(function () use (&$deprecations, $isFailing, $displayDeprecations, $mode) {
                     foreach ($deprecations as $group => $arrayOrInt) {
-                        if (0 < (is_int($arrayOrInt) ? $arrayOrInt : count($arrayOrInt))) {
+                        if (0 < (\is_int($arrayOrInt) ? $arrayOrInt : \count($arrayOrInt))) {
                             echo "Shutdown-time deprecations:\n";
                             break;
                         }
@@ -222,7 +222,7 @@ public static function register($mode = 0)
      */
     private static function hasColorSupport()
     {
-        if (!defined('STDOUT')) {
+        if (!\defined('STDOUT')) {
             return false;
         }
 
@@ -231,18 +231,18 @@ private static function hasColorSupport()
         }
 
         if (DIRECTORY_SEPARATOR === '\\') {
-            return (function_exists('sapi_windows_vt100_support')
+            return (\function_exists('sapi_windows_vt100_support')
                 && sapi_windows_vt100_support(STDOUT))
                 || false !== getenv('ANSICON')
                 || 'ON' === getenv('ConEmuANSI')
                 || 'xterm' === getenv('TERM');
         }
 
-        if (function_exists('stream_isatty')) {
+        if (\function_exists('stream_isatty')) {
             return stream_isatty(STDOUT);
         }
 
-        if (function_exists('posix_isatty')) {
+        if (\function_exists('posix_isatty')) {
             return posix_isatty(STDOUT);
         }
 
diff --git a/src/Symfony/Bridge/PhpUnit/TextUI/Command.php b/src/Symfony/Bridge/PhpUnit/TextUI/Command.php
index 7f218af9a39f..82d6ab32e03c 100644
--- a/src/Symfony/Bridge/PhpUnit/TextUI/Command.php
+++ b/src/Symfony/Bridge/PhpUnit/TextUI/Command.php
@@ -38,7 +38,7 @@ protected function handleBootstrap($filename)
         // By default, we want PHPUnit's autoloader before Symfony's one
         if (!getenv('SYMFONY_PHPUNIT_OVERLOAD')) {
             $filename = realpath(stream_resolve_include_path($filename));
-            $symfonyLoader = realpath(dirname(PHPUNIT_COMPOSER_INSTALL).'/../../../vendor/autoload.php');
+            $symfonyLoader = realpath(\dirname(PHPUNIT_COMPOSER_INSTALL).'/../../../vendor/autoload.php');
 
             if ($filename === $symfonyLoader) {
                 $symfonyLoader = require $symfonyLoader;
diff --git a/src/Symfony/Bridge/ProxyManager/LazyProxy/Instantiator/RuntimeInstantiator.php b/src/Symfony/Bridge/ProxyManager/LazyProxy/Instantiator/RuntimeInstantiator.php
index 33fc49e1012d..7d083a6981e2 100644
--- a/src/Symfony/Bridge/ProxyManager/LazyProxy/Instantiator/RuntimeInstantiator.php
+++ b/src/Symfony/Bridge/ProxyManager/LazyProxy/Instantiator/RuntimeInstantiator.php
@@ -51,7 +51,7 @@ public function instantiateProxy(ContainerInterface $container, Definition $defi
         return $this->factory->createProxy(
             $definition->getClass(),
             function (&$wrappedInstance, LazyLoadingInterface $proxy) use ($realInstantiator) {
-                $wrappedInstance = call_user_func($realInstantiator);
+                $wrappedInstance = \call_user_func($realInstantiator);
 
                 $proxy->setProxyInitializer(null);
 
diff --git a/src/Symfony/Bridge/ProxyManager/LazyProxy/PhpDumper/ProxyDumper.php b/src/Symfony/Bridge/ProxyManager/LazyProxy/PhpDumper/ProxyDumper.php
index e749ad40e074..662c274f783f 100644
--- a/src/Symfony/Bridge/ProxyManager/LazyProxy/PhpDumper/ProxyDumper.php
+++ b/src/Symfony/Bridge/ProxyManager/LazyProxy/PhpDumper/ProxyDumper.php
@@ -57,7 +57,7 @@ public function getProxyFactoryCode(Definition $definition, $id)
         if ($definition->isShared()) {
             $instantiation .= " \$this->services['$id'] =";
 
-            if (defined('Symfony\Component\DependencyInjection\ContainerInterface::SCOPE_CONTAINER') && ContainerInterface::SCOPE_CONTAINER !== $scope = $definition->getScope(false)) {
+            if (\defined('Symfony\Component\DependencyInjection\ContainerInterface::SCOPE_CONTAINER') && ContainerInterface::SCOPE_CONTAINER !== $scope = $definition->getScope(false)) {
                 $instantiation .= " \$this->scopedServices['$scope']['$id'] =";
             }
         }
diff --git a/src/Symfony/Bridge/Twig/AppVariable.php b/src/Symfony/Bridge/Twig/AppVariable.php
index dbbee30a471f..cdad4b8ee0f8 100644
--- a/src/Symfony/Bridge/Twig/AppVariable.php
+++ b/src/Symfony/Bridge/Twig/AppVariable.php
@@ -103,7 +103,7 @@ public function getUser()
         }
 
         $user = $token->getUser();
-        if (is_object($user)) {
+        if (\is_object($user)) {
             return $user;
         }
     }
diff --git a/src/Symfony/Bridge/Twig/Command/DebugCommand.php b/src/Symfony/Bridge/Twig/Command/DebugCommand.php
index b7ba43fa3d34..a9c50db50a7c 100644
--- a/src/Symfony/Bridge/Twig/Command/DebugCommand.php
+++ b/src/Symfony/Bridge/Twig/Command/DebugCommand.php
@@ -139,16 +139,16 @@ private function getMetadata($type, $entity)
             if (null === $cb) {
                 return;
             }
-            if (is_array($cb)) {
+            if (\is_array($cb)) {
                 if (!method_exists($cb[0], $cb[1])) {
                     return;
                 }
                 $refl = new \ReflectionMethod($cb[0], $cb[1]);
-            } elseif (is_object($cb) && method_exists($cb, '__invoke')) {
+            } elseif (\is_object($cb) && method_exists($cb, '__invoke')) {
                 $refl = new \ReflectionMethod($cb, '__invoke');
-            } elseif (function_exists($cb)) {
+            } elseif (\function_exists($cb)) {
                 $refl = new \ReflectionFunction($cb);
-            } elseif (is_string($cb) && preg_match('{^(.+)::(.+)$}', $cb, $m) && method_exists($m[1], $m[2])) {
+            } elseif (\is_string($cb) && preg_match('{^(.+)::(.+)$}', $cb, $m) && method_exists($m[1], $m[2])) {
                 $refl = new \ReflectionMethod($m[1], $m[2]);
             } else {
                 throw new \UnexpectedValueException('Unsupported callback type');
@@ -198,8 +198,8 @@ private function getPrettyMetadata($type, $entity)
         }
 
         if ('globals' === $type) {
-            if (is_object($meta)) {
-                return ' = object('.get_class($meta).')';
+            if (\is_object($meta)) {
+                return ' = object('.\get_class($meta).')';
             }
 
             return ' = '.substr(@json_encode($meta), 0, 50);
diff --git a/src/Symfony/Bridge/Twig/Command/LintCommand.php b/src/Symfony/Bridge/Twig/Command/LintCommand.php
index 2c312c58e53e..3a0fffca6f27 100644
--- a/src/Symfony/Bridge/Twig/Command/LintCommand.php
+++ b/src/Symfony/Bridge/Twig/Command/LintCommand.php
@@ -99,7 +99,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
 
         $filenames = $input->getArgument('filename');
 
-        if (0 === count($filenames)) {
+        if (0 === \count($filenames)) {
             if (0 !== ftell(STDIN)) {
                 throw new \RuntimeException('Please provide a filename or pipe template content to STDIN.');
             }
@@ -184,9 +184,9 @@ private function displayTxt(OutputInterface $output, SymfonyStyle $io, $filesInf
         }
 
         if (0 === $errors) {
-            $io->success(sprintf('All %d Twig files contain valid syntax.', count($filesInfo)));
+            $io->success(sprintf('All %d Twig files contain valid syntax.', \count($filesInfo)));
         } else {
-            $io->warning(sprintf('%d Twig files have valid syntax and %d contain errors.', count($filesInfo) - $errors, $errors));
+            $io->warning(sprintf('%d Twig files have valid syntax and %d contain errors.', \count($filesInfo) - $errors, $errors));
         }
 
         return min($errors, 1);
@@ -206,7 +206,7 @@ private function displayJson(OutputInterface $output, $filesInfo)
             }
         });
 
-        $output->writeln(json_encode($filesInfo, defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES : 0));
+        $output->writeln(json_encode($filesInfo, \defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES : 0));
 
         return min($errors, 1);
     }
@@ -239,7 +239,7 @@ private function getContext($template, $line, $context = 3)
         $lines = explode("\n", $template);
 
         $position = max(0, $line - $context);
-        $max = min(count($lines), $line - 1 + $context);
+        $max = min(\count($lines), $line - 1 + $context);
 
         $result = array();
         while ($position < $max) {
diff --git a/src/Symfony/Bridge/Twig/Extension/AssetExtension.php b/src/Symfony/Bridge/Twig/Extension/AssetExtension.php
index 40974686adda..271d71ad2bbe 100644
--- a/src/Symfony/Bridge/Twig/Extension/AssetExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/AssetExtension.php
@@ -62,13 +62,13 @@ public function getFunctions()
     public function getAssetUrl($path, $packageName = null, $absolute = false, $version = null)
     {
         // BC layer to be removed in 3.0
-        if (2 < $count = func_num_args()) {
+        if (2 < $count = \func_num_args()) {
             @trigger_error('Generating absolute URLs with the Twig asset() function was deprecated in 2.7 and will be removed in 3.0. Please use absolute_url() instead.', E_USER_DEPRECATED);
             if (4 === $count) {
                 @trigger_error('Forcing a version with the Twig asset() function was deprecated in 2.7 and will be removed in 3.0.', E_USER_DEPRECATED);
             }
 
-            $args = func_get_args();
+            $args = \func_get_args();
 
             return $this->getLegacyAssetUrl($path, $packageName, $args[2], isset($args[3]) ? $args[3] : null);
         }
diff --git a/src/Symfony/Bridge/Twig/Extension/CodeExtension.php b/src/Symfony/Bridge/Twig/Extension/CodeExtension.php
index e6fc9298fa7d..865befd3ba85 100644
--- a/src/Symfony/Bridge/Twig/Extension/CodeExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/CodeExtension.php
@@ -33,7 +33,7 @@ class CodeExtension extends AbstractExtension
     public function __construct($fileLinkFormat, $rootDir, $charset)
     {
         $this->fileLinkFormat = $fileLinkFormat ?: ini_get('xdebug.file_link_format') ?: get_cfg_var('xdebug.file_link_format');
-        $this->rootDir = str_replace('/', DIRECTORY_SEPARATOR, dirname($rootDir)).DIRECTORY_SEPARATOR;
+        $this->rootDir = str_replace('/', DIRECTORY_SEPARATOR, \dirname($rootDir)).DIRECTORY_SEPARATOR;
         $this->charset = $charset;
     }
 
@@ -92,7 +92,7 @@ public function formatArgs($args)
                 $short = array_pop($parts);
                 $formattedValue = sprintf('<em>object</em>(<abbr title="%s">%s</abbr>)', $item[1], $short);
             } elseif ('array' === $item[0]) {
-                $formattedValue = sprintf('<em>array</em>(%s)', is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]);
+                $formattedValue = sprintf('<em>array</em>(%s)', \is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]);
             } elseif ('string' === $item[0]) {
                 $formattedValue = sprintf("'%s'", htmlspecialchars($item[1], ENT_QUOTES, $this->charset));
             } elseif ('null' === $item[0]) {
@@ -105,7 +105,7 @@ public function formatArgs($args)
                 $formattedValue = str_replace("\n", '', var_export(htmlspecialchars((string) $item[1], ENT_QUOTES, $this->charset), true));
             }
 
-            $result[] = is_int($key) ? $formattedValue : sprintf("'%s' => %s", $key, $formattedValue);
+            $result[] = \is_int($key) ? $formattedValue : sprintf("'%s' => %s", $key, $formattedValue);
         }
 
         return implode(', ', $result);
@@ -142,7 +142,7 @@ public function fileExcerpt($file, $line)
             $content = explode('<br />', $code);
 
             $lines = array();
-            for ($i = max($line - 3, 1), $max = min($line + 3, count($content)); $i <= $max; ++$i) {
+            for ($i = max($line - 3, 1), $max = min($line + 3, \count($content)); $i <= $max; ++$i) {
                 $lines[] = '<li'.($i == $line ? ' class="selected"' : '').'><code>'.self::fixCodeMarkup($content[$i - 1]).'</code></li>';
             }
 
@@ -166,7 +166,7 @@ public function formatFile($file, $line, $text = null)
         if (null === $text) {
             $text = str_replace('/', DIRECTORY_SEPARATOR, $file);
             if (0 === strpos($text, $this->rootDir)) {
-                $text = substr($text, strlen($this->rootDir));
+                $text = substr($text, \strlen($this->rootDir));
                 $text = explode(DIRECTORY_SEPARATOR, $text, 2);
                 $text = sprintf('<abbr title="%s%2$s">%s</abbr>%s', $this->rootDir, $text[0], isset($text[1]) ? DIRECTORY_SEPARATOR.$text[1] : '');
             }
diff --git a/src/Symfony/Bridge/Twig/Extension/DumpExtension.php b/src/Symfony/Bridge/Twig/Extension/DumpExtension.php
index eddd4d7f2afa..70be3e9127d9 100644
--- a/src/Symfony/Bridge/Twig/Extension/DumpExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/DumpExtension.php
@@ -56,7 +56,7 @@ public function dump(Environment $env, $context)
             return;
         }
 
-        if (2 === func_num_args()) {
+        if (2 === \func_num_args()) {
             $vars = array();
             foreach ($context as $key => $value) {
                 if (!$value instanceof Template) {
@@ -66,7 +66,7 @@ public function dump(Environment $env, $context)
 
             $vars = array($vars);
         } else {
-            $vars = func_get_args();
+            $vars = \func_get_args();
             unset($vars[0], $vars[1]);
         }
 
diff --git a/src/Symfony/Bridge/Twig/Extension/FormExtension.php b/src/Symfony/Bridge/Twig/Extension/FormExtension.php
index ab7c6ab626d8..552b39c2b93f 100644
--- a/src/Symfony/Bridge/Twig/Extension/FormExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/FormExtension.php
@@ -152,8 +152,8 @@ public function humanize($text)
      */
     public function isSelectedChoice(ChoiceView $choice, $selectedValue)
     {
-        if (is_array($selectedValue)) {
-            return in_array($choice->value, $selectedValue, true);
+        if (\is_array($selectedValue)) {
+            return \in_array($choice->value, $selectedValue, true);
         }
 
         return $choice->value === $selectedValue;
diff --git a/src/Symfony/Bridge/Twig/Extension/HttpFoundationExtension.php b/src/Symfony/Bridge/Twig/Extension/HttpFoundationExtension.php
index 0dad40cfa0a3..1c1b47bb2be2 100644
--- a/src/Symfony/Bridge/Twig/Extension/HttpFoundationExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/HttpFoundationExtension.php
@@ -97,7 +97,7 @@ public function generateAbsoluteUrl($path)
 
         if (!$path || '/' !== $path[0]) {
             $prefix = $request->getPathInfo();
-            $last = strlen($prefix) - 1;
+            $last = \strlen($prefix) - 1;
             if ($last !== $pos = strrpos($prefix, '/')) {
                 $prefix = substr($prefix, 0, $pos).'/';
             }
diff --git a/src/Symfony/Bridge/Twig/Extension/RoutingExtension.php b/src/Symfony/Bridge/Twig/Extension/RoutingExtension.php
index 97b1ea31360c..f347239d0aca 100644
--- a/src/Symfony/Bridge/Twig/Extension/RoutingExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/RoutingExtension.php
@@ -100,7 +100,7 @@ public function isUrlGenerationSafe(\Twig_Node $argsNode)
             $argsNode->hasNode(1) ? $argsNode->getNode(1) : null
         );
 
-        if (null === $paramsNode || $paramsNode instanceof ArrayExpression && count($paramsNode) <= 2 &&
+        if (null === $paramsNode || $paramsNode instanceof ArrayExpression && \count($paramsNode) <= 2 &&
             (!$paramsNode->hasNode(1) || $paramsNode->getNode(1) instanceof ConstantExpression)
         ) {
             return array('html');
diff --git a/src/Symfony/Bridge/Twig/Extension/YamlExtension.php b/src/Symfony/Bridge/Twig/Extension/YamlExtension.php
index 894a2fd18901..cb0f9e0fd33e 100644
--- a/src/Symfony/Bridge/Twig/Extension/YamlExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/YamlExtension.php
@@ -42,8 +42,8 @@ public function encode($input, $inline = 0, $dumpObjects = false)
             $dumper = new YamlDumper();
         }
 
-        if (defined('Symfony\Component\Yaml\Yaml::DUMP_OBJECT')) {
-            return $dumper->dump($input, $inline, 0, is_bool($dumpObjects) ? Yaml::DUMP_OBJECT : 0);
+        if (\defined('Symfony\Component\Yaml\Yaml::DUMP_OBJECT')) {
+            return $dumper->dump($input, $inline, 0, \is_bool($dumpObjects) ? Yaml::DUMP_OBJECT : 0);
         }
 
         return $dumper->dump($input, $inline, 0, false, $dumpObjects);
@@ -51,12 +51,12 @@ public function encode($input, $inline = 0, $dumpObjects = false)
 
     public function dump($value, $inline = 0, $dumpObjects = false)
     {
-        if (is_resource($value)) {
+        if (\is_resource($value)) {
             return '%Resource%';
         }
 
-        if (is_array($value) || is_object($value)) {
-            return '%'.gettype($value).'% '.$this->encode($value, $inline, $dumpObjects);
+        if (\is_array($value) || \is_object($value)) {
+            return '%'.\gettype($value).'% '.$this->encode($value, $inline, $dumpObjects);
         }
 
         return $this->encode($value, $inline, $dumpObjects);
diff --git a/src/Symfony/Bridge/Twig/Form/TwigRendererEngine.php b/src/Symfony/Bridge/Twig/Form/TwigRendererEngine.php
index d83124e72136..74b2e51b76ad 100644
--- a/src/Symfony/Bridge/Twig/Form/TwigRendererEngine.php
+++ b/src/Symfony/Bridge/Twig/Form/TwigRendererEngine.php
@@ -100,7 +100,7 @@ protected function loadResourceForBlockName($cacheKey, FormView $view, $blockNam
 
         // Check each theme whether it contains the searched block
         if (isset($this->themes[$cacheKey])) {
-            for ($i = count($this->themes[$cacheKey]) - 1; $i >= 0; --$i) {
+            for ($i = \count($this->themes[$cacheKey]) - 1; $i >= 0; --$i) {
                 $this->loadResourcesFromTheme($cacheKey, $this->themes[$cacheKey][$i]);
                 // CONTINUE LOADING (see doc comment)
             }
@@ -108,7 +108,7 @@ protected function loadResourceForBlockName($cacheKey, FormView $view, $blockNam
 
         // Check the default themes once we reach the root view without success
         if (!$view->parent) {
-            for ($i = count($this->defaultThemes) - 1; $i >= 0; --$i) {
+            for ($i = \count($this->defaultThemes) - 1; $i >= 0; --$i) {
                 $this->loadResourcesFromTheme($cacheKey, $this->defaultThemes[$i]);
                 // CONTINUE LOADING (see doc comment)
             }
diff --git a/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php b/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php
index 1a60e67a2f94..7b443ffe5fd2 100644
--- a/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php
+++ b/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php
@@ -64,7 +64,7 @@ protected function doEnterNode(Node $node, Environment $env)
             return $node;
         }
 
-        if ($node instanceof FilterExpression && in_array($node->getNode('filter')->getAttribute('value'), array('trans', 'transchoice'))) {
+        if ($node instanceof FilterExpression && \in_array($node->getNode('filter')->getAttribute('value'), array('trans', 'transchoice'))) {
             $arguments = $node->getNode('arguments');
             $ind = 'trans' === $node->getNode('filter')->getAttribute('value') ? 1 : 2;
             if ($this->isNamedArguments($arguments)) {
@@ -119,7 +119,7 @@ public function getPriority()
     private function isNamedArguments($arguments)
     {
         foreach ($arguments as $name => $node) {
-            if (!is_int($name)) {
+            if (!\is_int($name)) {
                 return true;
             }
         }
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/DumpExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/DumpExtensionTest.php
index 36e0e6a08d99..3b6fbfbe3d76 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/DumpExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/DumpExtensionTest.php
@@ -75,7 +75,7 @@ public function testDump($context, $args, $expectedOutput, $debug = true)
         array_unshift($args, $context);
         array_unshift($args, $twig);
 
-        $dump = call_user_func_array(array($extension, 'dump'), $args);
+        $dump = \call_user_func_array(array($extension, 'dump'), $args);
 
         if ($debug) {
             $this->assertStringStartsWith('<script>', $dump);
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/StopwatchExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/StopwatchExtensionTest.php
index 7bc4eed6ab3e..af042df36875 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/StopwatchExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/StopwatchExtensionTest.php
@@ -56,7 +56,7 @@ public function getTimingTemplates()
 
     protected function getStopwatch($events = array())
     {
-        $events = is_array($events) ? $events : array($events);
+        $events = \is_array($events) ? $events : array($events);
         $stopwatch = $this->getMockBuilder('Symfony\Component\Stopwatch\Stopwatch')->getMock();
 
         $i = -1;
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/TranslationExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/TranslationExtensionTest.php
index 19f219b696d8..4d9481a6b1af 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/TranslationExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/TranslationExtensionTest.php
@@ -207,7 +207,7 @@ protected function getTemplate($template, $translator = null)
             $translator = new Translator('en', new MessageSelector());
         }
 
-        if (is_array($template)) {
+        if (\is_array($template)) {
             $loader = new TwigArrayLoader($template);
         } else {
             $loader = new TwigArrayLoader(array('index' => $template));
diff --git a/src/Symfony/Bridge/Twig/Tests/Translation/TwigExtractorTest.php b/src/Symfony/Bridge/Twig/Tests/Translation/TwigExtractorTest.php
index 013598a40b17..50d447bfb879 100644
--- a/src/Symfony/Bridge/Twig/Tests/Translation/TwigExtractorTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Translation/TwigExtractorTest.php
@@ -90,7 +90,7 @@ public function testExtractSyntaxError($resources)
             $extractor->extract($resources, new MessageCatalogue('en'));
         } catch (Error $e) {
             if (method_exists($e, 'getSourceContext')) {
-                $this->assertSame(dirname(__DIR__).strtr('/Fixtures/extractor/syntax_error.twig', '/', DIRECTORY_SEPARATOR), $e->getFile());
+                $this->assertSame(\dirname(__DIR__).strtr('/Fixtures/extractor/syntax_error.twig', '/', DIRECTORY_SEPARATOR), $e->getFile());
                 $this->assertSame(1, $e->getLine());
                 $this->assertSame('Unclosed "block".', $e->getMessage());
             } else {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Client.php b/src/Symfony/Bundle/FrameworkBundle/Client.php
index 44c805a453e5..fa8beacf37bf 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Client.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Client.php
@@ -166,7 +166,7 @@ protected function getScript($request)
 
         $r = new \ReflectionObject($this->kernel);
 
-        $autoloader = dirname($r->getFileName()).'/autoload.php';
+        $autoloader = \dirname($r->getFileName()).'/autoload.php';
         if (is_file($autoloader)) {
             $autoloader = str_replace("'", "\\'", $autoloader);
         } else {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php
index 7b396799cd87..42d245e48810 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php
@@ -83,7 +83,7 @@ public function validateConfiguration(ExtensionInterface $extension, $configurat
         }
 
         if (!$configuration instanceof ConfigurationInterface) {
-            throw new \LogicException(sprintf('Configuration class "%s" should implement ConfigurationInterface in order to be dumpable', get_class($configuration)));
+            throw new \LogicException(sprintf('Configuration class "%s" should implement ConfigurationInterface in order to be dumpable', \get_class($configuration)));
         }
     }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/AssetsInstallCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/AssetsInstallCommand.php
index 66f7f9ca8b46..2e70dc10d4f1 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/AssetsInstallCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/AssetsInstallCommand.php
@@ -227,7 +227,7 @@ private function absoluteSymlinkWithFallback($originDir, $targetDir)
     private function symlink($originDir, $targetDir, $relative = false)
     {
         if ($relative) {
-            $originDir = $this->filesystem->makePathRelative($originDir, realpath(dirname($targetDir)));
+            $originDir = $this->filesystem->makePathRelative($originDir, realpath(\dirname($targetDir)));
         }
         $this->filesystem->symlink($originDir, $targetDir);
         if (!file_exists($targetDir)) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php
index de1cfc8e2024..abe813a27f9a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php
@@ -124,7 +124,7 @@ protected function warmup($warmupDir, $realCacheDir, $enableOptionalWarmers = tr
     {
         // create a temporary kernel
         $realKernel = $this->getContainer()->get('kernel');
-        $realKernelClass = get_class($realKernel);
+        $realKernelClass = \get_class($realKernel);
         $namespace = '';
         if (false !== $pos = strrpos($realKernelClass, '\\')) {
             $namespace = substr($realKernelClass, 0, $pos);
@@ -144,8 +144,8 @@ protected function warmup($warmupDir, $realCacheDir, $enableOptionalWarmers = tr
         $warmer->warmUp($warmupDir);
 
         // fix references to the Kernel in .meta files
-        $safeTempKernel = str_replace('\\', '\\\\', get_class($tempKernel));
-        $realKernelFQN = get_class($realKernel);
+        $safeTempKernel = str_replace('\\', '\\\\', \get_class($tempKernel));
+        $realKernelFQN = \get_class($realKernel);
 
         foreach (Finder::create()->files()->depth('<3')->name('*.meta')->in($warmupDir) as $file) {
             file_put_contents($file, preg_replace(
@@ -166,8 +166,8 @@ protected function warmup($warmupDir, $realCacheDir, $enableOptionalWarmers = tr
         }
 
         // fix references to container's class
-        $tempContainerClass = get_class($tempKernel->getContainer());
-        $realContainerClass = get_class($realKernel->getContainer());
+        $tempContainerClass = \get_class($tempKernel->getContainer());
+        $realContainerClass = \get_class($realKernel->getContainer());
         foreach (Finder::create()->files()->depth('<2')->name($tempContainerClass.'*')->in($warmupDir) as $file) {
             $content = str_replace($tempContainerClass, $realContainerClass, file_get_contents($file));
             file_put_contents($file, $content);
@@ -195,7 +195,7 @@ protected function getTempKernel(KernelInterface $parent, $namespace, $parentCla
         // to avoid the many problems in serialized resources files
         $class = substr($parentClass, 0, -1).'_';
         // the temp container class must be changed too
-        $containerClass = var_export(substr(get_class($parent->getContainer()), 0, -1).'_', true);
+        $containerClass = var_export(substr(\get_class($parent->getContainer()), 0, -1).'_', true);
         $code = <<<EOF
 <?php
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/ServerCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/ServerCommand.php
index c5f9ee0ecd21..e548f7bc7187 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/ServerCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/ServerCommand.php
@@ -23,7 +23,7 @@ abstract class ServerCommand extends ContainerAwareCommand
      */
     public function isEnabled()
     {
-        if (\PHP_VERSION_ID < 50400 || defined('HHVM_VERSION')) {
+        if (\PHP_VERSION_ID < 50400 || \defined('HHVM_VERSION')) {
             return false;
         }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/ServerStartCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/ServerStartCommand.php
index 5e2f273ac878..5b80cce2533d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/ServerStartCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/ServerStartCommand.php
@@ -76,7 +76,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
     {
         $io = new SymfonyStyle($input, $cliOutput = $output);
 
-        if (!extension_loaded('pcntl')) {
+        if (!\extension_loaded('pcntl')) {
             $io->error(array(
                 'This command needs the pcntl extension to run.',
                 'You can either install it or use the "server:run" command instead to run the built-in web server.',
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php
index 4404f3a0f696..2b989b683187 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php
@@ -181,8 +181,8 @@ protected function execute(InputInterface $input, OutputInterface $output)
                     $states[] = self::MESSAGE_UNUSED;
                 }
 
-                if (!in_array(self::MESSAGE_UNUSED, $states) && true === $input->getOption('only-unused')
-                    || !in_array(self::MESSAGE_MISSING, $states) && true === $input->getOption('only-missing')) {
+                if (!\in_array(self::MESSAGE_UNUSED, $states) && true === $input->getOption('only-unused')
+                    || !\in_array(self::MESSAGE_MISSING, $states) && true === $input->getOption('only-missing')) {
                     continue;
                 }
 
@@ -246,7 +246,7 @@ private function sanitizeString($string, $length = 40)
             if (mb_strlen($string, $encoding) > $length) {
                 return mb_substr($string, 0, $length - 3, $encoding).'...';
             }
-        } elseif (strlen($string) > $length) {
+        } elseif (\strlen($string) > $length) {
             return substr($string, 0, $length - 3).'...';
         }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/TranslationUpdateCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/TranslationUpdateCommand.php
index e0c7d380905f..a7bb41c6726e 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/TranslationUpdateCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/TranslationUpdateCommand.php
@@ -82,7 +82,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
         // check format
         $writer = $this->getContainer()->get('translation.writer');
         $supportedFormats = $writer->getFormats();
-        if (!in_array($input->getOption('output-format'), $supportedFormats)) {
+        if (!\in_array($input->getOption('output-format'), $supportedFormats)) {
             $io->error(array('Wrong output format', 'Supported formats are: '.implode(', ', $supportedFormats).'.'));
 
             return 1;
@@ -145,7 +145,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
             : new MergeOperation($currentCatalogue, $extractedCatalogue);
 
         // Exit if no messages found.
-        if (!count($operation->getDomains())) {
+        if (!\count($operation->getDomains())) {
             $io->warning('No translation messages were found.');
 
             return;
@@ -171,7 +171,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
                     }, array_keys($operation->getObsoleteMessages($domain)))
                 );
 
-                $domainMessagesCount = count($list);
+                $domainMessagesCount = \count($list);
 
                 $io->section(sprintf('Messages extracted for domain "<info>%s</info>" (%d message%s)', $domain, $domainMessagesCount, $domainMessagesCount > 1 ? 's' : ''));
                 $io->listing($list);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/YamlLintCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/YamlLintCommand.php
index ba77eefad5f5..302273e43202 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/YamlLintCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/YamlLintCommand.php
@@ -143,9 +143,9 @@ private function displayTxt(OutputInterface $output, SymfonyStyle $io, $filesInf
         }
 
         if (0 === $errors) {
-            $io->success(sprintf('All %d YAML files contain valid syntax.', count($filesInfo)));
+            $io->success(sprintf('All %d YAML files contain valid syntax.', \count($filesInfo)));
         } else {
-            $io->warning(sprintf('%d YAML files have valid syntax and %d contain errors.', count($filesInfo) - $errors, $errors));
+            $io->warning(sprintf('%d YAML files have valid syntax and %d contain errors.', \count($filesInfo) - $errors, $errors));
         }
 
         return min($errors, 1);
@@ -162,7 +162,7 @@ private function displayJson(OutputInterface $output, $filesInfo)
             }
         });
 
-        $output->writeln(json_encode($filesInfo, defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES : 0));
+        $output->writeln(json_encode($filesInfo, \defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES : 0));
 
         return min($errors, 1);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php
index 32b1f751a813..a9cfe248732d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php
@@ -72,11 +72,11 @@ public function describe(OutputInterface $output, $object, array $options = arra
             case $object instanceof EventDispatcherInterface:
                 $this->describeEventDispatcherListeners($object, $options);
                 break;
-            case is_callable($object):
+            case \is_callable($object):
                 $this->describeCallable($object, $options);
                 break;
             default:
-                throw new \InvalidArgumentException(sprintf('Object of type "%s" is not describable.', get_class($object)));
+                throw new \InvalidArgumentException(sprintf('Object of type "%s" is not describable.', \get_class($object)));
         }
     }
 
@@ -198,11 +198,11 @@ abstract protected function describeCallable($callable, array $options = array()
      */
     protected function formatValue($value)
     {
-        if (is_object($value)) {
-            return sprintf('object(%s)', get_class($value));
+        if (\is_object($value)) {
+            return sprintf('object(%s)', \get_class($value));
         }
 
-        if (is_string($value)) {
+        if (\is_string($value)) {
             return $value;
         }
 
@@ -218,7 +218,7 @@ protected function formatValue($value)
      */
     protected function formatParameter($value)
     {
-        if (is_bool($value) || is_array($value) || (null === $value)) {
+        if (\is_bool($value) || \is_array($value) || (null === $value)) {
             $jsonString = json_encode($value);
 
             if (preg_match('/^(.{60})./us', $jsonString, $matches)) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
index 9163c83c5ea2..5b7d02588d0c 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
@@ -88,7 +88,7 @@ protected function describeContainerService($service, array $options = array())
         } elseif ($service instanceof Definition) {
             $this->writeData($this->getContainerDefinitionData($service), $options);
         } else {
-            $this->writeData(get_class($service), $options);
+            $this->writeData(\get_class($service), $options);
         }
     }
 
@@ -111,7 +111,7 @@ protected function describeContainerServices(ContainerBuilder $builder, array $o
                     $data['definitions'][$serviceId] = $this->getContainerDefinitionData($service);
                 }
             } else {
-                $data['services'][$serviceId] = get_class($service);
+                $data['services'][$serviceId] = \get_class($service);
             }
         }
 
@@ -169,7 +169,7 @@ private function writeData(array $data, array $options)
     {
         $flags = isset($options['json_encoding']) ? $options['json_encoding'] : 0;
 
-        if (defined('JSON_PRETTY_PRINT')) {
+        if (\defined('JSON_PRETTY_PRINT')) {
             $flags |= JSON_PRETTY_PRINT;
         }
 
@@ -191,7 +191,7 @@ protected function getRouteData(Route $route)
             'hostRegex' => '' !== $route->getHost() ? $route->compile()->getHostRegex() : '',
             'scheme' => $route->getSchemes() ? implode('|', $route->getSchemes()) : 'ANY',
             'method' => $route->getMethods() ? implode('|', $route->getMethods()) : 'ANY',
-            'class' => get_class($route),
+            'class' => \get_class($route),
             'defaults' => $route->getDefaults(),
             'requirements' => $requirements ?: 'NO CUSTOM',
             'options' => $route->getOptions(),
@@ -237,7 +237,7 @@ private function getContainerDefinitionData(Definition $definition, $omitTags =
         }
 
         if ($factory = $definition->getFactory()) {
-            if (is_array($factory)) {
+            if (\is_array($factory)) {
                 if ($factory[0] instanceof Reference) {
                     $data['factory_service'] = (string) $factory[0];
                 } elseif ($factory[0] instanceof Definition) {
@@ -316,12 +316,12 @@ private function getCallableData($callable, array $options = array())
     {
         $data = array();
 
-        if (is_array($callable)) {
+        if (\is_array($callable)) {
             $data['type'] = 'function';
 
-            if (is_object($callable[0])) {
+            if (\is_object($callable[0])) {
                 $data['name'] = $callable[1];
-                $data['class'] = get_class($callable[0]);
+                $data['class'] = \get_class($callable[0]);
             } else {
                 if (0 !== strpos($callable[1], 'parent::')) {
                     $data['name'] = $callable[1];
@@ -338,7 +338,7 @@ private function getCallableData($callable, array $options = array())
             return $data;
         }
 
-        if (is_string($callable)) {
+        if (\is_string($callable)) {
             $data['type'] = 'function';
 
             if (false === strpos($callable, '::')) {
@@ -362,7 +362,7 @@ private function getCallableData($callable, array $options = array())
 
         if (method_exists($callable, '__invoke')) {
             $data['type'] = 'object';
-            $data['name'] = get_class($callable);
+            $data['name'] = \get_class($callable);
 
             return $data;
         }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/MarkdownDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/MarkdownDescriptor.php
index d7ae531ba218..592b45df99ba 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/MarkdownDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/MarkdownDescriptor.php
@@ -58,13 +58,13 @@ protected function describeRoute(Route $route, array $options = array())
             ."\n".'- Host Regex: '.('' !== $route->getHost() ? $route->compile()->getHostRegex() : '')
             ."\n".'- Scheme: '.($route->getSchemes() ? implode('|', $route->getSchemes()) : 'ANY')
             ."\n".'- Method: '.($route->getMethods() ? implode('|', $route->getMethods()) : 'ANY')
-            ."\n".'- Class: '.get_class($route)
+            ."\n".'- Class: '.\get_class($route)
             ."\n".'- Defaults: '.$this->formatRouterConfig($route->getDefaults())
             ."\n".'- Requirements: '.($requirements ? $this->formatRouterConfig($requirements) : 'NO CUSTOM')
             ."\n".'- Options: '.$this->formatRouterConfig($route->getOptions());
 
         $this->write(isset($options['name'])
-            ? $options['name']."\n".str_repeat('-', strlen($options['name']))."\n\n".$output
+            ? $options['name']."\n".str_repeat('-', \strlen($options['name']))."\n\n".$output
             : $output);
         $this->write("\n");
     }
@@ -89,7 +89,7 @@ protected function describeContainerTags(ContainerBuilder $builder, array $optio
         $this->write("Container tags\n==============");
 
         foreach ($this->findDefinitionsByTag($builder, $showPrivate) as $tag => $definitions) {
-            $this->write("\n\n".$tag."\n".str_repeat('-', strlen($tag)));
+            $this->write("\n\n".$tag."\n".str_repeat('-', \strlen($tag)));
             foreach ($definitions as $serviceId => $definition) {
                 $this->write("\n\n");
                 $this->describeContainerDefinition($definition, array('omit_tags' => true, 'id' => $serviceId));
@@ -113,7 +113,7 @@ protected function describeContainerService($service, array $options = array())
         } elseif ($service instanceof Definition) {
             $this->describeContainerDefinition($service, $childOptions);
         } else {
-            $this->write(sprintf('**`%s`:** `%s`', $options['id'], get_class($service)));
+            $this->write(sprintf('**`%s`:** `%s`', $options['id'], \get_class($service)));
         }
     }
 
@@ -128,7 +128,7 @@ protected function describeContainerServices(ContainerBuilder $builder, array $o
         if (isset($options['tag'])) {
             $title .= ' with tag `'.$options['tag'].'`';
         }
-        $this->write($title."\n".str_repeat('=', strlen($title)));
+        $this->write($title."\n".str_repeat('=', \strlen($title)));
 
         $serviceIds = isset($options['tag']) && $options['tag'] ? array_keys($builder->findTaggedServiceIds($options['tag'])) : $builder->getServiceIds();
         $showPrivate = isset($options['show_private']) && $options['show_private'];
@@ -168,7 +168,7 @@ protected function describeContainerServices(ContainerBuilder $builder, array $o
             $this->write("\n\nServices\n--------\n");
             foreach ($services['services'] as $id => $service) {
                 $this->write("\n");
-                $this->write(sprintf('- `%s`: `%s`', $id, get_class($service)));
+                $this->write(sprintf('- `%s`: `%s`', $id, \get_class($service)));
             }
         }
     }
@@ -210,7 +210,7 @@ protected function describeContainerDefinition(Definition $definition, array $op
         }
 
         if ($factory = $definition->getFactory()) {
-            if (is_array($factory)) {
+            if (\is_array($factory)) {
                 if ($factory[0] instanceof Reference) {
                     $output .= "\n".'- Factory Service: `'.$factory[0].'`';
                 } elseif ($factory[0] instanceof Definition) {
@@ -254,7 +254,7 @@ protected function describeContainerAlias(Alias $alias, array $options = array()
      */
     protected function describeContainerParameter($parameter, array $options = array())
     {
-        $this->write(isset($options['parameter']) ? sprintf("%s\n%s\n\n%s", $options['parameter'], str_repeat('=', strlen($options['parameter'])), $this->formatParameter($parameter)) : $parameter);
+        $this->write(isset($options['parameter']) ? sprintf("%s\n%s\n\n%s", $options['parameter'], str_repeat('=', \strlen($options['parameter'])), $this->formatParameter($parameter)) : $parameter);
     }
 
     /**
@@ -300,12 +300,12 @@ protected function describeCallable($callable, array $options = array())
     {
         $string = '';
 
-        if (is_array($callable)) {
+        if (\is_array($callable)) {
             $string .= "\n- Type: `function`";
 
-            if (is_object($callable[0])) {
+            if (\is_object($callable[0])) {
                 $string .= "\n".sprintf('- Name: `%s`', $callable[1]);
-                $string .= "\n".sprintf('- Class: `%s`', get_class($callable[0]));
+                $string .= "\n".sprintf('- Class: `%s`', \get_class($callable[0]));
             } else {
                 if (0 !== strpos($callable[1], 'parent::')) {
                     $string .= "\n".sprintf('- Name: `%s`', $callable[1]);
@@ -322,7 +322,7 @@ protected function describeCallable($callable, array $options = array())
             return $this->write($string."\n");
         }
 
-        if (is_string($callable)) {
+        if (\is_string($callable)) {
             $string .= "\n- Type: `function`";
 
             if (false === strpos($callable, '::')) {
@@ -346,7 +346,7 @@ protected function describeCallable($callable, array $options = array())
 
         if (method_exists($callable, '__invoke')) {
             $string .= "\n- Type: `object`";
-            $string .= "\n".sprintf('- Name: `%s`', get_class($callable));
+            $string .= "\n".sprintf('- Name: `%s`', \get_class($callable));
 
             return $this->write($string."\n");
         }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php
index c9b21f032b40..1fef5e463721 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php
@@ -55,8 +55,8 @@ protected function describeRouteCollection(RouteCollection $routes, array $optio
                 $controller = $route->getDefault('_controller');
                 if ($controller instanceof \Closure) {
                     $controller = 'Closure';
-                } elseif (is_object($controller)) {
-                    $controller = get_class($controller);
+                } elseif (\is_object($controller)) {
+                    $controller = \get_class($controller);
                 }
                 $row[] = $controller;
             }
@@ -91,7 +91,7 @@ protected function describeRoute(Route $route, array $options = array())
             array('Scheme', ($route->getSchemes() ? implode('|', $route->getSchemes()) : 'ANY')),
             array('Method', ($route->getMethods() ? implode('|', $route->getMethods()) : 'ANY')),
             array('Requirements', ($requirements ? $this->formatRouterConfig($requirements) : 'NO CUSTOM')),
-            array('Class', get_class($route)),
+            array('Class', \get_class($route)),
             array('Defaults', $this->formatRouterConfig($route->getDefaults())),
             array('Options', $this->formatRouterConfig($route->getOptions())),
         );
@@ -154,7 +154,7 @@ protected function describeContainerService($service, array $options = array())
             $options['output']->table(
                 array('Service ID', 'Class'),
                 array(
-                    array(isset($options['id']) ? $options['id'] : '-', get_class($service)),
+                    array(isset($options['id']) ? $options['id'] : '-', \get_class($service)),
                 )
             );
         }
@@ -196,10 +196,10 @@ protected function describeContainerServices(ContainerBuilder $builder, array $o
                     foreach ($tags as $tag) {
                         foreach ($tag as $key => $value) {
                             if (!isset($maxTags[$key])) {
-                                $maxTags[$key] = strlen($key);
+                                $maxTags[$key] = \strlen($key);
                             }
-                            if (strlen($value) > $maxTags[$key]) {
-                                $maxTags[$key] = strlen($value);
+                            if (\strlen($value) > $maxTags[$key]) {
+                                $maxTags[$key] = \strlen($value);
                             }
                         }
                     }
@@ -207,7 +207,7 @@ protected function describeContainerServices(ContainerBuilder $builder, array $o
             }
         }
 
-        $tagsCount = count($maxTags);
+        $tagsCount = \count($maxTags);
         $tagsNames = array_keys($maxTags);
 
         $tableHeaders = array_merge(array('Service ID'), $tagsNames, array('Class name'));
@@ -234,7 +234,7 @@ protected function describeContainerServices(ContainerBuilder $builder, array $o
                 $alias = $definition;
                 $tableRows[] = array_merge(array($serviceId, sprintf('alias for "%s"', $alias)), $tagsCount ? array_fill(0, $tagsCount, '') : array());
             } else {
-                $tableRows[] = array_merge(array($serviceId, get_class($definition)), $tagsCount ? array_fill(0, $tagsCount, '') : array());
+                $tableRows[] = array_merge(array($serviceId, \get_class($definition)), $tagsCount ? array_fill(0, $tagsCount, '') : array());
             }
         }
 
@@ -304,7 +304,7 @@ protected function describeContainerDefinition(Definition $definition, array $op
         }
 
         if ($factory = $definition->getFactory()) {
-            if (is_array($factory)) {
+            if (\is_array($factory)) {
                 if ($factory[0] instanceof Reference) {
                     $tableRows[] = array('Factory Service', $factory[0]);
                 } elseif ($factory[0] instanceof Definition) {
@@ -418,15 +418,15 @@ private function formatRouterConfig(array $config)
      */
     private function formatCallable($callable)
     {
-        if (is_array($callable)) {
-            if (is_object($callable[0])) {
-                return sprintf('%s::%s()', get_class($callable[0]), $callable[1]);
+        if (\is_array($callable)) {
+            if (\is_object($callable[0])) {
+                return sprintf('%s::%s()', \get_class($callable[0]), $callable[1]);
             }
 
             return sprintf('%s::%s()', $callable[0], $callable[1]);
         }
 
-        if (is_string($callable)) {
+        if (\is_string($callable)) {
             return sprintf('%s()', $callable);
         }
 
@@ -435,7 +435,7 @@ private function formatCallable($callable)
         }
 
         if (method_exists($callable, '__invoke')) {
-            return sprintf('%s::__invoke()', get_class($callable));
+            return sprintf('%s::__invoke()', \get_class($callable));
         }
 
         throw new \InvalidArgumentException('Callable is not describable.');
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/XmlDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/XmlDescriptor.php
index 66b4f02041a5..f4b3aeee1fcf 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/XmlDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/XmlDescriptor.php
@@ -161,7 +161,7 @@ private function getRouteDocument(Route $route, $name = null)
             $routeXML->setAttribute('name', $name);
         }
 
-        $routeXML->setAttribute('class', get_class($route));
+        $routeXML->setAttribute('class', \get_class($route));
 
         $routeXML->appendChild($pathXML = $dom->createElement('path'));
         $pathXML->setAttribute('regex', $route->compile()->getRegex());
@@ -273,7 +273,7 @@ private function getContainerServiceDocument($service, $id)
         } else {
             $dom->appendChild($serviceXML = $dom->createElement('service'));
             $serviceXML->setAttribute('id', $id);
-            $serviceXML->setAttribute('class', get_class($service));
+            $serviceXML->setAttribute('class', \get_class($service));
         }
 
         return $dom;
@@ -340,7 +340,7 @@ private function getContainerDefinitionDocument(Definition $definition, $id = nu
         if ($factory = $definition->getFactory()) {
             $serviceXML->appendChild($factoryXML = $dom->createElement('factory'));
 
-            if (is_array($factory)) {
+            if (\is_array($factory)) {
                 if ($factory[0] instanceof Reference) {
                     $factoryXML->setAttribute('service', (string) $factory[0]);
                 } elseif ($factory[0] instanceof Definition) {
@@ -474,12 +474,12 @@ private function getCallableDocument($callable)
         $dom = new \DOMDocument('1.0', 'UTF-8');
         $dom->appendChild($callableXML = $dom->createElement('callable'));
 
-        if (is_array($callable)) {
+        if (\is_array($callable)) {
             $callableXML->setAttribute('type', 'function');
 
-            if (is_object($callable[0])) {
+            if (\is_object($callable[0])) {
                 $callableXML->setAttribute('name', $callable[1]);
-                $callableXML->setAttribute('class', get_class($callable[0]));
+                $callableXML->setAttribute('class', \get_class($callable[0]));
             } else {
                 if (0 !== strpos($callable[1], 'parent::')) {
                     $callableXML->setAttribute('name', $callable[1]);
@@ -496,7 +496,7 @@ private function getCallableDocument($callable)
             return $dom;
         }
 
-        if (is_string($callable)) {
+        if (\is_string($callable)) {
             $callableXML->setAttribute('type', 'function');
 
             if (false === strpos($callable, '::')) {
@@ -520,7 +520,7 @@ private function getCallableDocument($callable)
 
         if (method_exists($callable, '__invoke')) {
             $callableXML->setAttribute('type', 'object');
-            $callableXML->setAttribute('name', get_class($callable));
+            $callableXML->setAttribute('name', \get_class($callable));
 
             return $dom;
         }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Controller/Controller.php b/src/Symfony/Bundle/FrameworkBundle/Controller/Controller.php
index 66e80d05e522..9c8df593580d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Controller/Controller.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Controller/Controller.php
@@ -355,7 +355,7 @@ public function getUser()
             return;
         }
 
-        if (!is_object($user = $token->getUser())) {
+        if (!\is_object($user = $token->getUser())) {
             // e.g. anonymous authentication
             return;
         }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Controller/ControllerNameParser.php b/src/Symfony/Bundle/FrameworkBundle/Controller/ControllerNameParser.php
index 8de32f1a7b4e..157cea3fba64 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Controller/ControllerNameParser.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Controller/ControllerNameParser.php
@@ -42,7 +42,7 @@ public function __construct(KernelInterface $kernel)
     public function parse($controller)
     {
         $parts = explode(':', $controller);
-        if (3 !== count($parts) || in_array('', $parts, true)) {
+        if (3 !== \count($parts) || \in_array('', $parts, true)) {
             throw new \InvalidArgumentException(sprintf('The "%s" controller is not a valid "a:b:c" controller string.', $controller));
         }
 
@@ -78,7 +78,7 @@ public function parse($controller)
             $msg = sprintf('The _controller value "%s:%s:%s" maps to a "%s" class, but this class was not found. Create this class or check the spelling of the class and its namespace.', $bundle, $controller, $action, $try);
         }
 
-        if (count($bundles) > 1) {
+        if (\count($bundles) > 1) {
             $msg = sprintf('Unable to find controller "%s:%s" in bundles %s.', $bundle, $controller, implode(', ', $bundles));
         }
 
@@ -136,7 +136,7 @@ private function findAlternative($nonExistentBundleName)
             }
 
             $lev = levenshtein($nonExistentBundleName, $bundleName);
-            if ($lev <= strlen($nonExistentBundleName) / 3 && (null === $alternative || $lev < $shortest)) {
+            if ($lev <= \strlen($nonExistentBundleName) / 3 && (null === $alternative || $lev < $shortest)) {
                 $alternative = $bundleName;
                 $shortest = $lev;
             }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Controller/RedirectController.php b/src/Symfony/Bundle/FrameworkBundle/Controller/RedirectController.php
index 9d060ed43ad3..f4f69b9a38ba 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Controller/RedirectController.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Controller/RedirectController.php
@@ -50,7 +50,7 @@ public function redirectAction(Request $request, $route, $permanent = false, $ig
         }
 
         $attributes = array();
-        if (false === $ignoreAttributes || is_array($ignoreAttributes)) {
+        if (false === $ignoreAttributes || \is_array($ignoreAttributes)) {
             $attributes = $request->attributes->get('_route_params');
             unset($attributes['route'], $attributes['permanent'], $attributes['ignoreAttributes']);
             if ($ignoreAttributes) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/DataCollector/RouterDataCollector.php b/src/Symfony/Bundle/FrameworkBundle/DataCollector/RouterDataCollector.php
index b7289e793dc0..114a0621b375 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DataCollector/RouterDataCollector.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DataCollector/RouterDataCollector.php
@@ -24,7 +24,7 @@ class RouterDataCollector extends BaseRouterDataCollector
 {
     public function guessRoute(Request $request, $controller)
     {
-        if (is_array($controller)) {
+        if (\is_array($controller)) {
             $controller = $controller[0];
         }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddCacheWarmerPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddCacheWarmerPass.php
index 5fe2f6202086..3bf7e2301ded 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddCacheWarmerPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddCacheWarmerPass.php
@@ -43,7 +43,7 @@ public function process(ContainerBuilder $container)
 
         // sort by priority and flatten
         krsort($warmers);
-        $warmers = call_user_func_array('array_merge', $warmers);
+        $warmers = \call_user_func_array('array_merge', $warmers);
 
         $container->getDefinition('cache_warmer')->replaceArgument(0, $warmers);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/ConfigCachePass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/ConfigCachePass.php
index a8e1c549a2d6..fcf20bdbd2e4 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/ConfigCachePass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/ConfigCachePass.php
@@ -38,7 +38,7 @@ public function process(ContainerBuilder $container)
 
         // sort by priority and flatten
         krsort($resourceCheckers);
-        $resourceCheckers = call_user_func_array('array_merge', $resourceCheckers);
+        $resourceCheckers = \call_user_func_array('array_merge', $resourceCheckers);
 
         $container->getDefinition('config_cache_factory')->replaceArgument(0, $resourceCheckers);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/PropertyInfoPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/PropertyInfoPass.php
index 589af52fd69e..209bd5230c7e 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/PropertyInfoPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/PropertyInfoPass.php
@@ -69,6 +69,6 @@ private function findAndSortTaggedServices($tagName, ContainerBuilder $container
         krsort($sortedServices);
 
         // Flatten the array
-        return call_user_func_array('array_merge', $sortedServices);
+        return \call_user_func_array('array_merge', $sortedServices);
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/SerializerPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/SerializerPass.php
index f9809db25d1d..4dab80fe771a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/SerializerPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/SerializerPass.php
@@ -65,6 +65,6 @@ private function findAndSortTaggedServices($tagName, ContainerBuilder $container
         krsort($sortedServices);
 
         // Flatten the array
-        return call_user_func_array('array_merge', $sortedServices);
+        return \call_user_func_array('array_merge', $sortedServices);
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TemplatingAssetHelperPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TemplatingAssetHelperPass.php
index 9a0b04f560f2..b506350df598 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TemplatingAssetHelperPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TemplatingAssetHelperPass.php
@@ -42,7 +42,7 @@ public function process(ContainerBuilder $container)
             return;
         }
 
-        if (!is_array($args[1])) {
+        if (!\is_array($args[1])) {
             return;
         }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TemplatingPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TemplatingPass.php
index 4ab3a9ad3dca..d6754202dd86 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TemplatingPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TemplatingPass.php
@@ -30,7 +30,7 @@ public function process(ContainerBuilder $container)
                 }
             }
 
-            if (count($helpers) > 0) {
+            if (\count($helpers) > 0) {
                 $definition = $container->getDefinition('templating.engine.php');
                 $definition->addMethodCall('setHelpers', array($helpers));
             }
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/UnusedTagsPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/UnusedTagsPass.php
index ed852fd04194..f3c8b01300d2 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/UnusedTagsPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/UnusedTagsPass.php
@@ -59,7 +59,7 @@ public function process(ContainerBuilder $container)
 
         foreach ($container->findUnusedTags() as $tag) {
             // skip whitelisted tags
-            if (in_array($tag, $this->whitelist)) {
+            if (\in_array($tag, $this->whitelist)) {
                 continue;
             }
 
@@ -70,7 +70,7 @@ public function process(ContainerBuilder $container)
                     continue;
                 }
 
-                if (false !== strpos($definedTag, $tag) || levenshtein($tag, $definedTag) <= strlen($tag) / 3) {
+                if (false !== strpos($definedTag, $tag) || levenshtein($tag, $definedTag) <= \strlen($tag) / 3) {
                     $candidates[] = $definedTag;
                 }
             }
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
index 1bda5d65c9ae..105af2daeb7d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
@@ -58,9 +58,9 @@ public function getConfigTreeBuilder()
                 ->then(function ($v) {
                     if (!isset($v['templating'])
                         || !$v['templating']['assets_version']
-                        && !count($v['templating']['assets_base_urls']['http'])
-                        && !count($v['templating']['assets_base_urls']['ssl'])
-                        && !count($v['templating']['packages'])
+                        && !\count($v['templating']['assets_base_urls']['http'])
+                        && !\count($v['templating']['assets_base_urls']['ssl'])
+                        && !\count($v['templating']['packages'])
                     ) {
                         $v['assets'] = array(
                             'version' => null,
@@ -78,9 +78,9 @@ public function getConfigTreeBuilder()
                 ->ifTrue(function ($v) { return isset($v['templating']); })
                 ->then(function ($v) {
                     if ($v['templating']['assets_version']
-                        || count($v['templating']['assets_base_urls']['http'])
-                        || count($v['templating']['assets_base_urls']['ssl'])
-                        || count($v['templating']['packages'])
+                        || \count($v['templating']['assets_base_urls']['http'])
+                        || \count($v['templating']['assets_base_urls']['ssl'])
+                        || \count($v['templating']['packages'])
                     ) {
                         @trigger_error('The assets settings under framework.templating are deprecated since Symfony 2.7 and will be removed in 3.0. Use the framework.assets configuration key instead', E_USER_DEPRECATED);
 
@@ -128,8 +128,8 @@ public function getConfigTreeBuilder()
                 ->end()
                 ->arrayNode('trusted_proxies')
                     ->beforeNormalization()
-                        ->ifTrue(function ($v) { return !is_array($v) && null !== $v; })
-                        ->then(function ($v) { return is_bool($v) ? array() : preg_split('/\s*,\s*/', $v); })
+                        ->ifTrue(function ($v) { return !\is_array($v) && null !== $v; })
+                        ->then(function ($v) { return \is_bool($v) ? array() : preg_split('/\s*,\s*/', $v); })
                     ->end()
                     ->prototype('scalar')
                         ->validate()
@@ -424,11 +424,11 @@ private function addRequestSection(ArrayNodeDefinition $rootNode)
                             ->useAttributeAsKey('name')
                             ->prototype('array')
                                 ->beforeNormalization()
-                                    ->ifTrue(function ($v) { return is_array($v) && isset($v['mime_type']); })
+                                    ->ifTrue(function ($v) { return \is_array($v) && isset($v['mime_type']); })
                                     ->then(function ($v) { return $v['mime_type']; })
                                 ->end()
                                 ->beforeNormalization()
-                                    ->ifTrue(function ($v) { return !is_array($v); })
+                                    ->ifTrue(function ($v) { return !\is_array($v); })
                                     ->then(function ($v) { return array($v); })
                                 ->end()
                                 ->prototype('scalar')->end()
@@ -449,7 +449,7 @@ private function addTemplatingSection(ArrayNodeDefinition $rootNode)
             );
 
             foreach ($urls as $i => $url) {
-                if (is_int($i)) {
+                if (\is_int($i)) {
                     if (0 === strpos($url, 'https://') || 0 === strpos($url, '//')) {
                         $urls['http'][] = $urls['ssl'][] = $url;
                     } else {
@@ -479,7 +479,7 @@ private function addTemplatingSection(ArrayNodeDefinition $rootNode)
                                     ->addDefaultChildrenIfNoneSet()
                                     ->prototype('scalar')->defaultValue('FrameworkBundle:Form')->end()
                                     ->validate()
-                                        ->ifTrue(function ($v) {return !in_array('FrameworkBundle:Form', $v); })
+                                        ->ifTrue(function ($v) {return !\in_array('FrameworkBundle:Form', $v); })
                                         ->then(function ($v) {
                                             return array_merge(array('FrameworkBundle:Form'), $v);
                                         })
@@ -495,7 +495,7 @@ private function addTemplatingSection(ArrayNodeDefinition $rootNode)
                             ->performNoDeepMerging()
                             ->addDefaultsIfNotSet()
                             ->beforeNormalization()
-                                ->ifTrue(function ($v) { return !is_array($v); })
+                                ->ifTrue(function ($v) { return !\is_array($v); })
                                 ->then(function ($v) { return array($v); })
                             ->end()
                             ->beforeNormalization()
@@ -520,7 +520,7 @@ private function addTemplatingSection(ArrayNodeDefinition $rootNode)
                             ->isRequired()
                             ->requiresAtLeastOneElement()
                             ->beforeNormalization()
-                                ->ifTrue(function ($v) { return !is_array($v); })
+                                ->ifTrue(function ($v) { return !\is_array($v); })
                                 ->then(function ($v) { return array($v); })
                             ->end()
                             ->prototype('scalar')->end()
@@ -530,7 +530,7 @@ private function addTemplatingSection(ArrayNodeDefinition $rootNode)
                     ->children()
                         ->arrayNode('loaders')
                             ->beforeNormalization()
-                                ->ifTrue(function ($v) { return !is_array($v); })
+                                ->ifTrue(function ($v) { return !\is_array($v); })
                                 ->then(function ($v) { return array($v); })
                              ->end()
                             ->prototype('scalar')->end()
@@ -556,7 +556,7 @@ private function addTemplatingSection(ArrayNodeDefinition $rootNode)
                                         ->performNoDeepMerging()
                                         ->addDefaultsIfNotSet()
                                         ->beforeNormalization()
-                                            ->ifTrue(function ($v) { return !is_array($v); })
+                                            ->ifTrue(function ($v) { return !\is_array($v); })
                                             ->then(function ($v) { return array($v); })
                                         ->end()
                                         ->beforeNormalization()
@@ -596,7 +596,7 @@ private function addAssetsSection(ArrayNodeDefinition $rootNode)
                         ->arrayNode('base_urls')
                             ->requiresAtLeastOneElement()
                             ->beforeNormalization()
-                                ->ifTrue(function ($v) { return !is_array($v); })
+                                ->ifTrue(function ($v) { return !\is_array($v); })
                                 ->then(function ($v) { return array($v); })
                             ->end()
                             ->prototype('scalar')->end()
@@ -620,7 +620,7 @@ private function addAssetsSection(ArrayNodeDefinition $rootNode)
                                     ->arrayNode('base_urls')
                                         ->requiresAtLeastOneElement()
                                         ->beforeNormalization()
-                                            ->ifTrue(function ($v) { return !is_array($v); })
+                                            ->ifTrue(function ($v) { return !\is_array($v); })
                                             ->then(function ($v) { return array($v); })
                                         ->end()
                                         ->prototype('scalar')->end()
@@ -687,7 +687,7 @@ private function addValidationSection(ArrayNodeDefinition $rootNode)
                             ->prototype('scalar')->end()
                             ->treatFalseLike(array())
                             ->validate()
-                                ->ifTrue(function ($v) { return !is_array($v); })
+                                ->ifTrue(function ($v) { return !\is_array($v); })
                                 ->then(function ($v) { return (array) $v; })
                             ->end()
                         ->end()
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
index a20be83dfbce..f4676e21967d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
@@ -49,7 +49,7 @@ class FrameworkExtension extends Extension
      */
     public function load(array $configs, ContainerBuilder $container)
     {
-        $loader = new XmlFileLoader($container, new FileLocator(dirname(__DIR__).'/Resources/config'));
+        $loader = new XmlFileLoader($container, new FileLocator(\dirname(__DIR__).'/Resources/config'));
 
         $loader->load('web.xml');
         $loader->load('services.xml');
@@ -439,7 +439,7 @@ private function registerTemplatingConfiguration(array $config, $ide, ContainerB
             $loaders = array_map(function ($loader) { return new Reference($loader); }, $config['loaders']);
 
             // Use a delegation unless only a single loader was registered
-            if (1 === count($loaders)) {
+            if (1 === \count($loaders)) {
                 $container->setAlias('templating.loader', (string) reset($loaders));
             } else {
                 $container->getDefinition('templating.loader.chain')->addArgument($loaders);
@@ -468,7 +468,7 @@ private function registerTemplatingConfiguration(array $config, $ide, ContainerB
         $engines = array_map(function ($engine) { return new Reference('templating.engine.'.$engine); }, $config['engines']);
 
         // Use a delegation unless only a single engine was registered
-        if (1 === count($engines)) {
+        if (1 === \count($engines)) {
             $container->setAlias('templating', (string) reset($engines));
         } else {
             $templateEngineDefinition = $container->getDefinition('templating.engine.delegating');
@@ -484,7 +484,7 @@ private function registerTemplatingConfiguration(array $config, $ide, ContainerB
         ;
 
         // configure the PHP engine if needed
-        if (in_array('php', $config['engines'], true)) {
+        if (\in_array('php', $config['engines'], true)) {
             $loader->load('templating_php.xml');
 
             $container->setParameter('templating.helper.form.resources', $config['form']['resources']);
@@ -592,17 +592,17 @@ private function registerTranslatorConfiguration(array $config, ContainerBuilder
         if (class_exists('Symfony\Component\Validator\Validation')) {
             $r = new \ReflectionClass('Symfony\Component\Validator\Validation');
 
-            $dirs[] = dirname($r->getFileName()).'/Resources/translations';
+            $dirs[] = \dirname($r->getFileName()).'/Resources/translations';
         }
         if (class_exists('Symfony\Component\Form\Form')) {
             $r = new \ReflectionClass('Symfony\Component\Form\Form');
 
-            $dirs[] = dirname($r->getFileName()).'/Resources/translations';
+            $dirs[] = \dirname($r->getFileName()).'/Resources/translations';
         }
         if (class_exists('Symfony\Component\Security\Core\Exception\AuthenticationException')) {
             $r = new \ReflectionClass('Symfony\Component\Security\Core\Exception\AuthenticationException');
 
-            $dirs[] = dirname(dirname($r->getFileName())).'/Resources/translations';
+            $dirs[] = \dirname(\dirname($r->getFileName())).'/Resources/translations';
         }
         $rootDir = $container->getParameter('kernel.root_dir');
         foreach ($container->getParameter('kernel.bundles_metadata') as $name => $bundle) {
@@ -676,11 +676,11 @@ private function registerValidationConfiguration(array $config, ContainerBuilder
         $container->setParameter('validator.translation_domain', $config['translation_domain']);
 
         list($xmlMappings, $yamlMappings) = $this->getValidatorMappingFiles($container);
-        if (count($xmlMappings) > 0) {
+        if (\count($xmlMappings) > 0) {
             $validatorBuilder->addMethodCall('addXmlMappings', array($xmlMappings));
         }
 
-        if (count($yamlMappings) > 0) {
+        if (\count($yamlMappings) > 0) {
             $validatorBuilder->addMethodCall('addYamlMappings', array($yamlMappings));
         }
 
@@ -719,7 +719,7 @@ private function getValidatorMappingFiles(ContainerBuilder $container)
 
         if (interface_exists('Symfony\Component\Form\FormInterface')) {
             $reflClass = new \ReflectionClass('Symfony\Component\Form\FormInterface');
-            $files[0][] = dirname($reflClass->getFileName()).'/Resources/config/validation.xml';
+            $files[0][] = \dirname($reflClass->getFileName()).'/Resources/config/validation.xml';
             $container->addResource(new FileResource($files[0][0]));
         }
 
@@ -935,7 +935,7 @@ private function getKernelRootHash(ContainerBuilder $container)
      */
     public function getXsdValidationBasePath()
     {
-        return dirname(__DIR__).'/Resources/config/schema';
+        return \dirname(__DIR__).'/Resources/config/schema';
     }
 
     public function getNamespace()
diff --git a/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php b/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php
index 2f258db49d7e..64c29a0eef48 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php
@@ -90,7 +90,7 @@ public function load($resource, $type = null)
         $this->loading = false;
 
         foreach ($collection->all() as $route) {
-            if (!is_string($controller = $route->getDefault('_controller')) || !$controller) {
+            if (!\is_string($controller = $route->getDefault('_controller')) || !$controller) {
                 continue;
             }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php b/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php
index 47b279ce8fbe..c881f551f810 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php
@@ -126,7 +126,7 @@ private function resolveParameters(RouteCollection $collection)
      */
     private function resolve($value)
     {
-        if (is_array($value)) {
+        if (\is_array($value)) {
             foreach ($value as $key => $val) {
                 $value[$key] = $this->resolve($val);
             }
@@ -134,7 +134,7 @@ private function resolve($value)
             return $value;
         }
 
-        if (!is_string($value)) {
+        if (!\is_string($value)) {
             return $value;
         }
 
@@ -148,7 +148,7 @@ private function resolve($value)
 
             $resolved = $container->getParameter($match[1]);
 
-            if (is_string($resolved) || is_numeric($resolved)) {
+            if (\is_string($resolved) || is_numeric($resolved)) {
                 return (string) $resolved;
             }
 
@@ -157,7 +157,7 @@ private function resolve($value)
                 'must be a string or numeric, but it is of type %s.',
                 $match[1],
                 $value,
-                gettype($resolved)
+                \gettype($resolved)
                 )
             );
         }, $value);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/DelegatingEngine.php b/src/Symfony/Bundle/FrameworkBundle/Templating/DelegatingEngine.php
index 0a8e45189470..15d0f5f3dc4c 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/DelegatingEngine.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/DelegatingEngine.php
@@ -66,7 +66,7 @@ public function renderResponse($view, array $parameters = array(), Response $res
     private function resolveEngines()
     {
         foreach ($this->engines as $i => $engine) {
-            if (is_string($engine)) {
+            if (\is_string($engine)) {
                 $this->engines[$i] = $this->container->get($engine);
             }
         }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/GlobalVariables.php b/src/Symfony/Bundle/FrameworkBundle/Templating/GlobalVariables.php
index 454f9dd83d73..58782c3333c5 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/GlobalVariables.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/GlobalVariables.php
@@ -66,7 +66,7 @@ public function getUser()
         }
 
         $user = $token->getUser();
-        if (!is_object($user)) {
+        if (!\is_object($user)) {
             return;
         }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/AssetsHelper.php b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/AssetsHelper.php
index ee9653ceea06..a4c918c50033 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/AssetsHelper.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/AssetsHelper.php
@@ -43,10 +43,10 @@ public function __construct(Packages $packages)
     public function getUrl($path, $packageName = null, $version = null)
     {
         // BC layer to be removed in 3.0
-        if (3 === func_num_args()) {
+        if (3 === \func_num_args()) {
             @trigger_error('Forcing a version for an asset was deprecated in 2.7 and will be removed in 3.0.', E_USER_DEPRECATED);
 
-            $args = func_get_args();
+            $args = \func_get_args();
 
             return $this->getLegacyAssetUrl($path, $packageName, $args[2]);
         }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php
index 7a1eb9700aad..d0d413d8f17b 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php
@@ -84,7 +84,7 @@ public function formatArgs(array $args)
                 $short = array_pop($parts);
                 $formattedValue = sprintf('<em>object</em>(<abbr title="%s">%s</abbr>)', $item[1], $short);
             } elseif ('array' === $item[0]) {
-                $formattedValue = sprintf('<em>array</em>(%s)', is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]);
+                $formattedValue = sprintf('<em>array</em>(%s)', \is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]);
             } elseif ('string' === $item[0]) {
                 $formattedValue = sprintf("'%s'", htmlspecialchars($item[1], ENT_QUOTES, $this->getCharset()));
             } elseif ('null' === $item[0]) {
@@ -97,7 +97,7 @@ public function formatArgs(array $args)
                 $formattedValue = str_replace("\n", '', var_export(htmlspecialchars((string) $item[1], ENT_QUOTES, $this->getCharset()), true));
             }
 
-            $result[] = is_int($key) ? $formattedValue : sprintf("'%s' => %s", $key, $formattedValue);
+            $result[] = \is_int($key) ? $formattedValue : sprintf("'%s' => %s", $key, $formattedValue);
         }
 
         return implode(', ', $result);
@@ -114,7 +114,7 @@ public function formatArgs(array $args)
     public function fileExcerpt($file, $line)
     {
         if (is_readable($file)) {
-            if (extension_loaded('fileinfo')) {
+            if (\extension_loaded('fileinfo')) {
                 $finfo = new \finfo();
 
                 // Check if the file is an application/octet-stream (eg. Phar file) because highlight_file cannot parse these files
@@ -131,7 +131,7 @@ public function fileExcerpt($file, $line)
             $content = explode('<br />', $code);
 
             $lines = array();
-            for ($i = max($line - 3, 1), $max = min($line + 3, count($content)); $i <= $max; ++$i) {
+            for ($i = max($line - 3, 1), $max = min($line + 3, \count($content)); $i <= $max; ++$i) {
                 $lines[] = '<li'.($i == $line ? ' class="selected"' : '').'><code>'.self::fixCodeMarkup($content[$i - 1]).'</code></li>';
             }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/StopwatchHelper.php b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/StopwatchHelper.php
index 47a9cf80ebcb..72269ec69d13 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/StopwatchHelper.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/StopwatchHelper.php
@@ -37,7 +37,7 @@ public function __call($method, $arguments = array())
     {
         if (null !== $this->stopwatch) {
             if (method_exists($this->stopwatch, $method)) {
-                return call_user_func_array(array($this->stopwatch, $method), $arguments);
+                return \call_user_func_array(array($this->stopwatch, $method), $arguments);
             }
 
             throw new \BadMethodCallException(sprintf('Method "%s" of Stopwatch does not exist', $method));
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/PhpEngine.php b/src/Symfony/Bundle/FrameworkBundle/Templating/PhpEngine.php
index 17651c00a0cb..28d87785ece6 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/PhpEngine.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/PhpEngine.php
@@ -46,7 +46,7 @@ public function get($name)
             throw new \InvalidArgumentException(sprintf('The helper "%s" is not defined.', $name));
         }
 
-        if (is_string($this->helpers[$name])) {
+        if (\is_string($this->helpers[$name])) {
             $this->helpers[$name] = $this->container->get($this->helpers[$name]);
             $this->helpers[$name]->setCharset($this->charset);
         }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/TemplateFilenameParser.php b/src/Symfony/Bundle/FrameworkBundle/Templating/TemplateFilenameParser.php
index df3ab19c4d2e..b6870334c6e3 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/TemplateFilenameParser.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/TemplateFilenameParser.php
@@ -34,7 +34,7 @@ public function parse($name)
         $parts = explode('/', str_replace('\\', '/', $name));
 
         $elements = explode('.', array_pop($parts));
-        if (3 > count($elements)) {
+        if (3 > \count($elements)) {
             return false;
         }
         $engine = array_pop($elements);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php b/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
index 9720f49afa61..a21668b79309 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
@@ -59,7 +59,7 @@ protected static function getPhpUnitXmlDir()
         }
 
         if (!is_dir($dir)) {
-            $dir = dirname($dir);
+            $dir = \dirname($dir);
         }
 
         return $dir;
@@ -82,11 +82,11 @@ private static function getPhpUnitCliConfigArgument()
                 $dir = realpath($reversedArgs[$argIndex - 1]);
                 break;
             } elseif (0 === strpos($testArg, '--configuration=')) {
-                $argPath = substr($testArg, strlen('--configuration='));
+                $argPath = substr($testArg, \strlen('--configuration='));
                 $dir = realpath($argPath);
                 break;
             } elseif (0 === strpos($testArg, '-c')) {
-                $argPath = substr($testArg, strlen('-c'));
+                $argPath = substr($testArg, \strlen('-c'));
                 $dir = realpath($argPath);
                 break;
             }
@@ -122,7 +122,7 @@ protected static function getKernelClass()
         $finder = new Finder();
         $finder->name('*Kernel.php')->depth(0)->in($dir);
         $results = iterator_to_array($finder);
-        if (!count($results)) {
+        if (!\count($results)) {
             throw new \RuntimeException('Either set KERNEL_DIR in your phpunit.xml according to https://symfony.com/doc/current/book/testing.html#your-first-functional-test or override the WebTestCase::createKernel() method.');
         }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CacheClearCommand/CacheClearCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CacheClearCommand/CacheClearCommandTest.php
index 6614f3daa260..b8264cbec960 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CacheClearCommand/CacheClearCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CacheClearCommand/CacheClearCommandTest.php
@@ -81,6 +81,6 @@ public function testCacheIsFreshAfterCacheClearedWithWarmup()
             }
         }
         $this->assertTrue($found, 'Kernel file should present as resource');
-        $this->assertRegExp(sprintf('/\'kernel.container_class\'\s*=>\s*\'%s\'/', get_class($this->kernel->getContainer())), file_get_contents($containerFile), 'kernel.container_class is properly set on the dumped container');
+        $this->assertRegExp(sprintf('/\'kernel.container_class\'\s*=>\s*\'%s\'/', \get_class($this->kernel->getContainer())), file_get_contents($containerFile), 'kernel.container_class is properly set on the dumped container');
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/ControllerResolverTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/ControllerResolverTest.php
index fdd88aec0ad5..1aee6bd0da2a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/ControllerResolverTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/ControllerResolverTest.php
@@ -81,7 +81,7 @@ public function testGetControllerService()
 
         $controller = $resolver->getController($request);
 
-        $this->assertInstanceOf(get_class($this), $controller[0]);
+        $this->assertInstanceOf(\get_class($this), $controller[0]);
         $this->assertSame('controllerMethod1', $controller[1]);
     }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php
index 7f350aabee0f..bcbcd1f49a80 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php
@@ -254,19 +254,19 @@ public function testTranslator()
         $files = array_map('realpath', $options['resource_files']['en']);
         $ref = new \ReflectionClass('Symfony\Component\Validator\Validation');
         $this->assertContains(
-            strtr(dirname($ref->getFileName()).'/Resources/translations/validators.en.xlf', '/', DIRECTORY_SEPARATOR),
+            strtr(\dirname($ref->getFileName()).'/Resources/translations/validators.en.xlf', '/', DIRECTORY_SEPARATOR),
             $files,
             '->registerTranslatorConfiguration() finds Validator translation resources'
         );
         $ref = new \ReflectionClass('Symfony\Component\Form\Form');
         $this->assertContains(
-            strtr(dirname($ref->getFileName()).'/Resources/translations/validators.en.xlf', '/', DIRECTORY_SEPARATOR),
+            strtr(\dirname($ref->getFileName()).'/Resources/translations/validators.en.xlf', '/', DIRECTORY_SEPARATOR),
             $files,
             '->registerTranslatorConfiguration() finds Form translation resources'
         );
         $ref = new \ReflectionClass('Symfony\Component\Security\Core\Security');
         $this->assertContains(
-            strtr(dirname($ref->getFileName()).'/Resources/translations/security.en.xlf', '/', DIRECTORY_SEPARATOR),
+            strtr(\dirname($ref->getFileName()).'/Resources/translations/security.en.xlf', '/', DIRECTORY_SEPARATOR),
             $files,
             '->registerTranslatorConfiguration() finds Security translation resources'
         );
@@ -303,7 +303,7 @@ public function testValidation()
         $container = $this->createContainerFromFile('full');
 
         $ref = new \ReflectionClass('Symfony\Component\Form\Form');
-        $xmlMappings = array(dirname($ref->getFileName()).'/Resources/config/validation.xml');
+        $xmlMappings = array(\dirname($ref->getFileName()).'/Resources/config/validation.xml');
 
         $calls = $container->getDefinition('validator.builder')->getMethodCalls();
 
@@ -596,7 +596,7 @@ protected function createContainer(array $data = array())
 
     protected function createContainerFromFile($file, $data = array())
     {
-        $cacheKey = md5(get_class($this).$file.serialize($data));
+        $cacheKey = md5(\get_class($this).$file.serialize($data));
         if (isset(self::$containerCache[$cacheKey])) {
             return self::$containerCache[$cacheKey];
         }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/AnnotatedController.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/AnnotatedController.php
index 98a3ace982e3..96543ce10f6b 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/AnnotatedController.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/AnnotatedController.php
@@ -22,7 +22,7 @@ class AnnotatedController
      */
     public function requestDefaultNullAction(Request $request = null)
     {
-        return new Response($request ? get_class($request) : null);
+        return new Response($request ? \get_class($request) : null);
     }
 
     /**
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/WebTestCase.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/WebTestCase.php
index 2861297fe025..e8fbd65957a3 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/WebTestCase.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/WebTestCase.php
@@ -68,6 +68,6 @@ protected static function createKernel(array $options = array())
 
     protected static function getVarDir()
     {
-        return substr(strrchr(get_called_class(), '\\'), 1);
+        return substr(strrchr(\get_called_class(), '\\'), 1);
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php
index 8e14b53a7472..7551d50339f6 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php
@@ -32,7 +32,7 @@
         break;
     }
 
-    $dir = dirname($dir);
+    $dir = \dirname($dir);
 }
 
 use Symfony\Component\Config\Loader\LoaderInterface;
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperDivLayoutTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperDivLayoutTest.php
index 80d1e696d88d..c260cfb962bd 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperDivLayoutTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperDivLayoutTest.php
@@ -36,7 +36,7 @@ protected function getExtensions()
         // should be moved to the Form component once absolute file paths are supported
         // by the default name parser in the Templating component
         $reflClass = new \ReflectionClass('Symfony\Bundle\FrameworkBundle\FrameworkBundle');
-        $root = realpath(dirname($reflClass->getFileName()).'/Resources/views');
+        $root = realpath(\dirname($reflClass->getFileName()).'/Resources/views');
         $rootTheme = realpath(__DIR__.'/Resources');
         $templateNameParser = new StubTemplateNameParser($root, $rootTheme);
         $loader = new FilesystemLoader(array());
@@ -105,7 +105,7 @@ protected function renderForm(FormView $view, array $vars = array())
     protected function renderEnctype(FormView $view)
     {
         if (!method_exists($form = $this->engine->get('form'), 'enctype')) {
-            $this->markTestSkipped(sprintf('Deprecated method %s->enctype() is not implemented.', get_class($form)));
+            $this->markTestSkipped(sprintf('Deprecated method %s->enctype() is not implemented.', \get_class($form)));
         }
 
         return (string) $form->enctype($view);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperTableLayoutTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperTableLayoutTest.php
index 19f4912e0b5a..e55ee54b747d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperTableLayoutTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperTableLayoutTest.php
@@ -60,7 +60,7 @@ protected function getExtensions()
         // should be moved to the Form component once absolute file paths are supported
         // by the default name parser in the Templating component
         $reflClass = new \ReflectionClass('Symfony\Bundle\FrameworkBundle\FrameworkBundle');
-        $root = realpath(dirname($reflClass->getFileName()).'/Resources/views');
+        $root = realpath(\dirname($reflClass->getFileName()).'/Resources/views');
         $rootTheme = realpath(__DIR__.'/Resources');
         $templateNameParser = new StubTemplateNameParser($root, $rootTheme);
         $loader = new FilesystemLoader(array());
@@ -94,7 +94,7 @@ protected function renderForm(FormView $view, array $vars = array())
     protected function renderEnctype(FormView $view)
     {
         if (!method_exists($form = $this->engine->get('form'), 'enctype')) {
-            $this->markTestSkipped(sprintf('Deprecated method %s->enctype() is not implemented.', get_class($form)));
+            $this->markTestSkipped(sprintf('Deprecated method %s->enctype() is not implemented.', \get_class($form)));
         }
 
         return (string) $form->enctype($view);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateNameParserTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateNameParserTest.php
index aba568c51fa5..b525f31dfe03 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateNameParserTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateNameParserTest.php
@@ -27,7 +27,7 @@ protected function setUp()
             ->expects($this->any())
             ->method('getBundle')
             ->will($this->returnCallback(function ($bundle) {
-                if (in_array($bundle, array('SensioFooBundle', 'SensioCmsFooBundle', 'FooBundle'))) {
+                if (\in_array($bundle, array('SensioFooBundle', 'SensioCmsFooBundle', 'FooBundle'))) {
                     return true;
                 }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Validator/ConstraintValidatorFactoryTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Validator/ConstraintValidatorFactoryTest.php
index 995048455f7b..8c9eeba47b02 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Validator/ConstraintValidatorFactoryTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Validator/ConstraintValidatorFactoryTest.php
@@ -22,7 +22,7 @@ class ConstraintValidatorFactoryTest extends TestCase
 {
     public function testGetInstanceCreatesValidator()
     {
-        $class = get_class($this->getMockForAbstractClass('Symfony\\Component\\Validator\\ConstraintValidator'));
+        $class = \get_class($this->getMockForAbstractClass('Symfony\\Component\\Validator\\ConstraintValidator'));
 
         $constraint = $this->getMockBuilder('Symfony\\Component\\Validator\\Constraint')->getMock();
         $constraint
diff --git a/src/Symfony/Bundle/FrameworkBundle/Translation/PhpExtractor.php b/src/Symfony/Bundle/FrameworkBundle/Translation/PhpExtractor.php
index 6258878e50d5..ae7810037e47 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Translation/PhpExtractor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Translation/PhpExtractor.php
@@ -208,7 +208,7 @@ protected function parseTokens($tokens, MessageCatalogue $catalog)
                     } elseif (self::MESSAGE_TOKEN === $item) {
                         $message = $this->getValue($tokenIterator);
 
-                        if (count($sequence) === ($sequenceKey + 1)) {
+                        if (\count($sequence) === ($sequenceKey + 1)) {
                             break;
                         }
                     } elseif (self::METHOD_ARGUMENTS_TOKEN === $item) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Translation/PhpStringTokenParser.php b/src/Symfony/Bundle/FrameworkBundle/Translation/PhpStringTokenParser.php
index 40722c043343..1071e14b7117 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Translation/PhpStringTokenParser.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Translation/PhpStringTokenParser.php
@@ -113,9 +113,9 @@ public static function parseCallback($matches)
         if (isset(self::$replacements[$str])) {
             return self::$replacements[$str];
         } elseif ('x' === $str[0] || 'X' === $str[0]) {
-            return chr(hexdec($str));
+            return \chr(hexdec($str));
         } else {
-            return chr(octdec($str));
+            return \chr(octdec($str));
         }
     }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Translation/TranslationLoader.php b/src/Symfony/Bundle/FrameworkBundle/Translation/TranslationLoader.php
index 16758d2209fe..c1e6fa443a2f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Translation/TranslationLoader.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Translation/TranslationLoader.php
@@ -58,7 +58,7 @@ public function loadMessages($directory, MessageCatalogue $catalogue)
             $extension = $catalogue->getLocale().'.'.$format;
             $files = $finder->files()->name('*.'.$extension)->in($directory);
             foreach ($files as $file) {
-                $domain = substr($file->getFilename(), 0, -1 * strlen($extension) - 1);
+                $domain = substr($file->getFilename(), 0, -1 * \strlen($extension) - 1);
                 $catalogue->addCatalogue($loader->load($file->getPathname(), $catalogue->getLocale(), $domain));
             }
         }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Validator/ConstraintValidatorFactory.php b/src/Symfony/Bundle/FrameworkBundle/Validator/ConstraintValidatorFactory.php
index 6634b9e2ab4a..f962726ae235 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Validator/ConstraintValidatorFactory.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Validator/ConstraintValidatorFactory.php
@@ -67,11 +67,11 @@ public function getInstance(Constraint $constraint)
 
         if (!isset($this->validators[$name])) {
             if (!class_exists($name)) {
-                throw new ValidatorException(sprintf('Constraint validator "%s" does not exist or it is not enabled. Check the "validatedBy" method in your constraint class "%s".', $name, get_class($constraint)));
+                throw new ValidatorException(sprintf('Constraint validator "%s" does not exist or it is not enabled. Check the "validatedBy" method in your constraint class "%s".', $name, \get_class($constraint)));
             }
 
             $this->validators[$name] = new $name();
-        } elseif (is_string($this->validators[$name])) {
+        } elseif (\is_string($this->validators[$name])) {
             $this->validators[$name] = $this->container->get($this->validators[$name]);
         }
 
diff --git a/src/Symfony/Bundle/SecurityBundle/Command/SetAclCommand.php b/src/Symfony/Bundle/SecurityBundle/Command/SetAclCommand.php
index 7d0f3a261b12..36343a0c506e 100644
--- a/src/Symfony/Bundle/SecurityBundle/Command/SetAclCommand.php
+++ b/src/Symfony/Bundle/SecurityBundle/Command/SetAclCommand.php
@@ -95,7 +95,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
         foreach ($input->getArgument('arguments') as $argument) {
             $data = explode(':', $argument, 2);
 
-            if (count($data) > 1) {
+            if (\count($data) > 1) {
                 $objectIdentities[] = new ObjectIdentity($data[1], strtr($data[0], '/', '\\'));
             } else {
                 $maskBuilder->add($data[0]);
@@ -120,7 +120,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
             foreach ($userOption as $user) {
                 $data = explode(':', $user, 2);
 
-                if (1 === count($data)) {
+                if (1 === \count($data)) {
                     throw new \InvalidArgumentException('The user must follow the format "Acme/MyUser:username".');
                 }
 
diff --git a/src/Symfony/Bundle/SecurityBundle/Command/UserPasswordEncoderCommand.php b/src/Symfony/Bundle/SecurityBundle/Command/UserPasswordEncoderCommand.php
index 7151175d938e..5699d9a9164a 100644
--- a/src/Symfony/Bundle/SecurityBundle/Command/UserPasswordEncoderCommand.php
+++ b/src/Symfony/Bundle/SecurityBundle/Command/UserPasswordEncoderCommand.php
@@ -127,7 +127,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $encodedPassword = $encoder->encodePassword($password, $salt);
 
         $rows = array(
-            array('Encoder used', get_class($encoder)),
+            array('Encoder used', \get_class($encoder)),
             array('Encoded password', $encodedPassword),
         );
         if (!$emptySalt) {
@@ -136,7 +136,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $io->table(array('Key', 'Value'), $rows);
 
         if (!$emptySalt) {
-            $io->note(sprintf('Make sure that your salt storage field fits the salt length: %s chars', strlen($salt)));
+            $io->note(sprintf('Make sure that your salt storage field fits the salt length: %s chars', \strlen($salt)));
         } elseif ($bcryptWithoutEmptySalt) {
             $io->note('Bcrypt encoder used: the encoder generated its own built-in salt.');
         }
diff --git a/src/Symfony/Bundle/SecurityBundle/DataCollector/SecurityDataCollector.php b/src/Symfony/Bundle/SecurityBundle/DataCollector/SecurityDataCollector.php
index 6ac33dbb925f..4df25b8b6aee 100644
--- a/src/Symfony/Bundle/SecurityBundle/DataCollector/SecurityDataCollector.php
+++ b/src/Symfony/Bundle/SecurityBundle/DataCollector/SecurityDataCollector.php
@@ -69,7 +69,7 @@ public function collect(Request $request, Response $response, \Exception $except
             if (null !== $this->roleHierarchy) {
                 $allRoles = $this->roleHierarchy->getReachableRoles($assignedRoles);
                 foreach ($allRoles as $role) {
-                    if (!in_array($role, $assignedRoles, true)) {
+                    if (!\in_array($role, $assignedRoles, true)) {
                         $inheritedRoles[] = $role;
                     }
                 }
@@ -87,7 +87,7 @@ public function collect(Request $request, Response $response, \Exception $except
             $this->data = array(
                 'enabled' => true,
                 'authenticated' => $token->isAuthenticated(),
-                'token_class' => get_class($token),
+                'token_class' => \get_class($token),
                 'logout_url' => $logoutUrl,
                 'user' => $token->getUsername(),
                 'roles' => array_map(function (RoleInterface $role) { return $role->getRole(); }, $assignedRoles),
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/AddSecurityVotersPass.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/AddSecurityVotersPass.php
index f4c494c1255a..cef72e07969d 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/AddSecurityVotersPass.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/AddSecurityVotersPass.php
@@ -39,7 +39,7 @@ public function process(ContainerBuilder $container)
         }
 
         krsort($voters);
-        $voters = call_user_func_array('array_merge', $voters);
+        $voters = \call_user_func_array('array_merge', $voters);
 
         if (!$voters) {
             throw new LogicException('No security voters found. You need to tag at least one with "security.voter"');
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/MainConfiguration.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/MainConfiguration.php
index db43883aaf72..669874f88a65 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/MainConfiguration.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/MainConfiguration.php
@@ -137,7 +137,7 @@ private function addRoleHierarchySection(ArrayNodeDefinition $rootNode)
                         ->performNoDeepMerging()
                         ->beforeNormalization()->ifString()->then(function ($v) { return array('value' => $v); })->end()
                         ->beforeNormalization()
-                            ->ifTrue(function ($v) { return is_array($v) && isset($v['value']); })
+                            ->ifTrue(function ($v) { return \is_array($v) && isset($v['value']); })
                             ->then(function ($v) { return preg_split('/\s*,\s*/', $v['value']); })
                         ->end()
                         ->prototype('scalar')->end()
@@ -268,7 +268,7 @@ private function addFirewallsSection(ArrayNodeDefinition $rootNode, array $facto
                 ->children()
                     ->arrayNode('delete_cookies')
                         ->beforeNormalization()
-                            ->ifTrue(function ($v) { return is_array($v) && is_int(key($v)); })
+                            ->ifTrue(function ($v) { return \is_array($v) && \is_int(key($v)); })
                             ->then(function ($v) { return array_map(function ($v) { return array('name' => $v); }, $v); })
                         ->end()
                         ->useAttributeAsKey('name')
@@ -407,11 +407,11 @@ private function addProvidersSection(ArrayNodeDefinition $rootNode)
 
         $providerNodeBuilder
             ->validate()
-                ->ifTrue(function ($v) { return count($v) > 1; })
+                ->ifTrue(function ($v) { return \count($v) > 1; })
                 ->thenInvalid('You cannot set multiple provider types for the same provider')
             ->end()
             ->validate()
-                ->ifTrue(function ($v) { return 0 === count($v); })
+                ->ifTrue(function ($v) { return 0 === \count($v); })
                 ->thenInvalid('You must set a provider definition for the provider.')
             ->end()
         ;
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/AbstractFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/AbstractFactory.php
index f41564280114..a12260226395 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/AbstractFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/AbstractFactory.php
@@ -81,7 +81,7 @@ public function addConfiguration(NodeDefinition $node)
         ;
 
         foreach (array_merge($this->options, $this->defaultSuccessHandlerOptions, $this->defaultFailureHandlerOptions) as $name => $default) {
-            if (is_bool($default)) {
+            if (\is_bool($default)) {
                 $builder->booleanNode($name)->defaultValue($default);
             } else {
                 $builder->scalarNode($name)->defaultValue($default);
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/GuardAuthenticationFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/GuardAuthenticationFactory.php
index 533560d6d986..8970051c2751 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/GuardAuthenticationFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/GuardAuthenticationFactory.php
@@ -109,7 +109,7 @@ private function determineEntryPoint($defaultEntryPointId, array $config)
         }
 
         $authenticatorIds = $config['authenticators'];
-        if (1 == count($authenticatorIds)) {
+        if (1 == \count($authenticatorIds)) {
             // if there is only one authenticator, use that as the entry point
             return array_shift($authenticatorIds);
         }
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RememberMeFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RememberMeFactory.php
index bd36a0fca989..2ae43fa0b302 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RememberMeFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RememberMeFactory.php
@@ -94,7 +94,7 @@ public function create(ContainerBuilder $container, $id, $config, $userProvider,
                 $userProviders[] = new Reference('security.user.provider.concrete.'.$providerName);
             }
         }
-        if (0 === count($userProviders)) {
+        if (0 === \count($userProviders)) {
             throw new \RuntimeException('You must configure at least one remember-me aware listener (such as form-login) for each firewall that has remember-me enabled.');
         }
 
@@ -154,7 +154,7 @@ public function addConfiguration(NodeDefinition $node)
         ;
 
         foreach ($this->options as $name => $value) {
-            if (is_bool($value)) {
+            if (\is_bool($value)) {
                 $builder->booleanNode($name)->defaultValue($value);
             } else {
                 $builder->scalarNode($name)->defaultValue($value);
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
index 0b671d96914d..4ca56881b836 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
@@ -165,7 +165,7 @@ private function configureDbalAclProvider(array $config, ContainerBuilder $conta
 
     private function createRoleHierarchy(array $config, ContainerBuilder $container)
     {
-        if (!isset($config['role_hierarchy']) || 0 === count($config['role_hierarchy'])) {
+        if (!isset($config['role_hierarchy']) || 0 === \count($config['role_hierarchy'])) {
             $container->removeDefinition('security.access.role_hierarchy_voter');
 
             return;
@@ -328,7 +328,7 @@ private function createFirewall(ContainerBuilder $container, $id, $firewall, &$a
             }
 
             // add cookie logout handler
-            if (count($firewall['logout']['delete_cookies']) > 0) {
+            if (\count($firewall['logout']['delete_cookies']) > 0) {
                 $cookieHandlerId = 'security.logout.handler.cookie_clearing.'.$id;
                 $cookieHandler = $container->setDefinition($cookieHandlerId, new DefinitionDecorator('security.logout.handler.cookie_clearing'));
                 $cookieHandler->addArgument($firewall['logout']['delete_cookies']);
@@ -384,7 +384,7 @@ private function createContextListener($container, $contextKey)
             return $this->contextListeners[$contextKey];
         }
 
-        $listenerId = 'security.context_listener.'.count($this->contextListeners);
+        $listenerId = 'security.context_listener.'.\count($this->contextListeners);
         $listener = $container->setDefinition($listenerId, new DefinitionDecorator('security.context_listener'));
         $listener->replaceArgument(2, $contextKey);
 
@@ -622,7 +622,7 @@ private function createRequestMatcher($container, $path = null, $host = null, $m
 
         // only add arguments that are necessary
         $arguments = array($path, $host, $methods, $ip, $attributes);
-        while (count($arguments) > 0 && !end($arguments)) {
+        while (\count($arguments) > 0 && !end($arguments)) {
             array_pop($arguments);
         }
 
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/CompleteConfigurationTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/CompleteConfigurationTest.php
index 77f3ab260694..7eea867f36ee 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/CompleteConfigurationTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/CompleteConfigurationTest.php
@@ -155,7 +155,7 @@ public function testAccess()
             $this->assertArrayNotHasKey($matcherId, $matcherIds);
             $matcherIds[$matcherId] = true;
 
-            $i = count($matcherIds);
+            $i = \count($matcherIds);
             if (1 === $i) {
                 $this->assertEquals(array('ROLE_USER'), $attributes);
                 $this->assertEquals('https', $channel);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/WebTestCase.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/WebTestCase.php
index 8bace799a37a..8a109d5354b8 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/WebTestCase.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/WebTestCase.php
@@ -68,6 +68,6 @@ protected static function createKernel(array $options = array())
 
     protected static function getVarDir()
     {
-        return substr(strrchr(get_called_class(), '\\'), 1);
+        return substr(strrchr(\get_called_class(), '\\'), 1);
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AppKernel.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AppKernel.php
index c448b7c172d6..19632d12d1a4 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AppKernel.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AppKernel.php
@@ -32,7 +32,7 @@
         break;
     }
 
-    $dir = dirname($dir);
+    $dir = \dirname($dir);
 }
 
 use Symfony\Component\Config\Loader\LoaderInterface;
diff --git a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExceptionListenerPass.php b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExceptionListenerPass.php
index b7ebb2a40651..c370a10658ff 100644
--- a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExceptionListenerPass.php
+++ b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExceptionListenerPass.php
@@ -32,7 +32,7 @@ public function process(ContainerBuilder $container)
             $container->removeDefinition('twig.exception_listener');
         } elseif ($container->hasParameter('templating.engines')) {
             $engines = $container->getParameter('templating.engines');
-            if (!in_array('twig', $engines)) {
+            if (!\in_array('twig', $engines)) {
                 $container->removeDefinition('twig.exception_listener');
             }
         }
diff --git a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExtensionPass.php b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExtensionPass.php
index 008fbd0437ed..b91744781a1b 100644
--- a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExtensionPass.php
+++ b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExtensionPass.php
@@ -46,7 +46,7 @@ public function process(ContainerBuilder $container)
             $container->getDefinition('twig.extension.form')->addTag('twig.extension');
             $reflClass = new \ReflectionClass('Symfony\Bridge\Twig\Extension\FormExtension');
 
-            $coreThemePath = dirname(dirname($reflClass->getFileName())).'/Resources/views/Form';
+            $coreThemePath = \dirname(\dirname($reflClass->getFileName())).'/Resources/views/Form';
             $container->getDefinition('twig.loader.native_filesystem')->addMethodCall('addPath', array($coreThemePath));
 
             $paths = $container->getDefinition('twig.cache_warmer')->getArgument(2);
diff --git a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Configuration.php b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Configuration.php
index bcfb74d0a2b5..19c4d2afa53d 100644
--- a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Configuration.php
+++ b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Configuration.php
@@ -62,7 +62,7 @@ private function addFormSection(ArrayNodeDefinition $rootNode)
             ->end()
             ->validate()
                 ->ifTrue(function ($v) {
-                    return count($v['form']['resources']) > 0;
+                    return \count($v['form']['resources']) > 0;
                 })
                 ->then(function ($v) {
                     $v['form_themes'] = array_values(array_unique(array_merge($v['form']['resources'], $v['form_themes'])));
@@ -81,7 +81,7 @@ private function addFormSection(ArrayNodeDefinition $rootNode)
                             ->prototype('scalar')->defaultValue('form_div_layout.html.twig')->end()
                             ->example(array('MyBundle::form.html.twig'))
                             ->validate()
-                                ->ifTrue(function ($v) {return !in_array('form_div_layout.html.twig', $v); })
+                                ->ifTrue(function ($v) {return !\in_array('form_div_layout.html.twig', $v); })
                                 ->then(function ($v) {
                                     return array_merge(array('form_div_layout.html.twig'), $v);
                                 })
@@ -103,7 +103,7 @@ private function addFormThemesSection(ArrayNodeDefinition $rootNode)
                     ->prototype('scalar')->defaultValue('form_div_layout.html.twig')->end()
                     ->example(array('MyBundle::form.html.twig'))
                     ->validate()
-                        ->ifTrue(function ($v) { return !in_array('form_div_layout.html.twig', $v); })
+                        ->ifTrue(function ($v) { return !\in_array('form_div_layout.html.twig', $v); })
                         ->then(function ($v) {
                             return array_merge(array('form_div_layout.html.twig'), $v);
                         })
@@ -124,7 +124,7 @@ private function addGlobalsSection(ArrayNodeDefinition $rootNode)
                     ->example(array('foo' => '"@bar"', 'pi' => 3.14))
                     ->prototype('array')
                         ->beforeNormalization()
-                            ->ifTrue(function ($v) { return is_string($v) && 0 === strpos($v, '@'); })
+                            ->ifTrue(function ($v) { return \is_string($v) && 0 === strpos($v, '@'); })
                             ->then(function ($v) {
                                 if (0 === strpos($v, '@@')) {
                                     return substr($v, 1);
@@ -135,7 +135,7 @@ private function addGlobalsSection(ArrayNodeDefinition $rootNode)
                         ->end()
                         ->beforeNormalization()
                             ->ifTrue(function ($v) {
-                                if (is_array($v)) {
+                                if (\is_array($v)) {
                                     $keys = array_keys($v);
                                     sort($keys);
 
@@ -185,7 +185,7 @@ private function addTwigOptions(ArrayNodeDefinition $rootNode)
                         ->then(function ($paths) {
                             $normalized = array();
                             foreach ($paths as $path => $namespace) {
-                                if (is_array($namespace)) {
+                                if (\is_array($namespace)) {
                                     // xml
                                     $path = $namespace['value'];
                                     $namespace = $namespace['namespace'];
diff --git a/src/Symfony/Bundle/TwigBundle/DependencyInjection/TwigExtension.php b/src/Symfony/Bundle/TwigBundle/DependencyInjection/TwigExtension.php
index 5d8e82e7899f..ba3f25e6d9ae 100644
--- a/src/Symfony/Bundle/TwigBundle/DependencyInjection/TwigExtension.php
+++ b/src/Symfony/Bundle/TwigBundle/DependencyInjection/TwigExtension.php
@@ -46,7 +46,7 @@ public function load(array $configs, ContainerBuilder $container)
         foreach ($configs as $key => $config) {
             if (isset($config['globals'])) {
                 foreach ($config['globals'] as $name => $value) {
-                    if (is_array($value) && isset($value['key'])) {
+                    if (\is_array($value) && isset($value['key'])) {
                         $configs[$key]['globals'][$name] = array(
                             'key' => $name,
                             'value' => $value,
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/TwigExtensionTest.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/TwigExtensionTest.php
index f385ec04fd28..536121bd87eb 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/TwigExtensionTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/TwigExtensionTest.php
@@ -106,7 +106,7 @@ public function testLoadFullConfiguration($format)
         $this->assertEquals(3.14, $calls[3][1][1], '->load() registers variables as Twig globals');
 
         // Yaml and Php specific configs
-        if (in_array($format, array('yml', 'php'))) {
+        if (\in_array($format, array('yml', 'php'))) {
             $this->assertEquals('bad', $calls[4][1][0], '->load() registers variables as Twig globals');
             $this->assertEquals(array('key' => 'foo'), $calls[4][1][1], '->load() registers variables as Twig globals');
         }
@@ -189,7 +189,7 @@ public function testGlobalsWithDifferentTypesAndValues()
         $this->compileContainer($container);
 
         $calls = $container->getDefinition('twig')->getMethodCalls();
-        foreach (array_slice($calls, 1) as $call) {
+        foreach (\array_slice($calls, 1) as $call) {
             $this->assertEquals(key($globals), $call[1][0]);
             $this->assertSame(current($globals), $call[1][1]);
 
diff --git a/src/Symfony/Bundle/WebProfilerBundle/EventListener/WebDebugToolbarListener.php b/src/Symfony/Bundle/WebProfilerBundle/EventListener/WebDebugToolbarListener.php
index 5d020fe914bb..40fcecbf8af0 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/EventListener/WebDebugToolbarListener.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/EventListener/WebDebugToolbarListener.php
@@ -69,7 +69,7 @@ public function onKernelResponse(FilterResponseEvent $event)
                     $this->urlGenerator->generate('_profiler', array('token' => $response->headers->get('X-Debug-Token')), UrlGeneratorInterface::ABSOLUTE_URL)
                 );
             } catch (\Exception $e) {
-                $response->headers->set('X-Debug-Error', get_class($e).': '.preg_replace('/\s+/', ' ', $e->getMessage()));
+                $response->headers->set('X-Debug-Error', \get_class($e).': '.preg_replace('/\s+/', ' ', $e->getMessage()));
             }
         }
 
diff --git a/src/Symfony/Component/Asset/UrlPackage.php b/src/Symfony/Component/Asset/UrlPackage.php
index 782b2ddfce93..56850330fa91 100644
--- a/src/Symfony/Component/Asset/UrlPackage.php
+++ b/src/Symfony/Component/Asset/UrlPackage.php
@@ -47,7 +47,7 @@ public function __construct($baseUrls, VersionStrategyInterface $versionStrategy
     {
         parent::__construct($versionStrategy, $context);
 
-        if (!is_array($baseUrls)) {
+        if (!\is_array($baseUrls)) {
             $baseUrls = (array) $baseUrls;
         }
 
@@ -101,7 +101,7 @@ public function getUrl($path)
      */
     public function getBaseUrl($path)
     {
-        if (1 === count($this->baseUrls)) {
+        if (1 === \count($this->baseUrls)) {
             return $this->baseUrls[0];
         }
 
@@ -120,7 +120,7 @@ public function getBaseUrl($path)
      */
     protected function chooseBaseUrl($path)
     {
-        return (int) fmod(hexdec(substr(hash('sha256', $path), 0, 10)), count($this->baseUrls));
+        return (int) fmod(hexdec(substr(hash('sha256', $path), 0, 10)), \count($this->baseUrls));
     }
 
     private function getSslUrls($urls)
diff --git a/src/Symfony/Component/BrowserKit/Client.php b/src/Symfony/Component/BrowserKit/Client.php
index 48c20b7f55db..7246d1213823 100644
--- a/src/Symfony/Component/BrowserKit/Client.php
+++ b/src/Symfony/Component/BrowserKit/Client.php
@@ -471,7 +471,7 @@ public function followRedirect()
 
         $request = $this->internalRequest;
 
-        if (in_array($this->internalResponse->getStatus(), array(302, 303))) {
+        if (\in_array($this->internalResponse->getStatus(), array(302, 303))) {
             $method = 'GET';
             $files = array();
             $content = null;
diff --git a/src/Symfony/Component/BrowserKit/Cookie.php b/src/Symfony/Component/BrowserKit/Cookie.php
index 1afd8da5f8e3..8857b62317b4 100644
--- a/src/Symfony/Component/BrowserKit/Cookie.php
+++ b/src/Symfony/Component/BrowserKit/Cookie.php
@@ -169,7 +169,7 @@ public static function fromString($cookie, $url = null)
                 continue;
             }
 
-            if (2 === count($elements = explode('=', $part, 2))) {
+            if (2 === \count($elements = explode('=', $part, 2))) {
                 if ('expires' === strtolower($elements[0])) {
                     $elements[1] = self::parseDate($elements[1]);
                 }
@@ -193,7 +193,7 @@ public static function fromString($cookie, $url = null)
     private static function parseDate($dateValue)
     {
         // trim single quotes around date if present
-        if (($length = strlen($dateValue)) > 1 && "'" === $dateValue[0] && "'" === $dateValue[$length - 1]) {
+        if (($length = \strlen($dateValue)) > 1 && "'" === $dateValue[0] && "'" === $dateValue[$length - 1]) {
             $dateValue = substr($dateValue, 1, -1);
         }
 
diff --git a/src/Symfony/Component/BrowserKit/CookieJar.php b/src/Symfony/Component/BrowserKit/CookieJar.php
index 7a4d64c10e5e..24eb9abeddbf 100644
--- a/src/Symfony/Component/BrowserKit/CookieJar.php
+++ b/src/Symfony/Component/BrowserKit/CookieJar.php
@@ -123,7 +123,7 @@ public function updateFromSetCookie(array $setCookies, $uri = null)
                 if (0 === $i || preg_match('/^(?P<token>\s*[0-9A-Za-z!#\$%\&\'\*\+\-\.^_`\|~]+)=/', $part)) {
                     $cookies[] = ltrim($part);
                 } else {
-                    $cookies[count($cookies) - 1] .= ','.$part;
+                    $cookies[\count($cookies) - 1] .= ','.$part;
                 }
             }
         }
@@ -186,13 +186,13 @@ public function allValues($uri, $returnsRawValue = false)
         foreach ($this->cookieJar as $domain => $pathCookies) {
             if ($domain) {
                 $domain = '.'.ltrim($domain, '.');
-                if ($domain != substr('.'.$parts['host'], -strlen($domain))) {
+                if ($domain != substr('.'.$parts['host'], -\strlen($domain))) {
                     continue;
                 }
             }
 
             foreach ($pathCookies as $path => $namedCookies) {
-                if ($path != substr($parts['path'], 0, strlen($path))) {
+                if ($path != substr($parts['path'], 0, \strlen($path))) {
                     continue;
                 }
 
diff --git a/src/Symfony/Component/BrowserKit/History.php b/src/Symfony/Component/BrowserKit/History.php
index aeca3277341c..beec17c6b4d9 100644
--- a/src/Symfony/Component/BrowserKit/History.php
+++ b/src/Symfony/Component/BrowserKit/History.php
@@ -35,9 +35,9 @@ public function clear()
      */
     public function add(Request $request)
     {
-        $this->stack = array_slice($this->stack, 0, $this->position + 1);
+        $this->stack = \array_slice($this->stack, 0, $this->position + 1);
         $this->stack[] = clone $request;
-        $this->position = count($this->stack) - 1;
+        $this->position = \count($this->stack) - 1;
     }
 
     /**
@@ -47,7 +47,7 @@ public function add(Request $request)
      */
     public function isEmpty()
     {
-        return 0 == count($this->stack);
+        return 0 == \count($this->stack);
     }
 
     /**
@@ -75,7 +75,7 @@ public function back()
      */
     public function forward()
     {
-        if ($this->position > count($this->stack) - 2) {
+        if ($this->position > \count($this->stack) - 2) {
             throw new \LogicException('You are already on the last page.');
         }
 
diff --git a/src/Symfony/Component/BrowserKit/Response.php b/src/Symfony/Component/BrowserKit/Response.php
index ba4e416bf804..766a87e4d6d6 100644
--- a/src/Symfony/Component/BrowserKit/Response.php
+++ b/src/Symfony/Component/BrowserKit/Response.php
@@ -44,7 +44,7 @@ public function __toString()
     {
         $headers = '';
         foreach ($this->headers as $name => $value) {
-            if (is_string($value)) {
+            if (\is_string($value)) {
                 $headers .= $this->buildHeader($name, $value);
             } else {
                 foreach ($value as $headerValue) {
@@ -113,10 +113,10 @@ public function getHeader($header, $first = true)
         foreach ($this->headers as $key => $value) {
             if (str_replace('-', '_', strtolower($key)) === $normalizedHeader) {
                 if ($first) {
-                    return is_array($value) ? (count($value) ? $value[0] : '') : $value;
+                    return \is_array($value) ? (\count($value) ? $value[0] : '') : $value;
                 }
 
-                return is_array($value) ? $value : array($value);
+                return \is_array($value) ? $value : array($value);
             }
         }
 
diff --git a/src/Symfony/Component/ClassLoader/ApcClassLoader.php b/src/Symfony/Component/ClassLoader/ApcClassLoader.php
index 3a1c4ee45c55..74f29cb71035 100644
--- a/src/Symfony/Component/ClassLoader/ApcClassLoader.php
+++ b/src/Symfony/Component/ClassLoader/ApcClassLoader.php
@@ -65,7 +65,7 @@ class ApcClassLoader
      */
     public function __construct($prefix, $decorated)
     {
-        if (!function_exists('apcu_fetch')) {
+        if (!\function_exists('apcu_fetch')) {
             throw new \RuntimeException('Unable to use ApcClassLoader as APC is not installed.');
         }
 
@@ -134,6 +134,6 @@ public function findFile($class)
      */
     public function __call($method, $args)
     {
-        return call_user_func_array(array($this->decorated, $method), $args);
+        return \call_user_func_array(array($this->decorated, $method), $args);
     }
 }
diff --git a/src/Symfony/Component/ClassLoader/ApcUniversalClassLoader.php b/src/Symfony/Component/ClassLoader/ApcUniversalClassLoader.php
index 9e5867b14594..bb3cea7e65b2 100644
--- a/src/Symfony/Component/ClassLoader/ApcUniversalClassLoader.php
+++ b/src/Symfony/Component/ClassLoader/ApcUniversalClassLoader.php
@@ -74,7 +74,7 @@ class ApcUniversalClassLoader extends UniversalClassLoader
      */
     public function __construct($prefix)
     {
-        if (!function_exists('apcu_fetch')) {
+        if (!\function_exists('apcu_fetch')) {
             throw new \RuntimeException('Unable to use ApcUniversalClassLoader as APC is not enabled.');
         }
 
diff --git a/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php b/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php
index ec2b075f663a..6319f1b86cc6 100644
--- a/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php
+++ b/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php
@@ -45,7 +45,7 @@ public static function load($classes, $cacheDir, $name, $autoReload, $adaptive =
 
         if ($adaptive) {
             $declared = array_merge(get_declared_classes(), get_declared_interfaces());
-            if (function_exists('get_declared_traits')) {
+            if (\function_exists('get_declared_traits')) {
                 $declared = array_merge($declared, get_declared_traits());
             }
 
@@ -99,7 +99,7 @@ public static function load($classes, $cacheDir, $name, $autoReload, $adaptive =
         }
         if (!$adaptive) {
             $declared = array_merge(get_declared_classes(), get_declared_interfaces());
-            if (function_exists('get_declared_traits')) {
+            if (\function_exists('get_declared_traits')) {
                 $declared = array_merge($declared, get_declared_traits());
             }
         }
@@ -118,7 +118,7 @@ public static function load($classes, $cacheDir, $name, $autoReload, $adaptive =
         $files = array();
         $content = '';
         foreach (self::getOrderedClasses($classes) as $class) {
-            if (in_array($class->getName(), $declared)) {
+            if (\in_array($class->getName(), $declared)) {
                 continue;
             }
 
@@ -136,8 +136,8 @@ public static function load($classes, $cacheDir, $name, $autoReload, $adaptive =
                 if (1 >= $i) {
                     $file = var_export(implode('/', $file), true);
                 } else {
-                    $file = array_slice($file, $i);
-                    $file = str_repeat('../', count($cacheDir) - $i).implode('/', $file);
+                    $file = \array_slice($file, $i);
+                    $file = str_repeat('../', \count($cacheDir) - $i).implode('/', $file);
                     $file = '__DIR__.'.var_export('/'.$file, true);
                 }
 
@@ -173,7 +173,7 @@ public static function load($classes, $cacheDir, $name, $autoReload, $adaptive =
      */
     public static function fixNamespaceDeclarations($source)
     {
-        if (!function_exists('token_get_all') || !self::$useTokenizer) {
+        if (!\function_exists('token_get_all') || !self::$useTokenizer) {
             if (preg_match('/(^|\s)namespace(.*?)\s*;/', $source)) {
                 $source = preg_replace('/(^|\s)namespace(.*?)\s*;/', "$1namespace$2\n{", $source)."}\n";
             }
@@ -190,7 +190,7 @@ public static function fixNamespaceDeclarations($source)
             $token = $tokens[$i];
             if (!isset($token[1]) || 'b"' === $token) {
                 $rawChunk .= $token;
-            } elseif (in_array($token[0], array(T_COMMENT, T_DOC_COMMENT))) {
+            } elseif (\in_array($token[0], array(T_COMMENT, T_DOC_COMMENT))) {
                 // strip comments
                 continue;
             } elseif (T_NAMESPACE === $token[0]) {
@@ -200,7 +200,7 @@ public static function fixNamespaceDeclarations($source)
                 $rawChunk .= $token[1];
 
                 // namespace name and whitespaces
-                while (isset($tokens[++$i][1]) && in_array($tokens[$i][0], array(T_WHITESPACE, T_NS_SEPARATOR, T_STRING))) {
+                while (isset($tokens[++$i][1]) && \in_array($tokens[$i][0], array(T_WHITESPACE, T_NS_SEPARATOR, T_STRING))) {
                     $rawChunk .= $tokens[$i][1];
                 }
                 if ('{' === $tokens[$i]) {
@@ -275,7 +275,7 @@ private static function compressCode($code)
      */
     private static function writeCacheFile($file, $content)
     {
-        $dir = dirname($file);
+        $dir = \dirname($file);
         if (!is_writable($dir)) {
             throw new \RuntimeException(sprintf('Cache directory "%s" is not writable.', $dir));
         }
diff --git a/src/Symfony/Component/ClassLoader/ClassLoader.php b/src/Symfony/Component/ClassLoader/ClassLoader.php
index a506dc094194..99789cd48705 100644
--- a/src/Symfony/Component/ClassLoader/ClassLoader.php
+++ b/src/Symfony/Component/ClassLoader/ClassLoader.php
@@ -91,12 +91,12 @@ public function addPrefix($prefix, $paths)
             return;
         }
         if (isset($this->prefixes[$prefix])) {
-            if (is_array($paths)) {
+            if (\is_array($paths)) {
                 $this->prefixes[$prefix] = array_unique(array_merge(
                     $this->prefixes[$prefix],
                     $paths
                 ));
-            } elseif (!in_array($paths, $this->prefixes[$prefix])) {
+            } elseif (!\in_array($paths, $this->prefixes[$prefix])) {
                 $this->prefixes[$prefix][] = $paths;
             }
         } else {
diff --git a/src/Symfony/Component/ClassLoader/ClassMapGenerator.php b/src/Symfony/Component/ClassLoader/ClassMapGenerator.php
index ab9762cd04e5..5a9c04d04496 100644
--- a/src/Symfony/Component/ClassLoader/ClassMapGenerator.php
+++ b/src/Symfony/Component/ClassLoader/ClassMapGenerator.php
@@ -11,11 +11,11 @@
 
 namespace Symfony\Component\ClassLoader;
 
-if (!defined('SYMFONY_TRAIT')) {
+if (!\defined('SYMFONY_TRAIT')) {
     if (\PHP_VERSION_ID >= 50400) {
-        define('SYMFONY_TRAIT', T_TRAIT);
+        \define('SYMFONY_TRAIT', T_TRAIT);
     } else {
-        define('SYMFONY_TRAIT', 0);
+        \define('SYMFONY_TRAIT', 0);
     }
 }
 
@@ -53,7 +53,7 @@ public static function dump($dirs, $file)
      */
     public static function createMap($dir)
     {
-        if (is_string($dir)) {
+        if (\is_string($dir)) {
             $dir = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($dir));
         }
 
@@ -114,7 +114,7 @@ private static function findClasses($path)
                     $namespace = '';
                     // If there is a namespace, extract it
                     while (isset($tokens[++$i][1])) {
-                        if (in_array($tokens[$i][0], array(T_STRING, T_NS_SEPARATOR))) {
+                        if (\in_array($tokens[$i][0], array(T_STRING, T_NS_SEPARATOR))) {
                             $namespace .= $tokens[$i][1];
                         }
                     }
@@ -133,7 +133,7 @@ private static function findClasses($path)
                         if (T_DOUBLE_COLON === $tokens[$j][0]) {
                             $isClassConstant = true;
                             break;
-                        } elseif (!in_array($tokens[$j][0], array(T_WHITESPACE, T_DOC_COMMENT, T_COMMENT))) {
+                        } elseif (!\in_array($tokens[$j][0], array(T_WHITESPACE, T_DOC_COMMENT, T_COMMENT))) {
                             break;
                         }
                     }
diff --git a/src/Symfony/Component/ClassLoader/DebugClassLoader.php b/src/Symfony/Component/ClassLoader/DebugClassLoader.php
index 277448aa9c13..610a32a7b39a 100644
--- a/src/Symfony/Component/ClassLoader/DebugClassLoader.php
+++ b/src/Symfony/Component/ClassLoader/DebugClassLoader.php
@@ -53,7 +53,7 @@ public function getClassLoader()
      */
     public static function enable()
     {
-        if (!is_array($functions = spl_autoload_functions())) {
+        if (!\is_array($functions = spl_autoload_functions())) {
             return;
         }
 
@@ -62,7 +62,7 @@ public static function enable()
         }
 
         foreach ($functions as $function) {
-            if (is_array($function) && !$function[0] instanceof self && method_exists($function[0], 'findFile')) {
+            if (\is_array($function) && !$function[0] instanceof self && method_exists($function[0], 'findFile')) {
                 $function = array(new static($function[0]), 'loadClass');
             }
 
@@ -104,7 +104,7 @@ public function loadClass($class)
         if ($file = $this->classFinder->findFile($class)) {
             require $file;
 
-            if (!class_exists($class, false) && !interface_exists($class, false) && (!function_exists('trait_exists') || !trait_exists($class, false))) {
+            if (!class_exists($class, false) && !interface_exists($class, false) && (!\function_exists('trait_exists') || !trait_exists($class, false))) {
                 if (false !== strpos($class, '/')) {
                     throw new \RuntimeException(sprintf('Trying to autoload a class with an invalid name "%s". Be careful that the namespace separator is "\" in PHP, not "/".', $class));
                 }
diff --git a/src/Symfony/Component/ClassLoader/DebugUniversalClassLoader.php b/src/Symfony/Component/ClassLoader/DebugUniversalClassLoader.php
index acb46cb580c7..259811358f33 100644
--- a/src/Symfony/Component/ClassLoader/DebugUniversalClassLoader.php
+++ b/src/Symfony/Component/ClassLoader/DebugUniversalClassLoader.php
@@ -28,7 +28,7 @@ class DebugUniversalClassLoader extends UniversalClassLoader
      */
     public static function enable()
     {
-        if (!is_array($functions = spl_autoload_functions())) {
+        if (!\is_array($functions = spl_autoload_functions())) {
             return;
         }
 
@@ -37,7 +37,7 @@ public static function enable()
         }
 
         foreach ($functions as $function) {
-            if (is_array($function) && $function[0] instanceof UniversalClassLoader) {
+            if (\is_array($function) && $function[0] instanceof UniversalClassLoader) {
                 $loader = new static();
                 $loader->registerNamespaceFallbacks($function[0]->getNamespaceFallbacks());
                 $loader->registerPrefixFallbacks($function[0]->getPrefixFallbacks());
@@ -60,7 +60,7 @@ public function loadClass($class)
         if ($file = $this->findFile($class)) {
             require $file;
 
-            if (!class_exists($class, false) && !interface_exists($class, false) && (!function_exists('trait_exists') || !trait_exists($class, false))) {
+            if (!class_exists($class, false) && !interface_exists($class, false) && (!\function_exists('trait_exists') || !trait_exists($class, false))) {
                 throw new \RuntimeException(sprintf('The autoloader expected class "%s" to be defined in file "%s". The file was found but the class was not in it, the class name or namespace probably has a typo.', $class, $file));
             }
         }
diff --git a/src/Symfony/Component/ClassLoader/Psr4ClassLoader.php b/src/Symfony/Component/ClassLoader/Psr4ClassLoader.php
index d9c4c3abbe27..e29b86d1cd8c 100644
--- a/src/Symfony/Component/ClassLoader/Psr4ClassLoader.php
+++ b/src/Symfony/Component/ClassLoader/Psr4ClassLoader.php
@@ -45,7 +45,7 @@ public function findFile($class)
         foreach ($this->prefixes as $current) {
             list($currentPrefix, $currentBaseDir) = $current;
             if (0 === strpos($class, $currentPrefix)) {
-                $classWithoutPrefix = substr($class, strlen($currentPrefix));
+                $classWithoutPrefix = substr($class, \strlen($currentPrefix));
                 $file = $currentBaseDir.str_replace('\\', DIRECTORY_SEPARATOR, $classWithoutPrefix).'.php';
                 if (file_exists($file)) {
                     return $file;
diff --git a/src/Symfony/Component/ClassLoader/Tests/ClassCollectionLoaderTest.php b/src/Symfony/Component/ClassLoader/Tests/ClassCollectionLoaderTest.php
index 4adff9fbfeda..5f37a0a519c8 100644
--- a/src/Symfony/Component/ClassLoader/Tests/ClassCollectionLoaderTest.php
+++ b/src/Symfony/Component/ClassLoader/Tests/ClassCollectionLoaderTest.php
@@ -233,7 +233,7 @@ public function testCommentStripping()
             }
         });
 
-        $strictTypes = defined('HHVM_VERSION') ? '' : "\nnamespace {require __DIR__.'/Fixtures/Namespaced/WithStrictTypes.php';}";
+        $strictTypes = \defined('HHVM_VERSION') ? '' : "\nnamespace {require __DIR__.'/Fixtures/Namespaced/WithStrictTypes.php';}";
 
         ClassCollectionLoader::load(
             array('Namespaced\\WithComments', 'Pearlike_WithComments', 'Namespaced\\WithDirMagic', 'Namespaced\\WithFileMagic', 'Namespaced\\WithHaltCompiler', $strictTypes ? 'Namespaced\\WithStrictTypes' : 'Namespaced\\WithComments'),
diff --git a/src/Symfony/Component/ClassLoader/WinCacheClassLoader.php b/src/Symfony/Component/ClassLoader/WinCacheClassLoader.php
index d5381b446b73..32f80a4f47e9 100644
--- a/src/Symfony/Component/ClassLoader/WinCacheClassLoader.php
+++ b/src/Symfony/Component/ClassLoader/WinCacheClassLoader.php
@@ -66,7 +66,7 @@ class WinCacheClassLoader
      */
     public function __construct($prefix, $decorated)
     {
-        if (!extension_loaded('wincache')) {
+        if (!\extension_loaded('wincache')) {
             throw new \RuntimeException('Unable to use WinCacheClassLoader as WinCache is not enabled.');
         }
 
@@ -135,6 +135,6 @@ public function findFile($class)
      */
     public function __call($method, $args)
     {
-        return call_user_func_array(array($this->decorated, $method), $args);
+        return \call_user_func_array(array($this->decorated, $method), $args);
     }
 }
diff --git a/src/Symfony/Component/ClassLoader/XcacheClassLoader.php b/src/Symfony/Component/ClassLoader/XcacheClassLoader.php
index b7210343f21a..b67c25db2ca9 100644
--- a/src/Symfony/Component/ClassLoader/XcacheClassLoader.php
+++ b/src/Symfony/Component/ClassLoader/XcacheClassLoader.php
@@ -60,7 +60,7 @@ class XcacheClassLoader
      */
     public function __construct($prefix, $decorated)
     {
-        if (!extension_loaded('xcache')) {
+        if (!\extension_loaded('xcache')) {
             throw new \RuntimeException('Unable to use XcacheClassLoader as XCache is not enabled.');
         }
 
@@ -130,6 +130,6 @@ public function findFile($class)
      */
     public function __call($method, $args)
     {
-        return call_user_func_array(array($this->decorated, $method), $args);
+        return \call_user_func_array(array($this->decorated, $method), $args);
     }
 }
diff --git a/src/Symfony/Component/Config/ConfigCacheFactory.php b/src/Symfony/Component/Config/ConfigCacheFactory.php
index 06dbe6c2947e..7903cca9321f 100644
--- a/src/Symfony/Component/Config/ConfigCacheFactory.php
+++ b/src/Symfony/Component/Config/ConfigCacheFactory.php
@@ -37,13 +37,13 @@ public function __construct($debug)
      */
     public function cache($file, $callback)
     {
-        if (!is_callable($callback)) {
-            throw new \InvalidArgumentException(sprintf('Invalid type for callback argument. Expected callable, but got "%s".', gettype($callback)));
+        if (!\is_callable($callback)) {
+            throw new \InvalidArgumentException(sprintf('Invalid type for callback argument. Expected callable, but got "%s".', \gettype($callback)));
         }
 
         $cache = new ConfigCache($file, $this->debug);
         if (!$cache->isFresh()) {
-            call_user_func($callback, $cache);
+            \call_user_func($callback, $cache);
         }
 
         return $cache;
diff --git a/src/Symfony/Component/Config/Definition/ArrayNode.php b/src/Symfony/Component/Config/Definition/ArrayNode.php
index 076cf5c69095..1ab4a3ae59e4 100644
--- a/src/Symfony/Component/Config/Definition/ArrayNode.php
+++ b/src/Symfony/Component/Config/Definition/ArrayNode.php
@@ -52,7 +52,7 @@ public function setNormalizeKeys($normalizeKeys)
      */
     protected function preNormalize($value)
     {
-        if (!$this->normalizeKeys || !is_array($value)) {
+        if (!$this->normalizeKeys || !\is_array($value)) {
             return $value;
         }
 
@@ -196,7 +196,7 @@ public function getDefaultValue()
     public function addChild(NodeInterface $node)
     {
         $name = $node->getName();
-        if (!strlen($name)) {
+        if (!\strlen($name)) {
             throw new \InvalidArgumentException('Child nodes must be named.');
         }
         if (isset($this->children[$name])) {
@@ -259,11 +259,11 @@ protected function finalizeValue($value)
      */
     protected function validateType($value)
     {
-        if (!is_array($value) && (!$this->allowFalse || false !== $value)) {
+        if (!\is_array($value) && (!$this->allowFalse || false !== $value)) {
             $ex = new InvalidTypeException(sprintf(
                 'Invalid type for path "%s". Expected array, but got %s',
                 $this->getPath(),
-                gettype($value)
+                \gettype($value)
             ));
             if ($hint = $this->getInfo()) {
                 $ex->addHint($hint);
@@ -302,8 +302,8 @@ protected function normalizeValue($value)
         }
 
         // if extra fields are present, throw exception
-        if (count($value) && !$this->ignoreExtraKeys) {
-            $msg = sprintf('Unrecognized option%s "%s" under "%s"', 1 === count($value) ? '' : 's', implode(', ', array_keys($value)), $this->getPath());
+        if (\count($value) && !$this->ignoreExtraKeys) {
+            $msg = sprintf('Unrecognized option%s "%s" under "%s"', 1 === \count($value) ? '' : 's', implode(', ', array_keys($value)), $this->getPath());
             $ex = new InvalidConfigurationException($msg);
             $ex->setPath($this->getPath());
 
diff --git a/src/Symfony/Component/Config/Definition/BooleanNode.php b/src/Symfony/Component/Config/Definition/BooleanNode.php
index 08e1a7730713..77e90cf7d624 100644
--- a/src/Symfony/Component/Config/Definition/BooleanNode.php
+++ b/src/Symfony/Component/Config/Definition/BooleanNode.php
@@ -25,11 +25,11 @@ class BooleanNode extends ScalarNode
      */
     protected function validateType($value)
     {
-        if (!is_bool($value)) {
+        if (!\is_bool($value)) {
             $ex = new InvalidTypeException(sprintf(
                 'Invalid type for path "%s". Expected boolean, but got %s.',
                 $this->getPath(),
-                gettype($value)
+                \gettype($value)
             ));
             if ($hint = $this->getInfo()) {
                 $ex->addHint($hint);
diff --git a/src/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php b/src/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php
index b2cb1b04003d..c15932efebe9 100644
--- a/src/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php
+++ b/src/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php
@@ -457,13 +457,13 @@ protected function validatePrototypeNode(PrototypedArrayNode $node)
                 );
             }
 
-            if (null !== $this->key && (null === $this->addDefaultChildren || is_int($this->addDefaultChildren) && $this->addDefaultChildren > 0)) {
+            if (null !== $this->key && (null === $this->addDefaultChildren || \is_int($this->addDefaultChildren) && $this->addDefaultChildren > 0)) {
                 throw new InvalidDefinitionException(
                     sprintf('->addDefaultChildrenIfNoneSet() should set default children names as ->useAttributeAsKey() is used at path "%s"', $path)
                 );
             }
 
-            if (null === $this->key && (is_string($this->addDefaultChildren) || is_array($this->addDefaultChildren))) {
+            if (null === $this->key && (\is_string($this->addDefaultChildren) || \is_array($this->addDefaultChildren))) {
                 throw new InvalidDefinitionException(
                     sprintf('->addDefaultChildrenIfNoneSet() might not set default children names as ->useAttributeAsKey() is not used at path "%s"', $path)
                 );
diff --git a/src/Symfony/Component/Config/Definition/Builder/ExprBuilder.php b/src/Symfony/Component/Config/Definition/Builder/ExprBuilder.php
index f83f1c209b03..fedbe0cc1bba 100644
--- a/src/Symfony/Component/Config/Definition/Builder/ExprBuilder.php
+++ b/src/Symfony/Component/Config/Definition/Builder/ExprBuilder.php
@@ -71,7 +71,7 @@ public function ifTrue(\Closure $closure = null)
      */
     public function ifString()
     {
-        $this->ifPart = function ($v) { return is_string($v); };
+        $this->ifPart = function ($v) { return \is_string($v); };
 
         return $this;
     }
@@ -95,7 +95,7 @@ public function ifNull()
      */
     public function ifArray()
     {
-        $this->ifPart = function ($v) { return is_array($v); };
+        $this->ifPart = function ($v) { return \is_array($v); };
 
         return $this;
     }
@@ -107,7 +107,7 @@ public function ifArray()
      */
     public function ifInArray(array $array)
     {
-        $this->ifPart = function ($v) use ($array) { return in_array($v, $array, true); };
+        $this->ifPart = function ($v) use ($array) { return \in_array($v, $array, true); };
 
         return $this;
     }
@@ -119,7 +119,7 @@ public function ifInArray(array $array)
      */
     public function ifNotInArray(array $array)
     {
-        $this->ifPart = function ($v) use ($array) { return !in_array($v, $array, true); };
+        $this->ifPart = function ($v) use ($array) { return !\in_array($v, $array, true); };
 
         return $this;
     }
diff --git a/src/Symfony/Component/Config/Definition/Dumper/XmlReferenceDumper.php b/src/Symfony/Component/Config/Definition/Dumper/XmlReferenceDumper.php
index 2cc71b344e35..0bf622369bc1 100644
--- a/src/Symfony/Component/Config/Definition/Dumper/XmlReferenceDumper.php
+++ b/src/Symfony/Component/Config/Definition/Dumper/XmlReferenceDumper.php
@@ -58,7 +58,7 @@ private function writeNode(NodeInterface $node, $depth = 0, $root = false, $name
                 return $rootName === $mapping[1];
             });
 
-            if (count($remapping)) {
+            if (\count($remapping)) {
                 list($singular) = current($remapping);
                 $rootName = $singular;
             }
@@ -102,7 +102,7 @@ private function writeNode(NodeInterface $node, $depth = 0, $root = false, $name
                     if ($prototype->hasDefaultValue()) {
                         $prototypeValue = $prototype->getDefaultValue();
                     } else {
-                        switch (get_class($prototype)) {
+                        switch (\get_class($prototype)) {
                             case 'Symfony\Component\Config\Definition\ScalarNode':
                                 $prototypeValue = 'scalar value';
                                 break;
@@ -154,7 +154,7 @@ private function writeNode(NodeInterface $node, $depth = 0, $root = false, $name
                         $comments[] = 'One of '.implode('; ', array_map('json_encode', $child->getValues()));
                     }
 
-                    if (count($comments)) {
+                    if (\count($comments)) {
                         $rootAttributeComments[$name] = implode(";\n", $comments);
                     }
 
@@ -175,18 +175,18 @@ private function writeNode(NodeInterface $node, $depth = 0, $root = false, $name
         // render comments
 
         // root node comment
-        if (count($rootComments)) {
+        if (\count($rootComments)) {
             foreach ($rootComments as $comment) {
                 $this->writeLine('<!-- '.$comment.' -->', $depth);
             }
         }
 
         // attribute comments
-        if (count($rootAttributeComments)) {
+        if (\count($rootAttributeComments)) {
             foreach ($rootAttributeComments as $attrName => $comment) {
-                $commentDepth = $depth + 4 + strlen($attrName) + 2;
+                $commentDepth = $depth + 4 + \strlen($attrName) + 2;
                 $commentLines = explode("\n", $comment);
-                $multiline = (count($commentLines) > 1);
+                $multiline = (\count($commentLines) > 1);
                 $comment = implode(PHP_EOL.str_repeat(' ', $commentDepth), $commentLines);
 
                 if ($multiline) {
@@ -201,9 +201,9 @@ private function writeNode(NodeInterface $node, $depth = 0, $root = false, $name
 
         // render start tag + attributes
         $rootIsVariablePrototype = isset($prototypeValue);
-        $rootIsEmptyTag = (0 === count($rootChildren) && !$rootIsVariablePrototype);
+        $rootIsEmptyTag = (0 === \count($rootChildren) && !$rootIsVariablePrototype);
         $rootOpenTag = '<'.$rootName;
-        if (1 >= ($attributesCount = count($rootAttributes))) {
+        if (1 >= ($attributesCount = \count($rootAttributes))) {
             if (1 === $attributesCount) {
                 $rootOpenTag .= sprintf(' %s="%s"', current(array_keys($rootAttributes)), $this->writeValue(current($rootAttributes)));
             }
@@ -258,7 +258,7 @@ private function writeNode(NodeInterface $node, $depth = 0, $root = false, $name
      */
     private function writeLine($text, $indent = 0)
     {
-        $indent = strlen($text) + $indent;
+        $indent = \strlen($text) + $indent;
         $format = '%'.$indent.'s';
 
         $this->reference .= sprintf($format, $text).PHP_EOL;
@@ -277,7 +277,7 @@ private function writeValue($value)
             return '';
         }
 
-        if (is_string($value) || is_numeric($value)) {
+        if (\is_string($value) || is_numeric($value)) {
             return $value;
         }
 
@@ -297,7 +297,7 @@ private function writeValue($value)
             return '';
         }
 
-        if (is_array($value)) {
+        if (\is_array($value)) {
             return implode(',', $value);
         }
     }
diff --git a/src/Symfony/Component/Config/Definition/Dumper/YamlReferenceDumper.php b/src/Symfony/Component/Config/Definition/Dumper/YamlReferenceDumper.php
index 01e158217b16..20ff453f93e4 100644
--- a/src/Symfony/Component/Config/Definition/Dumper/YamlReferenceDumper.php
+++ b/src/Symfony/Component/Config/Definition/Dumper/YamlReferenceDumper.php
@@ -85,9 +85,9 @@ private function writeNode(NodeInterface $node, $depth = 0)
             }
 
             if (!$children) {
-                if ($node->hasDefaultValue() && count($defaultArray = $node->getDefaultValue())) {
+                if ($node->hasDefaultValue() && \count($defaultArray = $node->getDefaultValue())) {
                     $default = '';
-                } elseif (!is_array($example)) {
+                } elseif (!\is_array($example)) {
                     $default = '[]';
                 }
             }
@@ -100,10 +100,10 @@ private function writeNode(NodeInterface $node, $depth = 0)
             if ($node->hasDefaultValue()) {
                 $default = $node->getDefaultValue();
 
-                if (is_array($default)) {
-                    if (count($defaultArray = $node->getDefaultValue())) {
+                if (\is_array($default)) {
+                    if (\count($defaultArray = $node->getDefaultValue())) {
                         $default = '';
-                    } elseif (!is_array($example)) {
+                    } elseif (!\is_array($example)) {
                         $default = '[]';
                     }
                 } else {
@@ -118,12 +118,12 @@ private function writeNode(NodeInterface $node, $depth = 0)
         }
 
         // example
-        if ($example && !is_array($example)) {
+        if ($example && !\is_array($example)) {
             $comments[] = 'Example: '.$example;
         }
 
         $default = '' != (string) $default ? ' '.$default : '';
-        $comments = count($comments) ? '# '.implode(', ', $comments) : '';
+        $comments = \count($comments) ? '# '.implode(', ', $comments) : '';
 
         $text = rtrim(sprintf('%-21s%s %s', $node->getName().':', $default, $comments), ' ');
 
@@ -140,17 +140,17 @@ private function writeNode(NodeInterface $node, $depth = 0)
         if ($defaultArray) {
             $this->writeLine('');
 
-            $message = count($defaultArray) > 1 ? 'Defaults' : 'Default';
+            $message = \count($defaultArray) > 1 ? 'Defaults' : 'Default';
 
             $this->writeLine('# '.$message.':', $depth * 4 + 4);
 
             $this->writeArray($defaultArray, $depth + 1);
         }
 
-        if (is_array($example)) {
+        if (\is_array($example)) {
             $this->writeLine('');
 
-            $message = count($example) > 1 ? 'Examples' : 'Example';
+            $message = \count($example) > 1 ? 'Examples' : 'Example';
 
             $this->writeLine('# '.$message.':', $depth * 4 + 4);
 
@@ -172,7 +172,7 @@ private function writeNode(NodeInterface $node, $depth = 0)
      */
     private function writeLine($text, $indent = 0)
     {
-        $indent = strlen($text) + $indent;
+        $indent = \strlen($text) + $indent;
         $format = '%'.$indent.'s';
 
         $this->reference .= sprintf($format, $text)."\n";
@@ -183,7 +183,7 @@ private function writeArray(array $array, $depth)
         $isIndexed = array_values($array) === $array;
 
         foreach ($array as $key => $value) {
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 $val = '';
             } else {
                 $val = $value;
@@ -195,7 +195,7 @@ private function writeArray(array $array, $depth)
                 $this->writeLine(sprintf('%-20s %s', $key.':', $val), $depth * 4);
             }
 
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 $this->writeArray($value, $depth + 1);
             }
         }
diff --git a/src/Symfony/Component/Config/Definition/EnumNode.php b/src/Symfony/Component/Config/Definition/EnumNode.php
index 9b4c4156e311..0cb40018b04f 100644
--- a/src/Symfony/Component/Config/Definition/EnumNode.php
+++ b/src/Symfony/Component/Config/Definition/EnumNode.php
@@ -42,7 +42,7 @@ protected function finalizeValue($value)
     {
         $value = parent::finalizeValue($value);
 
-        if (!in_array($value, $this->values, true)) {
+        if (!\in_array($value, $this->values, true)) {
             $ex = new InvalidConfigurationException(sprintf(
                 'The value %s is not allowed for path "%s". Permissible values: %s',
                 json_encode($value),
diff --git a/src/Symfony/Component/Config/Definition/FloatNode.php b/src/Symfony/Component/Config/Definition/FloatNode.php
index 5e1af17ada07..9eb8789950ec 100644
--- a/src/Symfony/Component/Config/Definition/FloatNode.php
+++ b/src/Symfony/Component/Config/Definition/FloatNode.php
@@ -26,12 +26,12 @@ class FloatNode extends NumericNode
     protected function validateType($value)
     {
         // Integers are also accepted, we just cast them
-        if (is_int($value)) {
+        if (\is_int($value)) {
             $value = (float) $value;
         }
 
-        if (!is_float($value)) {
-            $ex = new InvalidTypeException(sprintf('Invalid type for path "%s". Expected float, but got %s.', $this->getPath(), gettype($value)));
+        if (!\is_float($value)) {
+            $ex = new InvalidTypeException(sprintf('Invalid type for path "%s". Expected float, but got %s.', $this->getPath(), \gettype($value)));
             if ($hint = $this->getInfo()) {
                 $ex->addHint($hint);
             }
diff --git a/src/Symfony/Component/Config/Definition/IntegerNode.php b/src/Symfony/Component/Config/Definition/IntegerNode.php
index ba2307024cae..8ec068a84ecf 100644
--- a/src/Symfony/Component/Config/Definition/IntegerNode.php
+++ b/src/Symfony/Component/Config/Definition/IntegerNode.php
@@ -25,8 +25,8 @@ class IntegerNode extends NumericNode
      */
     protected function validateType($value)
     {
-        if (!is_int($value)) {
-            $ex = new InvalidTypeException(sprintf('Invalid type for path "%s". Expected int, but got %s.', $this->getPath(), gettype($value)));
+        if (!\is_int($value)) {
+            $ex = new InvalidTypeException(sprintf('Invalid type for path "%s". Expected int, but got %s.', $this->getPath(), \gettype($value)));
             if ($hint = $this->getInfo()) {
                 $ex->addHint($hint);
             }
diff --git a/src/Symfony/Component/Config/Definition/Processor.php b/src/Symfony/Component/Config/Definition/Processor.php
index 025e69378f94..3e0feab8693e 100644
--- a/src/Symfony/Component/Config/Definition/Processor.php
+++ b/src/Symfony/Component/Config/Definition/Processor.php
@@ -84,7 +84,7 @@ public static function normalizeConfig($config, $key, $plural = null)
         }
 
         if (isset($config[$key])) {
-            if (is_string($config[$key]) || !is_int(key($config[$key]))) {
+            if (\is_string($config[$key]) || !\is_int(key($config[$key]))) {
                 // only one
                 return  array($config[$key]);
             }
diff --git a/src/Symfony/Component/Config/Definition/PrototypedArrayNode.php b/src/Symfony/Component/Config/Definition/PrototypedArrayNode.php
index d377b73e6c80..f4ef23ccd089 100644
--- a/src/Symfony/Component/Config/Definition/PrototypedArrayNode.php
+++ b/src/Symfony/Component/Config/Definition/PrototypedArrayNode.php
@@ -94,7 +94,7 @@ public function getKeyAttribute()
      */
     public function setDefaultValue($value)
     {
-        if (!is_array($value)) {
+        if (!\is_array($value)) {
             throw new \InvalidArgumentException($this->getPath().': the default value of an array node has to be an array.');
         }
 
@@ -119,7 +119,7 @@ public function setAddChildrenIfNoneSet($children = array('defaults'))
         if (null === $children) {
             $this->defaultChildren = array('defaults');
         } else {
-            $this->defaultChildren = is_int($children) && $children > 0 ? range(1, $children) : (array) $children;
+            $this->defaultChildren = \is_int($children) && $children > 0 ? range(1, $children) : (array) $children;
         }
     }
 
@@ -198,7 +198,7 @@ protected function finalizeValue($value)
             }
         }
 
-        if (count($value) < $this->minNumberOfElements) {
+        if (\count($value) < $this->minNumberOfElements) {
             $msg = sprintf('The path "%s" should have at least %d element(s) defined.', $this->getPath(), $this->minNumberOfElements);
             $ex = new InvalidConfigurationException($msg);
             $ex->setPath($this->getPath());
@@ -227,11 +227,11 @@ protected function normalizeValue($value)
 
         $value = $this->remapXml($value);
 
-        $isAssoc = array_keys($value) !== range(0, count($value) - 1);
+        $isAssoc = array_keys($value) !== range(0, \count($value) - 1);
         $normalized = array();
         foreach ($value as $k => $v) {
-            if (null !== $this->keyAttribute && is_array($v)) {
-                if (!isset($v[$this->keyAttribute]) && is_int($k) && !$isAssoc) {
+            if (null !== $this->keyAttribute && \is_array($v)) {
+                if (!isset($v[$this->keyAttribute]) && \is_int($k) && !$isAssoc) {
                     $msg = sprintf('The attribute "%s" must be set for path "%s".', $this->keyAttribute, $this->getPath());
                     $ex = new InvalidConfigurationException($msg);
                     $ex->setPath($this->getPath());
@@ -252,9 +252,9 @@ protected function normalizeValue($value)
                             $valuePrototype = current($this->valuePrototypes) ?: clone $children['value'];
                             $valuePrototype->parent = $this;
                             $originalClosures = $this->prototype->normalizationClosures;
-                            if (is_array($originalClosures)) {
+                            if (\is_array($originalClosures)) {
                                 $valuePrototypeClosures = $valuePrototype->normalizationClosures;
-                                $valuePrototype->normalizationClosures = is_array($valuePrototypeClosures) ? array_merge($originalClosures, $valuePrototypeClosures) : $originalClosures;
+                                $valuePrototype->normalizationClosures = \is_array($valuePrototypeClosures) ? array_merge($originalClosures, $valuePrototypeClosures) : $originalClosures;
                             }
                             $this->valuePrototypes[$k] = $valuePrototype;
                         }
diff --git a/src/Symfony/Component/Config/Definition/ScalarNode.php b/src/Symfony/Component/Config/Definition/ScalarNode.php
index 6b3fd0b68fd2..e63f3f227f70 100644
--- a/src/Symfony/Component/Config/Definition/ScalarNode.php
+++ b/src/Symfony/Component/Config/Definition/ScalarNode.php
@@ -36,7 +36,7 @@ protected function validateType($value)
             $ex = new InvalidTypeException(sprintf(
                 'Invalid type for path "%s". Expected scalar, but got %s.',
                 $this->getPath(),
-                gettype($value)
+                \gettype($value)
             ));
             if ($hint = $this->getInfo()) {
                 $ex->addHint($hint);
diff --git a/src/Symfony/Component/Config/Exception/FileLoaderLoadException.php b/src/Symfony/Component/Config/Exception/FileLoaderLoadException.php
index 6af3dd0a6d61..9515dc481911 100644
--- a/src/Symfony/Component/Config/Exception/FileLoaderLoadException.php
+++ b/src/Symfony/Component/Config/Exception/FileLoaderLoadException.php
@@ -67,11 +67,11 @@ public function __construct($resource, $sourceResource = null, $code = null, $pr
 
     protected function varToString($var)
     {
-        if (is_object($var)) {
-            return sprintf('Object(%s)', get_class($var));
+        if (\is_object($var)) {
+            return sprintf('Object(%s)', \get_class($var));
         }
 
-        if (is_array($var)) {
+        if (\is_array($var)) {
             $a = array();
             foreach ($var as $k => $v) {
                 $a[] = sprintf('%s => %s', $k, $this->varToString($v));
@@ -80,7 +80,7 @@ protected function varToString($var)
             return sprintf('Array(%s)', implode(', ', $a));
         }
 
-        if (is_resource($var)) {
+        if (\is_resource($var)) {
             return sprintf('Resource(%s)', get_resource_type($var));
         }
 
diff --git a/src/Symfony/Component/Config/FileLocator.php b/src/Symfony/Component/Config/FileLocator.php
index 71fcf4023a68..29a28b15b8c7 100644
--- a/src/Symfony/Component/Config/FileLocator.php
+++ b/src/Symfony/Component/Config/FileLocator.php
@@ -80,7 +80,7 @@ public function locate($name, $currentPath = null, $first = true)
     private function isAbsolutePath($file)
     {
         if ('/' === $file[0] || '\\' === $file[0]
-            || (strlen($file) > 3 && ctype_alpha($file[0])
+            || (\strlen($file) > 3 && ctype_alpha($file[0])
                 && ':' === $file[1]
                 && ('\\' === $file[2] || '/' === $file[2])
             )
diff --git a/src/Symfony/Component/Config/Loader/FileLoader.php b/src/Symfony/Component/Config/Loader/FileLoader.php
index 5ea8a8984bc7..b5ca63d7f5c9 100644
--- a/src/Symfony/Component/Config/Loader/FileLoader.php
+++ b/src/Symfony/Component/Config/Loader/FileLoader.php
@@ -77,15 +77,15 @@ public function import($resource, $type = null, $ignoreErrors = false, $sourceRe
                 // @deprecated should be removed in 3.0
                 $locator = $loader->getLocator();
                 if (null === $locator) {
-                    @trigger_error('Not calling the parent constructor in '.get_class($loader).' which extends '.__CLASS__.' is deprecated since Symfony 2.7 and will not be supported anymore in 3.0.', E_USER_DEPRECATED);
+                    @trigger_error('Not calling the parent constructor in '.\get_class($loader).' which extends '.__CLASS__.' is deprecated since Symfony 2.7 and will not be supported anymore in 3.0.', E_USER_DEPRECATED);
                     $locator = $this->locator;
                 }
 
                 $resource = $locator->locate($resource, $this->currentDir, false);
             }
 
-            $resources = is_array($resource) ? $resource : array($resource);
-            for ($i = 0; $i < $resourcesCount = count($resources); ++$i) {
+            $resources = \is_array($resource) ? $resource : array($resource);
+            for ($i = 0; $i < $resourcesCount = \count($resources); ++$i) {
                 if (isset(self::$loading[$resources[$i]])) {
                     if ($i == $resourcesCount - 1) {
                         throw new FileLoaderImportCircularReferenceException(array_keys(self::$loading));
diff --git a/src/Symfony/Component/Config/Resource/BCResourceInterfaceChecker.php b/src/Symfony/Component/Config/Resource/BCResourceInterfaceChecker.php
index a245f724650f..64c93094aca9 100644
--- a/src/Symfony/Component/Config/Resource/BCResourceInterfaceChecker.php
+++ b/src/Symfony/Component/Config/Resource/BCResourceInterfaceChecker.php
@@ -29,7 +29,7 @@ public function supports(ResourceInterface $metadata)
 
     public function isFresh(ResourceInterface $resource, $timestamp)
     {
-        @trigger_error(sprintf('The class "%s" is performing resource checking through ResourceInterface::isFresh(), which is deprecated since Symfony 2.8 and will be removed in 3.0', get_class($resource)), E_USER_DEPRECATED);
+        @trigger_error(sprintf('The class "%s" is performing resource checking through ResourceInterface::isFresh(), which is deprecated since Symfony 2.8 and will be removed in 3.0', \get_class($resource)), E_USER_DEPRECATED);
 
         return parent::isFresh($resource, $timestamp); // For now, $metadata features the isFresh() method, so off we go (quack quack)
     }
diff --git a/src/Symfony/Component/Config/ResourceCheckerConfigCacheFactory.php b/src/Symfony/Component/Config/ResourceCheckerConfigCacheFactory.php
index 61d732cc1c45..586c5bf280c2 100644
--- a/src/Symfony/Component/Config/ResourceCheckerConfigCacheFactory.php
+++ b/src/Symfony/Component/Config/ResourceCheckerConfigCacheFactory.php
@@ -37,13 +37,13 @@ public function __construct(array $resourceCheckers = array())
      */
     public function cache($file, $callback)
     {
-        if (!is_callable($callback)) {
-            throw new \InvalidArgumentException(sprintf('Invalid type for callback argument. Expected callable, but got "%s".', gettype($callback)));
+        if (!\is_callable($callback)) {
+            throw new \InvalidArgumentException(sprintf('Invalid type for callback argument. Expected callable, but got "%s".', \gettype($callback)));
         }
 
         $cache = new ResourceCheckerConfigCache($file, $this->resourceCheckers);
         if (!$cache->isFresh()) {
-            call_user_func($callback, $cache);
+            \call_user_func($callback, $cache);
         }
 
         return $cache;
diff --git a/src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php
index 0b5565e0b379..5d945fa93413 100644
--- a/src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php
@@ -56,10 +56,10 @@ public function testIgnoreAndRemoveBehaviors($ignore, $remove, $expected, $messa
     {
         if ($expected instanceof \Exception) {
             if (method_exists($this, 'expectException')) {
-                $this->expectException(get_class($expected));
+                $this->expectException(\get_class($expected));
                 $this->expectExceptionMessage($expected->getMessage());
             } else {
-                $this->setExpectedException(get_class($expected), $expected->getMessage());
+                $this->setExpectedException(\get_class($expected), $expected->getMessage());
             }
         }
         $node = new ArrayNode('root');
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php
index 16a38c30b0f9..375ca71f3c8c 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php
@@ -43,7 +43,7 @@ public function testPrototypeNodeSpecificOption($method, $args)
     {
         $node = new ArrayNodeDefinition('root');
 
-        call_user_func_array(array($node, $method), $args);
+        \call_user_func_array(array($node, $method), $args);
 
         $node->getNode();
     }
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/NodeBuilderTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/NodeBuilderTest.php
index 88775656784f..cd77dd702bce 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/NodeBuilderTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/NodeBuilderTest.php
@@ -68,14 +68,14 @@ public function testNodeTypesAreNotCaseSensitive()
         $node1 = $builder->node('', 'VaRiAbLe');
         $node2 = $builder->node('', 'variable');
 
-        $this->assertInstanceOf(get_class($node1), $node2);
+        $this->assertInstanceOf(\get_class($node1), $node2);
 
         $builder->setNodeClass('CuStOm', __NAMESPACE__.'\\SomeNodeDefinition');
 
         $node1 = $builder->node('', 'CUSTOM');
         $node2 = $builder->node('', 'custom');
 
-        $this->assertInstanceOf(get_class($node1), $node2);
+        $this->assertInstanceOf(\get_class($node1), $node2);
     }
 
     public function testNumericNodeCreation()
diff --git a/src/Symfony/Component/Config/Tests/Loader/LoaderTest.php b/src/Symfony/Component/Config/Tests/Loader/LoaderTest.php
index fefb1d728f44..30167e3836f8 100644
--- a/src/Symfony/Component/Config/Tests/Loader/LoaderTest.php
+++ b/src/Symfony/Component/Config/Tests/Loader/LoaderTest.php
@@ -109,7 +109,7 @@ public function load($resource, $type = null)
 
     public function supports($resource, $type = null)
     {
-        return is_string($resource) && 'foo' === pathinfo($resource, PATHINFO_EXTENSION);
+        return \is_string($resource) && 'foo' === pathinfo($resource, PATHINFO_EXTENSION);
     }
 
     public function getType()
diff --git a/src/Symfony/Component/Config/Util/XmlUtils.php b/src/Symfony/Component/Config/Util/XmlUtils.php
index c7c315718022..5ecbd2efdc26 100644
--- a/src/Symfony/Component/Config/Util/XmlUtils.php
+++ b/src/Symfony/Component/Config/Util/XmlUtils.php
@@ -41,7 +41,7 @@ private function __construct()
      */
     public static function loadFile($file, $schemaOrCallable = null)
     {
-        if (!extension_loaded('dom')) {
+        if (!\extension_loaded('dom')) {
             throw new \RuntimeException('Extension DOM is required.');
         }
 
@@ -56,7 +56,7 @@ public static function loadFile($file, $schemaOrCallable = null)
 
         $dom = new \DOMDocument();
         $dom->validateOnParse = true;
-        if (!$dom->loadXML($content, LIBXML_NONET | (defined('LIBXML_COMPACT') ? LIBXML_COMPACT : 0))) {
+        if (!$dom->loadXML($content, LIBXML_NONET | (\defined('LIBXML_COMPACT') ? LIBXML_COMPACT : 0))) {
             libxml_disable_entity_loader($disableEntities);
 
             throw new \InvalidArgumentException(implode("\n", static::getXmlErrors($internalErrors)));
@@ -78,13 +78,13 @@ public static function loadFile($file, $schemaOrCallable = null)
             libxml_clear_errors();
 
             $e = null;
-            if (is_callable($schemaOrCallable)) {
+            if (\is_callable($schemaOrCallable)) {
                 try {
-                    $valid = call_user_func($schemaOrCallable, $dom, $internalErrors);
+                    $valid = \call_user_func($schemaOrCallable, $dom, $internalErrors);
                 } catch (\Exception $e) {
                     $valid = false;
                 }
-            } elseif (!is_array($schemaOrCallable) && is_file((string) $schemaOrCallable)) {
+            } elseif (!\is_array($schemaOrCallable) && is_file((string) $schemaOrCallable)) {
                 $schemaSource = file_get_contents((string) $schemaOrCallable);
                 $valid = @$dom->schemaValidateSource($schemaSource);
             } else {
@@ -134,7 +134,7 @@ public static function convertDomElementToArray(\DOMElement $element, $checkPref
         $empty = true;
         $config = array();
         foreach ($element->attributes as $name => $node) {
-            if ($checkPrefix && !in_array((string) $node->prefix, array('', $prefix), true)) {
+            if ($checkPrefix && !\in_array((string) $node->prefix, array('', $prefix), true)) {
                 continue;
             }
             $config[$name] = static::phpize($node->value);
@@ -155,7 +155,7 @@ public static function convertDomElementToArray(\DOMElement $element, $checkPref
 
                 $key = $node->localName;
                 if (isset($config[$key])) {
-                    if (!is_array($config[$key]) || !is_int(key($config[$key]))) {
+                    if (!\is_array($config[$key]) || !\is_int(key($config[$key]))) {
                         $config[$key] = array($config[$key]);
                     }
                     $config[$key][] = $value;
@@ -169,7 +169,7 @@ public static function convertDomElementToArray(\DOMElement $element, $checkPref
 
         if (false !== $nodeValue) {
             $value = static::phpize($nodeValue);
-            if (count($config)) {
+            if (\count($config)) {
                 $config['value'] = $value;
             } else {
                 $config = $value;
diff --git a/src/Symfony/Component/Console/Application.php b/src/Symfony/Component/Console/Application.php
index 4785200727d2..5cc3ee5074df 100644
--- a/src/Symfony/Component/Console/Application.php
+++ b/src/Symfony/Component/Console/Application.php
@@ -369,7 +369,7 @@ public function add(Command $command)
         }
 
         if (null === $command->getDefinition()) {
-            throw new LogicException(sprintf('Command class "%s" is not correctly initialized. You probably forgot to call the parent constructor.', get_class($command)));
+            throw new LogicException(sprintf('Command class "%s" is not correctly initialized. You probably forgot to call the parent constructor.', \get_class($command)));
         }
 
         $this->commands[$command->getName()] = $command;
@@ -466,7 +466,7 @@ public function findNamespace($namespace)
             $message = sprintf('There are no commands defined in the "%s" namespace.', $namespace);
 
             if ($alternatives = $this->findAlternatives($namespace, $allNamespaces)) {
-                if (1 == count($alternatives)) {
+                if (1 == \count($alternatives)) {
                     $message .= "\n\nDid you mean this?\n    ";
                 } else {
                     $message .= "\n\nDid you mean one of these?\n    ";
@@ -478,8 +478,8 @@ public function findNamespace($namespace)
             throw new CommandNotFoundException($message, $alternatives);
         }
 
-        $exact = in_array($namespace, $namespaces, true);
-        if (count($namespaces) > 1 && !$exact) {
+        $exact = \in_array($namespace, $namespaces, true);
+        if (\count($namespaces) > 1 && !$exact) {
             throw new CommandNotFoundException(sprintf('The namespace "%s" is ambiguous (%s).', $namespace, $this->getAbbreviationSuggestions(array_values($namespaces))), array_values($namespaces));
         }
 
@@ -506,7 +506,7 @@ public function find($name)
         $expr = preg_replace_callback('{([^:]+|)}', function ($matches) { return preg_quote($matches[1]).'[^:]*'; }, $name);
         $commands = preg_grep('{^'.$expr.'}', $allCommands);
 
-        if (empty($commands) || count(preg_grep('{^'.$expr.'$}', $commands)) < 1) {
+        if (empty($commands) || \count(preg_grep('{^'.$expr.'$}', $commands)) < 1) {
             if (false !== $pos = strrpos($name, ':')) {
                 // check if a namespace exists and contains commands
                 $this->findNamespace(substr($name, 0, $pos));
@@ -515,7 +515,7 @@ public function find($name)
             $message = sprintf('Command "%s" is not defined.', $name);
 
             if ($alternatives = $this->findAlternatives($name, $allCommands)) {
-                if (1 == count($alternatives)) {
+                if (1 == \count($alternatives)) {
                     $message .= "\n\nDid you mean this?\n    ";
                 } else {
                     $message .= "\n\nDid you mean one of these?\n    ";
@@ -527,18 +527,18 @@ public function find($name)
         }
 
         // filter out aliases for commands which are already on the list
-        if (count($commands) > 1) {
+        if (\count($commands) > 1) {
             $commandList = $this->commands;
             $commands = array_filter($commands, function ($nameOrAlias) use ($commandList, $commands, &$aliases) {
                 $commandName = $commandList[$nameOrAlias]->getName();
                 $aliases[$nameOrAlias] = $commandName;
 
-                return $commandName === $nameOrAlias || !in_array($commandName, $commands);
+                return $commandName === $nameOrAlias || !\in_array($commandName, $commands);
             });
         }
 
-        $exact = in_array($name, $commands, true) || isset($aliases[$name]);
-        if (!$exact && count($commands) > 1) {
+        $exact = \in_array($name, $commands, true) || isset($aliases[$name]);
+        if (!$exact && \count($commands) > 1) {
             $suggestions = $this->getAbbreviationSuggestions(array_values($commands));
 
             throw new CommandNotFoundException(sprintf('Command "%s" is ambiguous (%s).', $name, $suggestions), array_values($commands));
@@ -585,7 +585,7 @@ public static function getAbbreviations($names)
     {
         $abbrevs = array();
         foreach ($names as $name) {
-            for ($len = strlen($name); $len > 0; --$len) {
+            for ($len = \strlen($name); $len > 0; --$len) {
                 $abbrev = substr($name, 0, $len);
                 $abbrevs[$abbrev][] = $name;
             }
@@ -649,13 +649,13 @@ public function renderException($e, $output)
         $output->writeln('', OutputInterface::VERBOSITY_QUIET);
 
         do {
-            $title = sprintf('  [%s]  ', get_class($e));
+            $title = sprintf('  [%s]  ', \get_class($e));
 
             $len = Helper::strlen($title);
 
             $width = $this->getTerminalWidth() ? $this->getTerminalWidth() - 1 : PHP_INT_MAX;
             // HHVM only accepts 32 bits integer in str_split, even when PHP_INT_MAX is a 64 bit integer: https://github.com/facebook/hhvm/issues/1327
-            if (defined('HHVM_VERSION') && $width > 1 << 31) {
+            if (\defined('HHVM_VERSION') && $width > 1 << 31) {
                 $width = 1 << 31;
             }
             $lines = array();
@@ -692,7 +692,7 @@ public function renderException($e, $output)
                     'args' => array(),
                 ));
 
-                for ($i = 0, $count = count($trace); $i < $count; ++$i) {
+                for ($i = 0, $count = \count($trace); $i < $count; ++$i) {
                     $class = isset($trace[$i]['class']) ? $trace[$i]['class'] : '';
                     $type = isset($trace[$i]['type']) ? $trace[$i]['type'] : '';
                     $function = $trace[$i]['function'];
@@ -802,7 +802,7 @@ protected function configureIO(InputInterface $input, OutputInterface $output)
 
         if (true === $input->hasParameterOption(array('--no-interaction', '-n'))) {
             $input->setInteractive(false);
-        } elseif (function_exists('posix_isatty') && $this->getHelperSet()->has('question')) {
+        } elseif (\function_exists('posix_isatty') && $this->getHelperSet()->has('question')) {
             $inputStream = $this->getHelperSet()->get('question')->getInputStream();
             if (!@posix_isatty($inputStream) && false === getenv('SHELL_INTERACTIVE')) {
                 $input->setInteractive(false);
@@ -951,13 +951,13 @@ protected function getDefaultHelperSet()
      */
     private function getSttyColumns()
     {
-        if (!function_exists('proc_open')) {
+        if (!\function_exists('proc_open')) {
             return;
         }
 
         $descriptorspec = array(1 => array('pipe', 'w'), 2 => array('pipe', 'w'));
         $process = proc_open('stty -a | grep columns', $descriptorspec, $pipes, null, null, array('suppress_errors' => true));
-        if (is_resource($process)) {
+        if (\is_resource($process)) {
             $info = stream_get_contents($pipes[1]);
             fclose($pipes[1]);
             fclose($pipes[2]);
@@ -974,13 +974,13 @@ private function getSttyColumns()
      */
     private function getConsoleMode()
     {
-        if (!function_exists('proc_open')) {
+        if (!\function_exists('proc_open')) {
             return;
         }
 
         $descriptorspec = array(1 => array('pipe', 'w'), 2 => array('pipe', 'w'));
         $process = proc_open('mode CON', $descriptorspec, $pipes, null, null, array('suppress_errors' => true));
-        if (is_resource($process)) {
+        if (\is_resource($process)) {
             $info = stream_get_contents($pipes[1]);
             fclose($pipes[1]);
             fclose($pipes[2]);
@@ -1001,7 +1001,7 @@ private function getConsoleMode()
      */
     private function getAbbreviationSuggestions($abbrevs)
     {
-        return sprintf('%s, %s%s', $abbrevs[0], $abbrevs[1], count($abbrevs) > 2 ? sprintf(' and %d more', count($abbrevs) - 2) : '');
+        return sprintf('%s, %s%s', $abbrevs[0], $abbrevs[1], \count($abbrevs) > 2 ? sprintf(' and %d more', \count($abbrevs) - 2) : '');
     }
 
     /**
@@ -1019,7 +1019,7 @@ public function extractNamespace($name, $limit = null)
         $parts = explode(':', $name);
         array_pop($parts);
 
-        return implode(':', null === $limit ? $parts : array_slice($parts, 0, $limit));
+        return implode(':', null === $limit ? $parts : \array_slice($parts, 0, $limit));
     }
 
     /**
@@ -1052,7 +1052,7 @@ private function findAlternatives($name, $collection)
                 }
 
                 $lev = levenshtein($subname, $parts[$i]);
-                if ($lev <= strlen($subname) / 3 || '' !== $subname && false !== strpos($parts[$i], $subname)) {
+                if ($lev <= \strlen($subname) / 3 || '' !== $subname && false !== strpos($parts[$i], $subname)) {
                     $alternatives[$collectionName] = $exists ? $alternatives[$collectionName] + $lev : $lev;
                 } elseif ($exists) {
                     $alternatives[$collectionName] += $threshold;
@@ -1062,7 +1062,7 @@ private function findAlternatives($name, $collection)
 
         foreach ($collection as $item) {
             $lev = levenshtein($name, $item);
-            if ($lev <= strlen($name) / 3 || false !== strpos($item, $name)) {
+            if ($lev <= \strlen($name) / 3 || false !== strpos($item, $name)) {
                 $alternatives[$item] = isset($alternatives[$item]) ? $alternatives[$item] - $lev : $lev;
             }
         }
@@ -1106,7 +1106,7 @@ private function splitStringByWidth($string, $width)
             $line = $char;
         }
 
-        $lines[] = count($lines) ? str_pad($line, $width) : $line;
+        $lines[] = \count($lines) ? str_pad($line, $width) : $line;
 
         mb_convert_variables($encoding, 'utf8', $lines);
 
@@ -1127,7 +1127,7 @@ private function extractAllNamespaces($name)
         $namespaces = array();
 
         foreach ($parts as $part) {
-            if (count($namespaces)) {
+            if (\count($namespaces)) {
                 $namespaces[] = end($namespaces).':'.$part;
             } else {
                 $namespaces[] = $part;
diff --git a/src/Symfony/Component/Console/Command/Command.php b/src/Symfony/Component/Console/Command/Command.php
index ba93677715f4..aaba2f949f75 100644
--- a/src/Symfony/Component/Console/Command/Command.php
+++ b/src/Symfony/Component/Console/Command/Command.php
@@ -63,7 +63,7 @@ public function __construct($name = null)
         $this->configure();
 
         if (!$this->name) {
-            throw new LogicException(sprintf('The command defined in "%s" cannot have an empty name.', get_class($this)));
+            throw new LogicException(sprintf('The command defined in "%s" cannot have an empty name.', \get_class($this)));
         }
     }
 
@@ -207,7 +207,7 @@ public function run(InputInterface $input, OutputInterface $output)
         $this->initialize($input, $output);
 
         if (null !== $this->processTitle) {
-            if (function_exists('cli_set_process_title')) {
+            if (\function_exists('cli_set_process_title')) {
                 if (!@cli_set_process_title($this->processTitle)) {
                     if ('Darwin' === PHP_OS) {
                         $output->writeln('<comment>Running "cli_set_process_title" as an unprivileged user is not supported on MacOS.</comment>', OutputInterface::VERBOSITY_VERY_VERBOSE);
@@ -215,7 +215,7 @@ public function run(InputInterface $input, OutputInterface $output)
                         cli_set_process_title($this->processTitle);
                     }
                 }
-            } elseif (function_exists('setproctitle')) {
+            } elseif (\function_exists('setproctitle')) {
                 setproctitle($this->processTitle);
             } elseif (OutputInterface::VERBOSITY_VERY_VERBOSE === $output->getVerbosity()) {
                 $output->writeln('<comment>Install the proctitle PECL to be able to change the process title.</comment>');
@@ -236,7 +236,7 @@ public function run(InputInterface $input, OutputInterface $output)
         $input->validate();
 
         if ($this->code) {
-            $statusCode = call_user_func($this->code, $input, $output);
+            $statusCode = \call_user_func($this->code, $input, $output);
         } else {
             $statusCode = $this->execute($input, $output);
         }
@@ -260,7 +260,7 @@ public function run(InputInterface $input, OutputInterface $output)
      */
     public function setCode($code)
     {
-        if (!is_callable($code)) {
+        if (!\is_callable($code)) {
             throw new InvalidArgumentException('Invalid callable provided to Command::setCode.');
         }
 
@@ -524,7 +524,7 @@ public function getProcessedHelp()
      */
     public function setAliases($aliases)
     {
-        if (!is_array($aliases) && !$aliases instanceof \Traversable) {
+        if (!\is_array($aliases) && !$aliases instanceof \Traversable) {
             throw new InvalidArgumentException('$aliases must be an array or an instance of \Traversable');
         }
 
diff --git a/src/Symfony/Component/Console/Descriptor/Descriptor.php b/src/Symfony/Component/Console/Descriptor/Descriptor.php
index f5bc59e0c94f..36e4f1b81bba 100644
--- a/src/Symfony/Component/Console/Descriptor/Descriptor.php
+++ b/src/Symfony/Component/Console/Descriptor/Descriptor.php
@@ -55,7 +55,7 @@ public function describe(OutputInterface $output, $object, array $options = arra
                 $this->describeApplication($object, $options);
                 break;
             default:
-                throw new InvalidArgumentException(sprintf('Object of type "%s" is not describable.', get_class($object)));
+                throw new InvalidArgumentException(sprintf('Object of type "%s" is not describable.', \get_class($object)));
         }
     }
 
diff --git a/src/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php b/src/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php
index 76399cae7d40..d3cac8617d26 100644
--- a/src/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php
+++ b/src/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php
@@ -64,7 +64,7 @@ protected function describeInputOption(InputOption $option, array $options = arr
      */
     protected function describeInputDefinition(InputDefinition $definition, array $options = array())
     {
-        if ($showArguments = count($definition->getArguments()) > 0) {
+        if ($showArguments = \count($definition->getArguments()) > 0) {
             $this->write('### Arguments:');
             foreach ($definition->getArguments() as $argument) {
                 $this->write("\n\n");
@@ -72,7 +72,7 @@ protected function describeInputDefinition(InputDefinition $definition, array $o
             }
         }
 
-        if (count($definition->getOptions()) > 0) {
+        if (\count($definition->getOptions()) > 0) {
             if ($showArguments) {
                 $this->write("\n\n");
             }
diff --git a/src/Symfony/Component/Console/Descriptor/TextDescriptor.php b/src/Symfony/Component/Console/Descriptor/TextDescriptor.php
index 1d6432428c20..671cb86fc5f1 100644
--- a/src/Symfony/Component/Console/Descriptor/TextDescriptor.php
+++ b/src/Symfony/Component/Console/Descriptor/TextDescriptor.php
@@ -33,14 +33,14 @@ class TextDescriptor extends Descriptor
      */
     protected function describeInputArgument(InputArgument $argument, array $options = array())
     {
-        if (null !== $argument->getDefault() && (!is_array($argument->getDefault()) || count($argument->getDefault()))) {
+        if (null !== $argument->getDefault() && (!\is_array($argument->getDefault()) || \count($argument->getDefault()))) {
             $default = sprintf('<comment> [default: %s]</comment>', $this->formatDefaultValue($argument->getDefault()));
         } else {
             $default = '';
         }
 
         $totalWidth = isset($options['total_width']) ? $options['total_width'] : Helper::strlen($argument->getName());
-        $spacingWidth = $totalWidth - strlen($argument->getName());
+        $spacingWidth = $totalWidth - \strlen($argument->getName());
 
         $this->writeText(sprintf('  <info>%s</info>  %s%s%s',
             $argument->getName(),
@@ -56,7 +56,7 @@ protected function describeInputArgument(InputArgument $argument, array $options
      */
     protected function describeInputOption(InputOption $option, array $options = array())
     {
-        if ($option->acceptValue() && null !== $option->getDefault() && (!is_array($option->getDefault()) || count($option->getDefault()))) {
+        if ($option->acceptValue() && null !== $option->getDefault() && (!\is_array($option->getDefault()) || \count($option->getDefault()))) {
             $default = sprintf('<comment> [default: %s]</comment>', $this->formatDefaultValue($option->getDefault()));
         } else {
             $default = '';
@@ -117,7 +117,7 @@ protected function describeInputDefinition(InputDefinition $definition, array $o
 
             $this->writeText('<comment>Options:</comment>', $options);
             foreach ($definition->getOptions() as $option) {
-                if (strlen($option->getShortcut()) > 1) {
+                if (\strlen($option->getShortcut()) > 1) {
                     $laterOptions[] = $option;
                     continue;
                 }
@@ -241,11 +241,11 @@ private function formatDefaultValue($default)
             return 'INF';
         }
 
-        if (is_string($default)) {
+        if (\is_string($default)) {
             $default = OutputFormatter::escape($default);
-        } elseif (is_array($default)) {
+        } elseif (\is_array($default)) {
             foreach ($default as $key => $value) {
-                if (is_string($value)) {
+                if (\is_string($value)) {
                     $default[$key] = OutputFormatter::escape($value);
                 }
             }
@@ -287,7 +287,7 @@ private function calculateTotalWidthForOptions(array $options)
         $totalWidth = 0;
         foreach ($options as $option) {
             // "-" + shortcut + ", --" + name
-            $nameLength = 1 + max(strlen($option->getShortcut()), 1) + 4 + Helper::strlen($option->getName());
+            $nameLength = 1 + max(\strlen($option->getShortcut()), 1) + 4 + Helper::strlen($option->getName());
 
             if ($option->acceptValue()) {
                 $valueLength = 1 + Helper::strlen($option->getName()); // = + value
diff --git a/src/Symfony/Component/Console/Descriptor/XmlDescriptor.php b/src/Symfony/Component/Console/Descriptor/XmlDescriptor.php
index c42fa429dcf6..a0933f24dfc7 100644
--- a/src/Symfony/Component/Console/Descriptor/XmlDescriptor.php
+++ b/src/Symfony/Component/Console/Descriptor/XmlDescriptor.php
@@ -202,7 +202,7 @@ private function getInputArgumentDocument(InputArgument $argument)
         $descriptionXML->appendChild($dom->createTextNode($argument->getDescription()));
 
         $objectXML->appendChild($defaultsXML = $dom->createElement('defaults'));
-        $defaults = is_array($argument->getDefault()) ? $argument->getDefault() : (is_bool($argument->getDefault()) ? array(var_export($argument->getDefault(), true)) : ($argument->getDefault() ? array($argument->getDefault()) : array()));
+        $defaults = \is_array($argument->getDefault()) ? $argument->getDefault() : (\is_bool($argument->getDefault()) ? array(var_export($argument->getDefault(), true)) : ($argument->getDefault() ? array($argument->getDefault()) : array()));
         foreach ($defaults as $default) {
             $defaultsXML->appendChild($defaultXML = $dom->createElement('default'));
             $defaultXML->appendChild($dom->createTextNode($default));
@@ -234,7 +234,7 @@ private function getInputOptionDocument(InputOption $option)
         $descriptionXML->appendChild($dom->createTextNode($option->getDescription()));
 
         if ($option->acceptValue()) {
-            $defaults = is_array($option->getDefault()) ? $option->getDefault() : (is_bool($option->getDefault()) ? array(var_export($option->getDefault(), true)) : ($option->getDefault() ? array($option->getDefault()) : array()));
+            $defaults = \is_array($option->getDefault()) ? $option->getDefault() : (\is_bool($option->getDefault()) ? array(var_export($option->getDefault(), true)) : ($option->getDefault() ? array($option->getDefault()) : array()));
             $objectXML->appendChild($defaultsXML = $dom->createElement('defaults'));
 
             if (!empty($defaults)) {
diff --git a/src/Symfony/Component/Console/Formatter/OutputFormatter.php b/src/Symfony/Component/Console/Formatter/OutputFormatter.php
index e6e7d63b52b1..587f3d0f3825 100644
--- a/src/Symfony/Component/Console/Formatter/OutputFormatter.php
+++ b/src/Symfony/Component/Console/Formatter/OutputFormatter.php
@@ -50,10 +50,10 @@ public static function escape($text)
     public static function escapeTrailingBackslash($text)
     {
         if ('\\' === substr($text, -1)) {
-            $len = strlen($text);
+            $len = \strlen($text);
             $text = rtrim($text, '\\');
             $text = str_replace("\0", '', $text);
-            $text .= str_repeat("\0", $len - strlen($text));
+            $text .= str_repeat("\0", $len - \strlen($text));
         }
 
         return $text;
@@ -145,7 +145,7 @@ public function format($message)
 
             // add the text up to the next tag
             $output .= $this->applyCurrentStyle(substr($message, $offset, $pos - $offset));
-            $offset = $pos + strlen($text);
+            $offset = $pos + \strlen($text);
 
             // opening tag?
             if ($open = '/' != $text[1]) {
@@ -229,6 +229,6 @@ private function createStyleFromString($string)
      */
     private function applyCurrentStyle($text)
     {
-        return $this->isDecorated() && strlen($text) > 0 ? $this->styleStack->getCurrent()->apply($text) : $text;
+        return $this->isDecorated() && \strlen($text) > 0 ? $this->styleStack->getCurrent()->apply($text) : $text;
     }
 }
diff --git a/src/Symfony/Component/Console/Formatter/OutputFormatterStyle.php b/src/Symfony/Component/Console/Formatter/OutputFormatterStyle.php
index 7ada54f4c11b..1f4e0cad1d1e 100644
--- a/src/Symfony/Component/Console/Formatter/OutputFormatterStyle.php
+++ b/src/Symfony/Component/Console/Formatter/OutputFormatterStyle.php
@@ -69,7 +69,7 @@ public function __construct($foreground = null, $background = null, array $optio
         if (null !== $background) {
             $this->setBackground($background);
         }
-        if (count($options)) {
+        if (\count($options)) {
             $this->setOptions($options);
         }
     }
@@ -143,7 +143,7 @@ public function setOption($option)
             ));
         }
 
-        if (!in_array(static::$availableOptions[$option], $this->options)) {
+        if (!\in_array(static::$availableOptions[$option], $this->options)) {
             $this->options[] = static::$availableOptions[$option];
         }
     }
@@ -203,14 +203,14 @@ public function apply($text)
             $setCodes[] = $this->background['set'];
             $unsetCodes[] = $this->background['unset'];
         }
-        if (count($this->options)) {
+        if (\count($this->options)) {
             foreach ($this->options as $option) {
                 $setCodes[] = $option['set'];
                 $unsetCodes[] = $option['unset'];
             }
         }
 
-        if (0 === count($setCodes)) {
+        if (0 === \count($setCodes)) {
             return $text;
         }
 
diff --git a/src/Symfony/Component/Console/Formatter/OutputFormatterStyleStack.php b/src/Symfony/Component/Console/Formatter/OutputFormatterStyleStack.php
index bf0beb709ed1..9e7283c2f84c 100644
--- a/src/Symfony/Component/Console/Formatter/OutputFormatterStyleStack.php
+++ b/src/Symfony/Component/Console/Formatter/OutputFormatterStyleStack.php
@@ -66,7 +66,7 @@ public function pop(OutputFormatterStyleInterface $style = null)
 
         foreach (array_reverse($this->styles, true) as $index => $stackedStyle) {
             if ($style->apply('') === $stackedStyle->apply('')) {
-                $this->styles = array_slice($this->styles, 0, $index);
+                $this->styles = \array_slice($this->styles, 0, $index);
 
                 return $stackedStyle;
             }
@@ -86,7 +86,7 @@ public function getCurrent()
             return $this->emptyStyle;
         }
 
-        return $this->styles[count($this->styles) - 1];
+        return $this->styles[\count($this->styles) - 1];
     }
 
     /**
diff --git a/src/Symfony/Component/Console/Helper/DebugFormatterHelper.php b/src/Symfony/Component/Console/Helper/DebugFormatterHelper.php
index 1119b795c8b8..f5393edee3d9 100644
--- a/src/Symfony/Component/Console/Helper/DebugFormatterHelper.php
+++ b/src/Symfony/Component/Console/Helper/DebugFormatterHelper.php
@@ -35,7 +35,7 @@ class DebugFormatterHelper extends Helper
      */
     public function start($id, $message, $prefix = 'RUN')
     {
-        $this->started[$id] = array('border' => ++$this->count % count($this->colors));
+        $this->started[$id] = array('border' => ++$this->count % \count($this->colors));
 
         return sprintf("%s<bg=blue;fg=white> %s </> <fg=blue>%s</>\n", $this->getBorder($id), $prefix, $message);
     }
diff --git a/src/Symfony/Component/Console/Helper/DialogHelper.php b/src/Symfony/Component/Console/Helper/DialogHelper.php
index 49d57abe333f..a130d6881c6a 100644
--- a/src/Symfony/Component/Console/Helper/DialogHelper.php
+++ b/src/Symfony/Component/Console/Helper/DialogHelper.php
@@ -139,7 +139,7 @@ public function ask(OutputInterface $output, $question, $default = null, array $
             $i = 0;
             $ofs = -1;
             $matches = $autocomplete;
-            $numMatches = count($matches);
+            $numMatches = \count($matches);
 
             $sttyMode = shell_exec('stty -g');
 
@@ -164,7 +164,7 @@ public function ask(OutputInterface $output, $question, $default = null, array $
                     if (0 === $i) {
                         $ofs = -1;
                         $matches = $autocomplete;
-                        $numMatches = count($matches);
+                        $numMatches = \count($matches);
                     } else {
                         $numMatches = 0;
                     }
@@ -188,13 +188,13 @@ public function ask(OutputInterface $output, $question, $default = null, array $
                         $ofs += ('A' === $c[2]) ? -1 : 1;
                         $ofs = ($numMatches + $ofs) % $numMatches;
                     }
-                } elseif (ord($c) < 32) {
+                } elseif (\ord($c) < 32) {
                     if ("\t" === $c || "\n" === $c) {
                         if ($numMatches > 0 && -1 !== $ofs) {
                             $ret = $matches[$ofs];
                             // Echo out remaining chars for current match
                             $output->write(substr($ret, $i));
-                            $i = strlen($ret);
+                            $i = \strlen($ret);
                         }
 
                         if ("\n" === $c) {
@@ -216,7 +216,7 @@ public function ask(OutputInterface $output, $question, $default = null, array $
 
                     foreach ($autocomplete as $value) {
                         // If typed characters match the beginning chunk of value (e.g. [AcmeDe]moBundle)
-                        if (0 === strpos($value, $ret) && $i !== strlen($value)) {
+                        if (0 === strpos($value, $ret) && $i !== \strlen($value)) {
                             $matches[$numMatches++] = $value;
                         }
                     }
@@ -239,7 +239,7 @@ public function ask(OutputInterface $output, $question, $default = null, array $
             shell_exec(sprintf('stty %s', $sttyMode));
         }
 
-        return strlen($ret) > 0 ? $ret : $default;
+        return \strlen($ret) > 0 ? $ret : $default;
     }
 
     /**
@@ -256,7 +256,7 @@ public function ask(OutputInterface $output, $question, $default = null, array $
     public function askConfirmation(OutputInterface $output, $question, $default = true)
     {
         $answer = 'z';
-        while ($answer && !in_array(strtolower($answer[0]), array('y', 'n'))) {
+        while ($answer && !\in_array(strtolower($answer[0]), array('y', 'n'))) {
             $answer = $this->ask($output, $question);
         }
 
@@ -492,7 +492,7 @@ private function validateAttempts($interviewer, OutputInterface $output, $valida
             }
 
             try {
-                return call_user_func($validator, $interviewer());
+                return \call_user_func($validator, $interviewer());
             } catch (\Exception $e) {
             }
         }
diff --git a/src/Symfony/Component/Console/Helper/FormatterHelper.php b/src/Symfony/Component/Console/Helper/FormatterHelper.php
index ac736f982e5c..6f679241d17c 100644
--- a/src/Symfony/Component/Console/Helper/FormatterHelper.php
+++ b/src/Symfony/Component/Console/Helper/FormatterHelper.php
@@ -45,7 +45,7 @@ public function formatSection($section, $message, $style = 'info')
      */
     public function formatBlock($messages, $style, $large = false)
     {
-        if (!is_array($messages)) {
+        if (!\is_array($messages)) {
             $messages = array($messages);
         }
 
diff --git a/src/Symfony/Component/Console/Helper/Helper.php b/src/Symfony/Component/Console/Helper/Helper.php
index 2d52a0a6139a..f462efd91918 100644
--- a/src/Symfony/Component/Console/Helper/Helper.php
+++ b/src/Symfony/Component/Console/Helper/Helper.php
@@ -48,7 +48,7 @@ public function getHelperSet()
     public static function strlen($string)
     {
         if (false === $encoding = mb_detect_encoding($string, null, true)) {
-            return strlen($string);
+            return \strlen($string);
         }
 
         return mb_strwidth($string, $encoding);
@@ -71,9 +71,9 @@ public static function formatTime($secs)
         foreach ($timeFormats as $index => $format) {
             if ($secs >= $format[0]) {
                 if ((isset($timeFormats[$index + 1]) && $secs < $timeFormats[$index + 1][0])
-                    || $index == count($timeFormats) - 1
+                    || $index == \count($timeFormats) - 1
                 ) {
-                    if (2 == count($format)) {
+                    if (2 == \count($format)) {
                         return $format[1];
                     }
 
diff --git a/src/Symfony/Component/Console/Helper/HelperSet.php b/src/Symfony/Component/Console/Helper/HelperSet.php
index 0d975f610b2d..62cce81111b7 100644
--- a/src/Symfony/Component/Console/Helper/HelperSet.php
+++ b/src/Symfony/Component/Console/Helper/HelperSet.php
@@ -33,7 +33,7 @@ class HelperSet implements \IteratorAggregate
     public function __construct(array $helpers = array())
     {
         foreach ($helpers as $alias => $helper) {
-            $this->set($helper, is_int($alias) ? null : $alias);
+            $this->set($helper, \is_int($alias) ? null : $alias);
         }
     }
 
diff --git a/src/Symfony/Component/Console/Helper/ProcessHelper.php b/src/Symfony/Component/Console/Helper/ProcessHelper.php
index a811eb48e679..a150e5a423ae 100644
--- a/src/Symfony/Component/Console/Helper/ProcessHelper.php
+++ b/src/Symfony/Component/Console/Helper/ProcessHelper.php
@@ -44,7 +44,7 @@ public function run(OutputInterface $output, $cmd, $error = null, $callback = nu
 
         $formatter = $this->getHelperSet()->get('debug_formatter');
 
-        if (is_array($cmd)) {
+        if (\is_array($cmd)) {
             $process = ProcessBuilder::create($cmd)->getProcess();
         } elseif ($cmd instanceof Process) {
             $process = $cmd;
@@ -126,7 +126,7 @@ public function wrapCallback(OutputInterface $output, Process $process, $callbac
             $output->write($formatter->progress(spl_object_hash($process), $that->escapeString($buffer), Process::ERR === $type));
 
             if (null !== $callback) {
-                call_user_func($callback, $type, $buffer);
+                \call_user_func($callback, $type, $buffer);
             }
         };
     }
diff --git a/src/Symfony/Component/Console/Helper/ProgressBar.php b/src/Symfony/Component/Console/Helper/ProgressBar.php
index 94fd2397f481..2df2f99200cc 100644
--- a/src/Symfony/Component/Console/Helper/ProgressBar.php
+++ b/src/Symfony/Component/Console/Helper/ProgressBar.php
@@ -444,7 +444,7 @@ public function display()
         $messages = $this->messages;
         $this->overwrite(preg_replace_callback("{%([a-z\-_]+)(?:\:([^%]+))?%}i", function ($matches) use ($self, $output, $messages) {
             if ($formatter = $self::getPlaceholderFormatterDefinition($matches[1])) {
-                $text = call_user_func($formatter, $self, $output);
+                $text = \call_user_func($formatter, $self, $output);
             } elseif (isset($messages[$matches[1]])) {
                 $text = $messages[$matches[1]];
             } else {
diff --git a/src/Symfony/Component/Console/Helper/ProgressHelper.php b/src/Symfony/Component/Console/Helper/ProgressHelper.php
index 1edcf170a654..4ef5459d3612 100644
--- a/src/Symfony/Component/Console/Helper/ProgressHelper.php
+++ b/src/Symfony/Component/Console/Helper/ProgressHelper.php
@@ -424,7 +424,7 @@ private function humaneTime($secs)
         $text = '';
         foreach ($this->timeFormats as $format) {
             if ($secs < $format[0]) {
-                if (2 == count($format)) {
+                if (2 == \count($format)) {
                     $text = $format[1];
                     break;
                 } else {
diff --git a/src/Symfony/Component/Console/Helper/ProgressIndicator.php b/src/Symfony/Component/Console/Helper/ProgressIndicator.php
index 2e43bc3f5a3b..21c4800cff8d 100644
--- a/src/Symfony/Component/Console/Helper/ProgressIndicator.php
+++ b/src/Symfony/Component/Console/Helper/ProgressIndicator.php
@@ -53,7 +53,7 @@ public function __construct(OutputInterface $output, $format = null, $indicatorC
 
         $indicatorValues = array_values($indicatorValues);
 
-        if (2 > count($indicatorValues)) {
+        if (2 > \count($indicatorValues)) {
             throw new InvalidArgumentException('Must have at least 2 indicator value characters.');
         }
 
@@ -108,7 +108,7 @@ public function getStartTime()
      */
     public function getCurrentValue()
     {
-        return $this->indicatorValues[$this->indicatorCurrent % count($this->indicatorValues)];
+        return $this->indicatorValues[$this->indicatorCurrent % \count($this->indicatorValues)];
     }
 
     /**
@@ -232,7 +232,7 @@ private function display()
 
         $this->overwrite(preg_replace_callback("{%([a-z\-_]+)(?:\:([^%]+))?%}i", function ($matches) use ($self) {
             if ($formatter = $self::getPlaceholderFormatterDefinition($matches[1])) {
-                return call_user_func($formatter, $self);
+                return \call_user_func($formatter, $self);
             }
 
             return $matches[0];
diff --git a/src/Symfony/Component/Console/Helper/QuestionHelper.php b/src/Symfony/Component/Console/Helper/QuestionHelper.php
index 4b215b764f1a..fd9b84e86cb7 100644
--- a/src/Symfony/Component/Console/Helper/QuestionHelper.php
+++ b/src/Symfony/Component/Console/Helper/QuestionHelper.php
@@ -79,7 +79,7 @@ public function ask(InputInterface $input, OutputInterface $output, Question $qu
      */
     public function setInputStream($stream)
     {
-        if (!is_resource($stream)) {
+        if (!\is_resource($stream)) {
             throw new InvalidArgumentException('Input stream must be a valid resource.');
         }
 
@@ -140,10 +140,10 @@ public function doAsk(OutputInterface $output, Question $question)
                 $ret = trim($ret);
             }
         } else {
-            $ret = trim($this->autocomplete($output, $question, $inputStream, is_array($autocomplete) ? $autocomplete : iterator_to_array($autocomplete, false)));
+            $ret = trim($this->autocomplete($output, $question, $inputStream, \is_array($autocomplete) ? $autocomplete : iterator_to_array($autocomplete, false)));
         }
 
-        $ret = strlen($ret) > 0 ? $ret : $question->getDefault();
+        $ret = \strlen($ret) > 0 ? $ret : $question->getDefault();
 
         if ($normalizer = $question->getNormalizer()) {
             return $normalizer($ret);
@@ -207,7 +207,7 @@ private function autocomplete(OutputInterface $output, Question $question, $inpu
         $i = 0;
         $ofs = -1;
         $matches = $autocomplete;
-        $numMatches = count($matches);
+        $numMatches = \count($matches);
 
         $sttyMode = shell_exec('stty -g');
 
@@ -232,7 +232,7 @@ private function autocomplete(OutputInterface $output, Question $question, $inpu
                 if (0 === $i) {
                     $ofs = -1;
                     $matches = $autocomplete;
-                    $numMatches = count($matches);
+                    $numMatches = \count($matches);
                 } else {
                     $numMatches = 0;
                 }
@@ -256,13 +256,13 @@ private function autocomplete(OutputInterface $output, Question $question, $inpu
                     $ofs += ('A' === $c[2]) ? -1 : 1;
                     $ofs = ($numMatches + $ofs) % $numMatches;
                 }
-            } elseif (ord($c) < 32) {
+            } elseif (\ord($c) < 32) {
                 if ("\t" === $c || "\n" === $c) {
                     if ($numMatches > 0 && -1 !== $ofs) {
                         $ret = $matches[$ofs];
                         // Echo out remaining chars for current match
                         $output->write(substr($ret, $i));
-                        $i = strlen($ret);
+                        $i = \strlen($ret);
                     }
 
                     if ("\n" === $c) {
@@ -391,7 +391,7 @@ private function validateAttempts($interviewer, OutputInterface $output, Questio
             }
 
             try {
-                return call_user_func($question->getValidator(), $interviewer());
+                return \call_user_func($question->getValidator(), $interviewer());
             } catch (RuntimeException $e) {
                 throw $e;
             } catch (\Exception $error) {
diff --git a/src/Symfony/Component/Console/Helper/SymfonyQuestionHelper.php b/src/Symfony/Component/Console/Helper/SymfonyQuestionHelper.php
index 25e094a04f45..edc64e8de90f 100644
--- a/src/Symfony/Component/Console/Helper/SymfonyQuestionHelper.php
+++ b/src/Symfony/Component/Console/Helper/SymfonyQuestionHelper.php
@@ -38,7 +38,7 @@ public function ask(InputInterface $input, OutputInterface $output, Question $qu
                 $value = $validator($value);
             } else {
                 // make required
-                if (!is_array($value) && !is_bool($value) && 0 === strlen($value)) {
+                if (!\is_array($value) && !\is_bool($value) && 0 === \strlen($value)) {
                     throw new LogicException('A value is required.');
                 }
             }
diff --git a/src/Symfony/Component/Console/Helper/Table.php b/src/Symfony/Component/Console/Helper/Table.php
index 1036faa48b58..e4e0bcc71904 100644
--- a/src/Symfony/Component/Console/Helper/Table.php
+++ b/src/Symfony/Component/Console/Helper/Table.php
@@ -171,7 +171,7 @@ public function getColumnStyle($columnIndex)
     public function setHeaders(array $headers)
     {
         $headers = array_values($headers);
-        if (!empty($headers) && !is_array($headers[0])) {
+        if (!empty($headers) && !\is_array($headers[0])) {
             $headers = array($headers);
         }
 
@@ -204,7 +204,7 @@ public function addRow($row)
             return $this;
         }
 
-        if (!is_array($row)) {
+        if (!\is_array($row)) {
             throw new InvalidArgumentException('A row must be an array or a TableSeparator instance.');
         }
 
@@ -336,7 +336,7 @@ private function renderCell(array $row, $column, $cellFormat)
 
         // str_pad won't work properly with multi-byte strings, we need to fix the padding
         if (false !== $encoding = mb_detect_encoding($cell, null, true)) {
-            $width += strlen($cell) - mb_strwidth($cell, $encoding);
+            $width += \strlen($cell) - mb_strwidth($cell, $encoding);
         }
 
         $style = $this->getColumnStyle($column);
@@ -375,7 +375,7 @@ private function calculateNumberOfColumns()
     private function buildTableRows($rows)
     {
         $unmergedRows = array();
-        for ($rowKey = 0; $rowKey < count($rows); ++$rowKey) {
+        for ($rowKey = 0; $rowKey < \count($rows); ++$rowKey) {
             $rows = $this->fillNextRows($rows, $rowKey);
 
             // Remove any new line breaks and replace it with a new line
@@ -425,7 +425,7 @@ private function fillNextRows(array $rows, $line)
                 $lines = array($cell);
                 if (strstr($cell, "\n")) {
                     $lines = explode("\n", str_replace("\n", "<fg=default;bg=default>\n</>", $cell));
-                    $nbLines = count($lines) > $nbLines ? substr_count($cell, "\n") : $nbLines;
+                    $nbLines = \count($lines) > $nbLines ? substr_count($cell, "\n") : $nbLines;
 
                     $rows[$line][$column] = new TableCell($lines[0], array('colspan' => $cell->getColspan()));
                     unset($lines[0]);
@@ -445,7 +445,7 @@ private function fillNextRows(array $rows, $line)
 
         foreach ($unmergedRows as $unmergedRowKey => $unmergedRow) {
             // we need to know if $unmergedRow will be merged or inserted into $rows
-            if (isset($rows[$unmergedRowKey]) && is_array($rows[$unmergedRowKey]) && ($this->getNumberOfColumns($rows[$unmergedRowKey]) + $this->getNumberOfColumns($unmergedRows[$unmergedRowKey]) <= $this->numberOfColumns)) {
+            if (isset($rows[$unmergedRowKey]) && \is_array($rows[$unmergedRowKey]) && ($this->getNumberOfColumns($rows[$unmergedRowKey]) + $this->getNumberOfColumns($unmergedRows[$unmergedRowKey]) <= $this->numberOfColumns)) {
                 foreach ($unmergedRow as $cellKey => $cell) {
                     // insert cell into row at cellKey position
                     array_splice($rows[$unmergedRowKey], $cellKey, 0, array($cell));
@@ -511,7 +511,7 @@ private function copyRow(array $rows, $line)
      */
     private function getNumberOfColumns(array $row)
     {
-        $columns = count($row);
+        $columns = \count($row);
         foreach ($row as $column) {
             $columns += $column instanceof TableCell ? ($column->getColspan() - 1) : 0;
         }
@@ -567,7 +567,7 @@ private function calculateColumnsWidth($rows)
                 $lengths[] = $this->getCellWidth($row, $column);
             }
 
-            $this->columnWidths[$column] = max($lengths) + strlen($this->style->getCellRowContentFormat()) - 2;
+            $this->columnWidths[$column] = max($lengths) + \strlen($this->style->getCellRowContentFormat()) - 2;
         }
     }
 
@@ -578,7 +578,7 @@ private function calculateColumnsWidth($rows)
      */
     private function getColumnSeparatorWidth()
     {
-        return strlen(sprintf($this->style->getBorderFormat(), $this->style->getVerticalBorderChar()));
+        return \strlen(sprintf($this->style->getBorderFormat(), $this->style->getVerticalBorderChar()));
     }
 
     /**
diff --git a/src/Symfony/Component/Console/Helper/TableCell.php b/src/Symfony/Component/Console/Helper/TableCell.php
index 6fc7d3b913b6..fb6c9fd37e1c 100644
--- a/src/Symfony/Component/Console/Helper/TableCell.php
+++ b/src/Symfony/Component/Console/Helper/TableCell.php
@@ -30,7 +30,7 @@ class TableCell
      */
     public function __construct($value = '', array $options = array())
     {
-        if (is_numeric($value) && !is_string($value)) {
+        if (is_numeric($value) && !\is_string($value)) {
             $value = (string) $value;
         }
 
diff --git a/src/Symfony/Component/Console/Helper/TableStyle.php b/src/Symfony/Component/Console/Helper/TableStyle.php
index 2999c76f86ad..117e311ebe95 100644
--- a/src/Symfony/Component/Console/Helper/TableStyle.php
+++ b/src/Symfony/Component/Console/Helper/TableStyle.php
@@ -237,7 +237,7 @@ public function getBorderFormat()
      */
     public function setPadType($padType)
     {
-        if (!in_array($padType, array(STR_PAD_LEFT, STR_PAD_RIGHT, STR_PAD_BOTH), true)) {
+        if (!\in_array($padType, array(STR_PAD_LEFT, STR_PAD_RIGHT, STR_PAD_BOTH), true)) {
             throw new InvalidArgumentException('Invalid padding type. Expected one of (STR_PAD_LEFT, STR_PAD_RIGHT, STR_PAD_BOTH).');
         }
 
diff --git a/src/Symfony/Component/Console/Input/ArgvInput.php b/src/Symfony/Component/Console/Input/ArgvInput.php
index 42147fef9cfe..741c734c723f 100644
--- a/src/Symfony/Component/Console/Input/ArgvInput.php
+++ b/src/Symfony/Component/Console/Input/ArgvInput.php
@@ -97,7 +97,7 @@ private function parseShortOption($token)
     {
         $name = substr($token, 1);
 
-        if (strlen($name) > 1) {
+        if (\strlen($name) > 1) {
             if ($this->definition->hasShortcut($name[0]) && $this->definition->getOptionForShortcut($name[0])->acceptValue()) {
                 // an option with a value (with no space)
                 $this->addShortOption($name[0], substr($name, 1));
@@ -118,7 +118,7 @@ private function parseShortOption($token)
      */
     private function parseShortOptionSet($name)
     {
-        $len = strlen($name);
+        $len = \strlen($name);
         for ($i = 0; $i < $len; ++$i) {
             if (!$this->definition->hasShortcut($name[$i])) {
                 throw new RuntimeException(sprintf('The "-%s" option does not exist.', $name[$i]));
@@ -145,7 +145,7 @@ private function parseLongOption($token)
         $name = substr($token, 2);
 
         if (false !== $pos = strpos($name, '=')) {
-            if (0 === strlen($value = substr($name, $pos + 1))) {
+            if (0 === \strlen($value = substr($name, $pos + 1))) {
                 array_unshift($this->parsed, null);
             }
             $this->addLongOption(substr($name, 0, $pos), $value);
@@ -163,7 +163,7 @@ private function parseLongOption($token)
      */
     private function parseArgument($token)
     {
-        $c = count($this->arguments);
+        $c = \count($this->arguments);
 
         // if input is expecting another argument, add it
         if ($this->definition->hasArgument($c)) {
@@ -178,7 +178,7 @@ private function parseArgument($token)
         // unexpected argument
         } else {
             $all = $this->definition->getArguments();
-            if (count($all)) {
+            if (\count($all)) {
                 throw new RuntimeException(sprintf('Too many arguments, expected arguments "%s".', implode('" "', array_keys($all))));
             }
 
@@ -228,7 +228,7 @@ private function addLongOption($name, $value)
             throw new RuntimeException(sprintf('The "--%s" option does not accept a value.', $name));
         }
 
-        if (null === $value && $option->acceptValue() && count($this->parsed)) {
+        if (null === $value && $option->acceptValue() && \count($this->parsed)) {
             // if option accepts an optional or mandatory argument
             // let's see if there is one provided
             $next = array_shift($this->parsed);
@@ -302,7 +302,7 @@ public function getParameterOption($values, $default = false)
         $values = (array) $values;
         $tokens = $this->tokens;
 
-        while (0 < count($tokens)) {
+        while (0 < \count($tokens)) {
             $token = array_shift($tokens);
 
             foreach ($values as $value) {
@@ -314,7 +314,7 @@ public function getParameterOption($values, $default = false)
                 //   For short options, test for '-o' at beginning
                 $leading = 0 === strpos($value, '--') ? $value.'=' : $value;
                 if ('' !== $leading && 0 === strpos($token, $leading)) {
-                    return substr($token, strlen($leading));
+                    return substr($token, \strlen($leading));
                 }
             }
         }
diff --git a/src/Symfony/Component/Console/Input/ArrayInput.php b/src/Symfony/Component/Console/Input/ArrayInput.php
index 2d69a964af3e..4f9360527d1f 100644
--- a/src/Symfony/Component/Console/Input/ArrayInput.php
+++ b/src/Symfony/Component/Console/Input/ArrayInput.php
@@ -56,11 +56,11 @@ public function hasParameterOption($values)
         $values = (array) $values;
 
         foreach ($this->parameters as $k => $v) {
-            if (!is_int($k)) {
+            if (!\is_int($k)) {
                 $v = $k;
             }
 
-            if (in_array($v, $values)) {
+            if (\in_array($v, $values)) {
                 return true;
             }
         }
@@ -76,11 +76,11 @@ public function getParameterOption($values, $default = false)
         $values = (array) $values;
 
         foreach ($this->parameters as $k => $v) {
-            if (is_int($k)) {
-                if (in_array($v, $values)) {
+            if (\is_int($k)) {
+                if (\in_array($v, $values)) {
                     return true;
                 }
-            } elseif (in_array($k, $values)) {
+            } elseif (\in_array($k, $values)) {
                 return $v;
             }
         }
@@ -98,7 +98,7 @@ public function __toString()
         $params = array();
         foreach ($this->parameters as $param => $val) {
             if ($param && '-' === $param[0]) {
-                if (is_array($val)) {
+                if (\is_array($val)) {
                     foreach ($val as $v) {
                         $params[] = $param.('' != $v ? '='.$this->escapeToken($v) : '');
                     }
@@ -106,7 +106,7 @@ public function __toString()
                     $params[] = $param.('' != $val ? '='.$this->escapeToken($val) : '');
                 }
             } else {
-                $params[] = is_array($val) ? implode(' ', array_map(array($this, 'escapeToken'), $val)) : $this->escapeToken($val);
+                $params[] = \is_array($val) ? implode(' ', array_map(array($this, 'escapeToken'), $val)) : $this->escapeToken($val);
             }
         }
 
diff --git a/src/Symfony/Component/Console/Input/Input.php b/src/Symfony/Component/Console/Input/Input.php
index 82aab1fac992..1c1e2fbd5581 100644
--- a/src/Symfony/Component/Console/Input/Input.php
+++ b/src/Symfony/Component/Console/Input/Input.php
@@ -71,7 +71,7 @@ public function validate()
             return !array_key_exists($argument, $givenArguments) && $definition->getArgument($argument)->isRequired();
         });
 
-        if (count($missingArguments) > 0) {
+        if (\count($missingArguments) > 0) {
             throw new RuntimeException(sprintf('Not enough arguments (missing: "%s").', implode(', ', $missingArguments)));
         }
     }
diff --git a/src/Symfony/Component/Console/Input/InputArgument.php b/src/Symfony/Component/Console/Input/InputArgument.php
index a969d2c5adc0..d4c5e35627ab 100644
--- a/src/Symfony/Component/Console/Input/InputArgument.php
+++ b/src/Symfony/Component/Console/Input/InputArgument.php
@@ -42,7 +42,7 @@ public function __construct($name, $mode = null, $description = '', $default = n
     {
         if (null === $mode) {
             $mode = self::OPTIONAL;
-        } elseif (!is_int($mode) || $mode > 7 || $mode < 1) {
+        } elseif (!\is_int($mode) || $mode > 7 || $mode < 1) {
             throw new InvalidArgumentException(sprintf('Argument mode "%s" is not valid.', $mode));
         }
 
@@ -99,7 +99,7 @@ public function setDefault($default = null)
         if ($this->isArray()) {
             if (null === $default) {
                 $default = array();
-            } elseif (!is_array($default)) {
+            } elseif (!\is_array($default)) {
                 throw new LogicException('A default value for an array argument must be an array.');
             }
         }
diff --git a/src/Symfony/Component/Console/Input/InputDefinition.php b/src/Symfony/Component/Console/Input/InputDefinition.php
index 411a2a7df559..89526f80d933 100644
--- a/src/Symfony/Component/Console/Input/InputDefinition.php
+++ b/src/Symfony/Component/Console/Input/InputDefinition.php
@@ -138,7 +138,7 @@ public function getArgument($name)
             throw new InvalidArgumentException(sprintf('The "%s" argument does not exist.', $name));
         }
 
-        $arguments = is_int($name) ? array_values($this->arguments) : $this->arguments;
+        $arguments = \is_int($name) ? array_values($this->arguments) : $this->arguments;
 
         return $arguments[$name];
     }
@@ -152,7 +152,7 @@ public function getArgument($name)
      */
     public function hasArgument($name)
     {
-        $arguments = is_int($name) ? array_values($this->arguments) : $this->arguments;
+        $arguments = \is_int($name) ? array_values($this->arguments) : $this->arguments;
 
         return isset($arguments[$name]);
     }
@@ -174,7 +174,7 @@ public function getArguments()
      */
     public function getArgumentCount()
     {
-        return $this->hasAnArrayArgument ? PHP_INT_MAX : count($this->arguments);
+        return $this->hasAnArrayArgument ? PHP_INT_MAX : \count($this->arguments);
     }
 
     /**
@@ -381,7 +381,7 @@ public function getSynopsis($short = false)
             }
         }
 
-        if (count($elements) && $this->getArguments()) {
+        if (\count($elements) && $this->getArguments()) {
             $elements[] = '[--]';
         }
 
diff --git a/src/Symfony/Component/Console/Input/InputOption.php b/src/Symfony/Component/Console/Input/InputOption.php
index c9da966a26d9..9567876c8ace 100644
--- a/src/Symfony/Component/Console/Input/InputOption.php
+++ b/src/Symfony/Component/Console/Input/InputOption.php
@@ -56,7 +56,7 @@ public function __construct($name, $shortcut = null, $mode = null, $description
         }
 
         if (null !== $shortcut) {
-            if (is_array($shortcut)) {
+            if (\is_array($shortcut)) {
                 $shortcut = implode('|', $shortcut);
             }
             $shortcuts = preg_split('{(\|)-?}', ltrim($shortcut, '-'));
@@ -70,7 +70,7 @@ public function __construct($name, $shortcut = null, $mode = null, $description
 
         if (null === $mode) {
             $mode = self::VALUE_NONE;
-        } elseif (!is_int($mode) || $mode > 15 || $mode < 1) {
+        } elseif (!\is_int($mode) || $mode > 15 || $mode < 1) {
             throw new InvalidArgumentException(sprintf('Option mode "%s" is not valid.', $mode));
         }
 
@@ -162,7 +162,7 @@ public function setDefault($default = null)
         if ($this->isArray()) {
             if (null === $default) {
                 $default = array();
-            } elseif (!is_array($default)) {
+            } elseif (!\is_array($default)) {
                 throw new LogicException('A default value for an array option must be an array.');
             }
         }
diff --git a/src/Symfony/Component/Console/Input/StringInput.php b/src/Symfony/Component/Console/Input/StringInput.php
index 84d93684f0bd..add2b98fc416 100644
--- a/src/Symfony/Component/Console/Input/StringInput.php
+++ b/src/Symfony/Component/Console/Input/StringInput.php
@@ -60,14 +60,14 @@ public function __construct($input, InputDefinition $definition = null)
     private function tokenize($input)
     {
         $tokens = array();
-        $length = strlen($input);
+        $length = \strlen($input);
         $cursor = 0;
         while ($cursor < $length) {
             if (preg_match('/\s+/A', $input, $match, null, $cursor)) {
             } elseif (preg_match('/([^="\'\s]+?)(=?)('.self::REGEX_QUOTED_STRING.'+)/A', $input, $match, null, $cursor)) {
-                $tokens[] = $match[1].$match[2].stripcslashes(str_replace(array('"\'', '\'"', '\'\'', '""'), '', substr($match[3], 1, strlen($match[3]) - 2)));
+                $tokens[] = $match[1].$match[2].stripcslashes(str_replace(array('"\'', '\'"', '\'\'', '""'), '', substr($match[3], 1, \strlen($match[3]) - 2)));
             } elseif (preg_match('/'.self::REGEX_QUOTED_STRING.'/A', $input, $match, null, $cursor)) {
-                $tokens[] = stripcslashes(substr($match[0], 1, strlen($match[0]) - 2));
+                $tokens[] = stripcslashes(substr($match[0], 1, \strlen($match[0]) - 2));
             } elseif (preg_match('/'.self::REGEX_STRING.'/A', $input, $match, null, $cursor)) {
                 $tokens[] = stripcslashes($match[1]);
             } else {
@@ -75,7 +75,7 @@ private function tokenize($input)
                 throw new InvalidArgumentException(sprintf('Unable to parse input near "... %s ..."', substr($input, $cursor, 10)));
             }
 
-            $cursor += strlen($match[0]);
+            $cursor += \strlen($match[0]);
         }
 
         return $tokens;
diff --git a/src/Symfony/Component/Console/Logger/ConsoleLogger.php b/src/Symfony/Component/Console/Logger/ConsoleLogger.php
index d1aba10ac0d4..b79c14b2ac7f 100644
--- a/src/Symfony/Component/Console/Logger/ConsoleLogger.php
+++ b/src/Symfony/Component/Console/Logger/ConsoleLogger.php
@@ -94,7 +94,7 @@ private function interpolate($message, array $context)
         // build a replacement array with braces around the context keys
         $replace = array();
         foreach ($context as $key => $val) {
-            if (!is_array($val) && (!is_object($val) || method_exists($val, '__toString'))) {
+            if (!\is_array($val) && (!\is_object($val) || method_exists($val, '__toString'))) {
                 $replace[sprintf('{%s}', $key)] = $val;
             }
         }
diff --git a/src/Symfony/Component/Console/Output/ConsoleOutput.php b/src/Symfony/Component/Console/Output/ConsoleOutput.php
index 84efb981306f..505c64909266 100644
--- a/src/Symfony/Component/Console/Output/ConsoleOutput.php
+++ b/src/Symfony/Component/Console/Output/ConsoleOutput.php
@@ -121,7 +121,7 @@ protected function hasStderrSupport()
     private function isRunningOS400()
     {
         $checks = array(
-            function_exists('php_uname') ? php_uname('s') : '',
+            \function_exists('php_uname') ? php_uname('s') : '',
             getenv('OSTYPE'),
             PHP_OS,
         );
diff --git a/src/Symfony/Component/Console/Output/StreamOutput.php b/src/Symfony/Component/Console/Output/StreamOutput.php
index 6eb300ea322e..20da02759d29 100644
--- a/src/Symfony/Component/Console/Output/StreamOutput.php
+++ b/src/Symfony/Component/Console/Output/StreamOutput.php
@@ -42,7 +42,7 @@ class StreamOutput extends Output
      */
     public function __construct($stream, $verbosity = self::VERBOSITY_NORMAL, $decorated = null, OutputFormatterInterface $formatter = null)
     {
-        if (!is_resource($stream) || 'stream' !== get_resource_type($stream)) {
+        if (!\is_resource($stream) || 'stream' !== get_resource_type($stream)) {
             throw new InvalidArgumentException('The StreamOutput class needs a stream as its first argument.');
         }
 
@@ -98,18 +98,18 @@ protected function hasColorSupport()
         }
 
         if (DIRECTORY_SEPARATOR === '\\') {
-            return (function_exists('sapi_windows_vt100_support')
+            return (\function_exists('sapi_windows_vt100_support')
                 && @sapi_windows_vt100_support($this->stream))
                 || false !== getenv('ANSICON')
                 || 'ON' === getenv('ConEmuANSI')
                 || 'xterm' === getenv('TERM');
         }
 
-        if (function_exists('stream_isatty')) {
+        if (\function_exists('stream_isatty')) {
             return @stream_isatty($this->stream);
         }
 
-        if (function_exists('posix_isatty')) {
+        if (\function_exists('posix_isatty')) {
             return @posix_isatty($this->stream);
         }
 
diff --git a/src/Symfony/Component/Console/Question/ChoiceQuestion.php b/src/Symfony/Component/Console/Question/ChoiceQuestion.php
index 46cc72a368ee..0a45d7493252 100644
--- a/src/Symfony/Component/Console/Question/ChoiceQuestion.php
+++ b/src/Symfony/Component/Console/Question/ChoiceQuestion.php
@@ -156,7 +156,7 @@ private function getDefaultValidator()
                     }
                 }
 
-                if (count($results) > 1) {
+                if (\count($results) > 1) {
                     throw new InvalidArgumentException(sprintf('The provided answer is ambiguous. Value should be one of %s.', implode(' or ', $results)));
                 }
 
diff --git a/src/Symfony/Component/Console/Question/ConfirmationQuestion.php b/src/Symfony/Component/Console/Question/ConfirmationQuestion.php
index 40f54b4e9b8d..150ab27f303b 100644
--- a/src/Symfony/Component/Console/Question/ConfirmationQuestion.php
+++ b/src/Symfony/Component/Console/Question/ConfirmationQuestion.php
@@ -44,7 +44,7 @@ private function getDefaultNormalizer()
         $regex = $this->trueAnswerRegex;
 
         return function ($answer) use ($default, $regex) {
-            if (is_bool($answer)) {
+            if (\is_bool($answer)) {
                 return $answer;
             }
 
diff --git a/src/Symfony/Component/Console/Question/Question.php b/src/Symfony/Component/Console/Question/Question.php
index b9eed80c190f..b0f3a695ba73 100644
--- a/src/Symfony/Component/Console/Question/Question.php
+++ b/src/Symfony/Component/Console/Question/Question.php
@@ -136,11 +136,11 @@ public function getAutocompleterValues()
      */
     public function setAutocompleterValues($values)
     {
-        if (is_array($values)) {
+        if (\is_array($values)) {
             $values = $this->isAssoc($values) ? array_merge(array_keys($values), array_values($values)) : array_values($values);
         }
 
-        if (null !== $values && !is_array($values) && !$values instanceof \Traversable) {
+        if (null !== $values && !\is_array($values) && !$values instanceof \Traversable) {
             throw new InvalidArgumentException('Autocompleter values can be either an array, `null` or a `Traversable` object.');
         }
 
@@ -241,6 +241,6 @@ public function getNormalizer()
 
     protected function isAssoc($array)
     {
-        return (bool) count(array_filter(array_keys($array), 'is_string'));
+        return (bool) \count(array_filter(array_keys($array), 'is_string'));
     }
 }
diff --git a/src/Symfony/Component/Console/Shell.php b/src/Symfony/Component/Console/Shell.php
index 72df22f2742e..c25993d41d96 100644
--- a/src/Symfony/Component/Console/Shell.php
+++ b/src/Symfony/Component/Console/Shell.php
@@ -44,7 +44,7 @@ public function __construct(Application $application)
     {
         @trigger_error('The '.__CLASS__.' class is deprecated since Symfony 2.8 and will be removed in 3.0.', E_USER_DEPRECATED);
 
-        $this->hasReadline = function_exists('readline');
+        $this->hasReadline = \function_exists('readline');
         $this->application = $application;
         $this->history = getenv('HOME').'/.history_'.$application->getName();
         $this->output = new ConsoleOutput();
diff --git a/src/Symfony/Component/Console/Style/SymfonyStyle.php b/src/Symfony/Component/Console/Style/SymfonyStyle.php
index 14e641bbfcdd..b80c4910d056 100644
--- a/src/Symfony/Component/Console/Style/SymfonyStyle.php
+++ b/src/Symfony/Component/Console/Style/SymfonyStyle.php
@@ -61,7 +61,7 @@ public function __construct(InputInterface $input, OutputInterface $output)
      */
     public function block($messages, $type = null, $style = null, $prefix = ' ', $padding = false)
     {
-        $messages = is_array($messages) ? array_values($messages) : array($messages);
+        $messages = \is_array($messages) ? array_values($messages) : array($messages);
 
         $this->autoPrependBlock();
         $this->writeln($this->createBlock($messages, $type, $style, $prefix, $padding, true));
@@ -115,7 +115,7 @@ public function text($message)
     {
         $this->autoPrependText();
 
-        $messages = is_array($message) ? array_values($message) : array($message);
+        $messages = \is_array($message) ? array_values($message) : array($message);
         foreach ($messages as $message) {
             $this->writeln(sprintf(' %s', $message));
         }
@@ -128,7 +128,7 @@ public function text($message)
      */
     public function comment($message)
     {
-        $messages = is_array($message) ? array_values($message) : array($message);
+        $messages = \is_array($message) ? array_values($message) : array($message);
 
         $this->autoPrependBlock();
         $this->writeln($this->createBlock($messages, null, null, '<fg=default;bg=default> // </>'));
@@ -387,7 +387,7 @@ private function createBlock($messages, $type = null, $style = null, $prefix = '
 
         if (null !== $type) {
             $type = sprintf('[%s] ', $type);
-            $indentLength = strlen($type);
+            $indentLength = \strlen($type);
             $lineIndentation = str_repeat(' ', $indentLength);
         }
 
@@ -399,7 +399,7 @@ private function createBlock($messages, $type = null, $style = null, $prefix = '
 
             $lines = array_merge($lines, explode(PHP_EOL, wordwrap($message, $this->lineLength - $prefixLength - $indentLength, PHP_EOL, true)));
 
-            if (count($messages) > 1 && $key < count($messages) - 1) {
+            if (\count($messages) > 1 && $key < \count($messages) - 1) {
                 $lines[] = '';
             }
         }
diff --git a/src/Symfony/Component/Console/Tests/Command/CommandTest.php b/src/Symfony/Component/Console/Tests/Command/CommandTest.php
index ac4aa22fbb77..bffd8f7e5254 100644
--- a/src/Symfony/Component/Console/Tests/Command/CommandTest.php
+++ b/src/Symfony/Component/Console/Tests/Command/CommandTest.php
@@ -333,7 +333,7 @@ public function testRunWithProcessTitle()
         $command->setApplication(new Application());
         $command->setProcessTitle('foo');
         $this->assertSame(0, $command->run(new StringInput(''), new NullOutput()));
-        if (function_exists('cli_set_process_title')) {
+        if (\function_exists('cli_set_process_title')) {
             if (null === @cli_get_process_title() && 'Darwin' === PHP_OS) {
                 $this->markTestSkipped('Running "cli_get_process_title" as an unprivileged user is not supported on MacOS.');
             }
diff --git a/src/Symfony/Component/Console/Tests/Helper/LegacyDialogHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/LegacyDialogHelperTest.php
index d5b203a87d00..5f87e2a36b4e 100644
--- a/src/Symfony/Component/Console/Tests/Helper/LegacyDialogHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/LegacyDialogHelperTest.php
@@ -194,7 +194,7 @@ public function testAskAndValidate()
         $question = 'What color was the white horse of Henry IV?';
         $error = 'This is not a color!';
         $validator = function ($color) use ($error) {
-            if (!in_array($color, array('white', 'black'))) {
+            if (!\in_array($color, array('white', 'black'))) {
                 throw new InvalidArgumentException($error);
             }
 
diff --git a/src/Symfony/Component/Console/Tests/Helper/LegacyProgressHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/LegacyProgressHelperTest.php
index 561380879af1..ab5c494a2b56 100644
--- a/src/Symfony/Component/Console/Tests/Helper/LegacyProgressHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/LegacyProgressHelperTest.php
@@ -218,7 +218,7 @@ protected function generateOutput($expected)
             $expectedout = str_pad($expected, $this->lastMessagesLength, "\x20", STR_PAD_RIGHT);
         }
 
-        $this->lastMessagesLength = strlen($expectedout);
+        $this->lastMessagesLength = \strlen($expectedout);
 
         return "\x0D".$expectedout;
     }
diff --git a/src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php
index 9f837d0f9ed4..44cf715e0e9a 100644
--- a/src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php
@@ -282,7 +282,7 @@ public function testAskAndValidate()
 
         $error = 'This is not a color!';
         $validator = function ($color) use ($error) {
-            if (!in_array($color, array('white', 'black'))) {
+            if (!\in_array($color, array('white', 'black'))) {
                 throw new \InvalidArgumentException($error);
             }
 
diff --git a/src/Symfony/Component/CssSelector/Node/AbstractNode.php b/src/Symfony/Component/CssSelector/Node/AbstractNode.php
index 7477e9119df3..1d5d8ff7ba1d 100644
--- a/src/Symfony/Component/CssSelector/Node/AbstractNode.php
+++ b/src/Symfony/Component/CssSelector/Node/AbstractNode.php
@@ -34,7 +34,7 @@ abstract class AbstractNode implements NodeInterface
     public function getNodeName()
     {
         if (null === $this->nodeName) {
-            $this->nodeName = preg_replace('~.*\\\\([^\\\\]+)Node$~', '$1', get_called_class());
+            $this->nodeName = preg_replace('~.*\\\\([^\\\\]+)Node$~', '$1', \get_called_class());
         }
 
         return $this->nodeName;
diff --git a/src/Symfony/Component/CssSelector/Parser/Handler/HashHandler.php b/src/Symfony/Component/CssSelector/Parser/Handler/HashHandler.php
index 5f7f4d23be70..4460d0fbf6b8 100644
--- a/src/Symfony/Component/CssSelector/Parser/Handler/HashHandler.php
+++ b/src/Symfony/Component/CssSelector/Parser/Handler/HashHandler.php
@@ -51,7 +51,7 @@ public function handle(Reader $reader, TokenStream $stream)
 
         $value = $this->escaping->escapeUnicode($match[1]);
         $stream->push(new Token(Token::TYPE_HASH, $value, $reader->getPosition()));
-        $reader->moveForward(strlen($match[0]));
+        $reader->moveForward(\strlen($match[0]));
 
         return true;
     }
diff --git a/src/Symfony/Component/CssSelector/Parser/Handler/IdentifierHandler.php b/src/Symfony/Component/CssSelector/Parser/Handler/IdentifierHandler.php
index aa6804ed477d..b139f7c123b2 100644
--- a/src/Symfony/Component/CssSelector/Parser/Handler/IdentifierHandler.php
+++ b/src/Symfony/Component/CssSelector/Parser/Handler/IdentifierHandler.php
@@ -51,7 +51,7 @@ public function handle(Reader $reader, TokenStream $stream)
 
         $value = $this->escaping->escapeUnicode($match[0]);
         $stream->push(new Token(Token::TYPE_IDENTIFIER, $value, $reader->getPosition()));
-        $reader->moveForward(strlen($match[0]));
+        $reader->moveForward(\strlen($match[0]));
 
         return true;
     }
diff --git a/src/Symfony/Component/CssSelector/Parser/Handler/NumberHandler.php b/src/Symfony/Component/CssSelector/Parser/Handler/NumberHandler.php
index 7e561d1dc302..35643e3203b3 100644
--- a/src/Symfony/Component/CssSelector/Parser/Handler/NumberHandler.php
+++ b/src/Symfony/Component/CssSelector/Parser/Handler/NumberHandler.php
@@ -47,7 +47,7 @@ public function handle(Reader $reader, TokenStream $stream)
         }
 
         $stream->push(new Token(Token::TYPE_NUMBER, $match[0], $reader->getPosition()));
-        $reader->moveForward(strlen($match[0]));
+        $reader->moveForward(\strlen($match[0]));
 
         return true;
     }
diff --git a/src/Symfony/Component/CssSelector/Parser/Handler/StringHandler.php b/src/Symfony/Component/CssSelector/Parser/Handler/StringHandler.php
index f842e1ce20ea..ff5be91d08a2 100644
--- a/src/Symfony/Component/CssSelector/Parser/Handler/StringHandler.php
+++ b/src/Symfony/Component/CssSelector/Parser/Handler/StringHandler.php
@@ -47,7 +47,7 @@ public function handle(Reader $reader, TokenStream $stream)
     {
         $quote = $reader->getSubstring(1);
 
-        if (!in_array($quote, array("'", '"'))) {
+        if (!\in_array($quote, array("'", '"'))) {
             return false;
         }
 
@@ -59,18 +59,18 @@ public function handle(Reader $reader, TokenStream $stream)
         }
 
         // check unclosed strings
-        if (strlen($match[0]) === $reader->getRemainingLength()) {
+        if (\strlen($match[0]) === $reader->getRemainingLength()) {
             throw SyntaxErrorException::unclosedString($reader->getPosition() - 1);
         }
 
         // check quotes pairs validity
-        if ($quote !== $reader->getSubstring(1, strlen($match[0]))) {
+        if ($quote !== $reader->getSubstring(1, \strlen($match[0]))) {
             throw SyntaxErrorException::unclosedString($reader->getPosition() - 1);
         }
 
         $string = $this->escaping->escapeUnicodeAndNewLine($match[0]);
         $stream->push(new Token(Token::TYPE_STRING, $string, $reader->getPosition()));
-        $reader->moveForward(strlen($match[0]) + 1);
+        $reader->moveForward(\strlen($match[0]) + 1);
 
         return true;
     }
diff --git a/src/Symfony/Component/CssSelector/Parser/Handler/WhitespaceHandler.php b/src/Symfony/Component/CssSelector/Parser/Handler/WhitespaceHandler.php
index 4c2d3354fb83..396467af0f7f 100644
--- a/src/Symfony/Component/CssSelector/Parser/Handler/WhitespaceHandler.php
+++ b/src/Symfony/Component/CssSelector/Parser/Handler/WhitespaceHandler.php
@@ -39,7 +39,7 @@ public function handle(Reader $reader, TokenStream $stream)
         }
 
         $stream->push(new Token(Token::TYPE_WHITESPACE, $match[0], $reader->getPosition()));
-        $reader->moveForward(strlen($match[0]));
+        $reader->moveForward(\strlen($match[0]));
 
         return true;
     }
diff --git a/src/Symfony/Component/CssSelector/Parser/Parser.php b/src/Symfony/Component/CssSelector/Parser/Parser.php
index 195e107159d9..87c05a74b597 100644
--- a/src/Symfony/Component/CssSelector/Parser/Parser.php
+++ b/src/Symfony/Component/CssSelector/Parser/Parser.php
@@ -169,7 +169,7 @@ private function parseSimpleSelector(TokenStream $stream, $insideNegation = fals
     {
         $stream->skipWhitespace();
 
-        $selectorStart = count($stream->getUsed());
+        $selectorStart = \count($stream->getUsed());
         $result = $this->parseElementNode($stream);
         $pseudoElement = null;
 
@@ -206,7 +206,7 @@ private function parseSimpleSelector(TokenStream $stream, $insideNegation = fals
                 }
 
                 $identifier = $stream->getNextIdentifier();
-                if (in_array(strtolower($identifier), array('first-line', 'first-letter', 'before', 'after'))) {
+                if (\in_array(strtolower($identifier), array('first-line', 'first-letter', 'before', 'after'))) {
                     // Special case: CSS 2.1 pseudo-elements can have a single ':'.
                     // Any new pseudo-element must have two.
                     $pseudoElement = $identifier;
@@ -272,7 +272,7 @@ private function parseSimpleSelector(TokenStream $stream, $insideNegation = fals
             }
         }
 
-        if (count($stream->getUsed()) === $selectorStart) {
+        if (\count($stream->getUsed()) === $selectorStart) {
             throw SyntaxErrorException::unexpectedToken('selector', $stream->getPeek());
         }
 
diff --git a/src/Symfony/Component/CssSelector/Parser/Reader.php b/src/Symfony/Component/CssSelector/Parser/Reader.php
index 5a1be30cd957..076cb711c041 100644
--- a/src/Symfony/Component/CssSelector/Parser/Reader.php
+++ b/src/Symfony/Component/CssSelector/Parser/Reader.php
@@ -33,7 +33,7 @@ class Reader
     public function __construct($source)
     {
         $this->source = $source;
-        $this->length = strlen($source);
+        $this->length = \strlen($source);
     }
 
     /**
diff --git a/src/Symfony/Component/CssSelector/Parser/Token.php b/src/Symfony/Component/CssSelector/Parser/Token.php
index 9baaa6dd8d16..72baae776dab 100644
--- a/src/Symfony/Component/CssSelector/Parser/Token.php
+++ b/src/Symfony/Component/CssSelector/Parser/Token.php
@@ -92,7 +92,7 @@ public function isDelimiter(array $values = array())
             return true;
         }
 
-        return in_array($this->value, $values);
+        return \in_array($this->value, $values);
     }
 
     /**
diff --git a/src/Symfony/Component/CssSelector/Parser/Tokenizer/TokenizerEscaping.php b/src/Symfony/Component/CssSelector/Parser/Tokenizer/TokenizerEscaping.php
index c6f289aa1143..55ea42149329 100644
--- a/src/Symfony/Component/CssSelector/Parser/Tokenizer/TokenizerEscaping.php
+++ b/src/Symfony/Component/CssSelector/Parser/Tokenizer/TokenizerEscaping.php
@@ -65,13 +65,13 @@ private function replaceUnicodeSequences($value)
             $c = hexdec($match[1]);
 
             if (0x80 > $c %= 0x200000) {
-                return chr($c);
+                return \chr($c);
             }
             if (0x800 > $c) {
-                return chr(0xC0 | $c >> 6).chr(0x80 | $c & 0x3F);
+                return \chr(0xC0 | $c >> 6).\chr(0x80 | $c & 0x3F);
             }
             if (0x10000 > $c) {
-                return chr(0xE0 | $c >> 12).chr(0x80 | $c >> 6 & 0x3F).chr(0x80 | $c & 0x3F);
+                return \chr(0xE0 | $c >> 12).\chr(0x80 | $c >> 6 & 0x3F).\chr(0x80 | $c & 0x3F);
             }
         }, $value);
     }
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/AbstractHandlerTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/AbstractHandlerTest.php
index 8005616a9208..f5c9dc8bfecb 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/AbstractHandlerTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/AbstractHandlerTest.php
@@ -63,7 +63,7 @@ protected function assertRemainingContent(Reader $reader, $remainingContent)
             $this->assertEquals(0, $reader->getRemainingLength());
             $this->assertTrue($reader->isEOF());
         } else {
-            $this->assertEquals(strlen($remainingContent), $reader->getRemainingLength());
+            $this->assertEquals(\strlen($remainingContent), $reader->getRemainingLength());
             $this->assertEquals(0, $reader->getOffset($remainingContent));
         }
     }
diff --git a/src/Symfony/Component/CssSelector/Tests/XPath/TranslatorTest.php b/src/Symfony/Component/CssSelector/Tests/XPath/TranslatorTest.php
index 519417835cef..610458297ece 100644
--- a/src/Symfony/Component/CssSelector/Tests/XPath/TranslatorTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/XPath/TranslatorTest.php
@@ -37,9 +37,9 @@ public function testXmlLang($css, array $elementsId)
         $translator = new Translator();
         $document = new \SimpleXMLElement(file_get_contents(__DIR__.'/Fixtures/lang.xml'));
         $elements = $document->xpath($translator->cssToXPath($css));
-        $this->assertCount(count($elementsId), $elements);
+        $this->assertCount(\count($elementsId), $elements);
         foreach ($elements as $element) {
-            $this->assertTrue(in_array($element->attributes()->id, $elementsId));
+            $this->assertTrue(\in_array($element->attributes()->id, $elementsId));
         }
     }
 
@@ -54,10 +54,10 @@ public function testHtmlIds($css, array $elementsId)
         $document->loadHTMLFile(__DIR__.'/Fixtures/ids.html');
         $document = simplexml_import_dom($document);
         $elements = $document->xpath($translator->cssToXPath($css));
-        $this->assertCount(count($elementsId), $elementsId);
+        $this->assertCount(\count($elementsId), $elementsId);
         foreach ($elements as $element) {
             if (null !== $element->attributes()->id) {
-                $this->assertTrue(in_array($element->attributes()->id, $elementsId));
+                $this->assertTrue(\in_array($element->attributes()->id, $elementsId));
             }
         }
         libxml_clear_errors();
diff --git a/src/Symfony/Component/CssSelector/XPath/Extension/AttributeMatchingExtension.php b/src/Symfony/Component/CssSelector/XPath/Extension/AttributeMatchingExtension.php
index 6ace8b592596..2078dca61da1 100644
--- a/src/Symfony/Component/CssSelector/XPath/Extension/AttributeMatchingExtension.php
+++ b/src/Symfony/Component/CssSelector/XPath/Extension/AttributeMatchingExtension.php
@@ -128,7 +128,7 @@ public function translateSuffixMatch(XPathExpr $xpath, $attribute, $value)
         return $xpath->addCondition($value ? sprintf(
             '%1$s and substring(%1$s, string-length(%1$s)-%2$s) = %3$s',
             $attribute,
-            strlen($value) - 1,
+            \strlen($value) - 1,
             Translator::getXpathLiteral($value)
         ) : '0');
     }
diff --git a/src/Symfony/Component/CssSelector/XPath/Translator.php b/src/Symfony/Component/CssSelector/XPath/Translator.php
index d20ad7dc3401..dcf9071ed958 100644
--- a/src/Symfony/Component/CssSelector/XPath/Translator.php
+++ b/src/Symfony/Component/CssSelector/XPath/Translator.php
@@ -176,7 +176,7 @@ public function nodeToXPath(NodeInterface $node)
             throw new ExpressionErrorException(sprintf('Node "%s" not supported.', $node->getNodeName()));
         }
 
-        return call_user_func($this->nodeTranslators[$node->getNodeName()], $node, $this);
+        return \call_user_func($this->nodeTranslators[$node->getNodeName()], $node, $this);
     }
 
     /**
@@ -194,7 +194,7 @@ public function addCombination($combiner, NodeInterface $xpath, NodeInterface $c
             throw new ExpressionErrorException(sprintf('Combiner "%s" not supported.', $combiner));
         }
 
-        return call_user_func($this->combinationTranslators[$combiner], $this->nodeToXPath($xpath), $this->nodeToXPath($combinedXpath));
+        return \call_user_func($this->combinationTranslators[$combiner], $this->nodeToXPath($xpath), $this->nodeToXPath($combinedXpath));
     }
 
     /**
@@ -208,7 +208,7 @@ public function addFunction(XPathExpr $xpath, FunctionNode $function)
             throw new ExpressionErrorException(sprintf('Function "%s" not supported.', $function->getName()));
         }
 
-        return call_user_func($this->functionTranslators[$function->getName()], $xpath, $function);
+        return \call_user_func($this->functionTranslators[$function->getName()], $xpath, $function);
     }
 
     /**
@@ -225,7 +225,7 @@ public function addPseudoClass(XPathExpr $xpath, $pseudoClass)
             throw new ExpressionErrorException(sprintf('Pseudo-class "%s" not supported.', $pseudoClass));
         }
 
-        return call_user_func($this->pseudoClassTranslators[$pseudoClass], $xpath);
+        return \call_user_func($this->pseudoClassTranslators[$pseudoClass], $xpath);
     }
 
     /**
@@ -244,7 +244,7 @@ public function addAttributeMatching(XPathExpr $xpath, $operator, $attribute, $v
             throw new ExpressionErrorException(sprintf('Attribute matcher operator "%s" not supported.', $operator));
         }
 
-        return call_user_func($this->attributeMatchingTranslators[$operator], $xpath, $attribute, $value);
+        return \call_user_func($this->attributeMatchingTranslators[$operator], $xpath, $attribute, $value);
     }
 
     /**
diff --git a/src/Symfony/Component/Debug/DebugClassLoader.php b/src/Symfony/Component/Debug/DebugClassLoader.php
index b0ff39720750..5d4010b8b24e 100644
--- a/src/Symfony/Component/Debug/DebugClassLoader.php
+++ b/src/Symfony/Component/Debug/DebugClassLoader.php
@@ -38,7 +38,7 @@ class DebugClassLoader
      */
     public function __construct($classLoader)
     {
-        $this->wasFinder = is_object($classLoader) && method_exists($classLoader, 'findFile');
+        $this->wasFinder = \is_object($classLoader) && method_exists($classLoader, 'findFile');
 
         if ($this->wasFinder) {
             @trigger_error('The '.__METHOD__.' method will no longer support receiving an object into its $classLoader argument in 3.0.', E_USER_DEPRECATED);
@@ -46,7 +46,7 @@ public function __construct($classLoader)
             $this->isFinder = true;
         } else {
             $this->classLoader = $classLoader;
-            $this->isFinder = is_array($classLoader) && method_exists($classLoader[0], 'findFile');
+            $this->isFinder = \is_array($classLoader) && method_exists($classLoader[0], 'findFile');
         }
 
         if (!isset(self::$caseCheck)) {
@@ -60,7 +60,7 @@ public function __construct($classLoader)
             if (false === $test || false === $i) {
                 // filesystem is case sensitive
                 self::$caseCheck = 0;
-            } elseif (substr($test, -strlen($file)) === $file) {
+            } elseif (substr($test, -\strlen($file)) === $file) {
                 // filesystem is case insensitive and realpath() normalizes the case of characters
                 self::$caseCheck = 1;
             } elseif (false !== stripos(PHP_OS, 'darwin')) {
@@ -92,7 +92,7 @@ public static function enable()
         class_exists('Symfony\Component\Debug\ErrorHandler');
         class_exists('Psr\Log\LogLevel');
 
-        if (!is_array($functions = spl_autoload_functions())) {
+        if (!\is_array($functions = spl_autoload_functions())) {
             return;
         }
 
@@ -101,7 +101,7 @@ class_exists('Psr\Log\LogLevel');
         }
 
         foreach ($functions as $function) {
-            if (!is_array($function) || !$function[0] instanceof self) {
+            if (!\is_array($function) || !$function[0] instanceof self) {
                 $function = array(new static($function), 'loadClass');
             }
 
@@ -114,7 +114,7 @@ class_exists('Psr\Log\LogLevel');
      */
     public static function disable()
     {
-        if (!is_array($functions = spl_autoload_functions())) {
+        if (!\is_array($functions = spl_autoload_functions())) {
             return;
         }
 
@@ -123,7 +123,7 @@ public static function disable()
         }
 
         foreach ($functions as $function) {
-            if (is_array($function) && $function[0] instanceof self) {
+            if (\is_array($function) && $function[0] instanceof self) {
                 $function = $function[0]->getClassLoader();
             }
 
@@ -169,7 +169,7 @@ public function loadClass($class)
                     require $file;
                 }
             } else {
-                call_user_func($this->classLoader, $class);
+                \call_user_func($this->classLoader, $class);
                 $file = false;
             }
         } catch (\Exception $e) {
@@ -184,7 +184,7 @@ public function loadClass($class)
 
         ErrorHandler::unstackErrors();
 
-        $exists = class_exists($class, false) || interface_exists($class, false) || (function_exists('trait_exists') && trait_exists($class, false));
+        $exists = class_exists($class, false) || interface_exists($class, false) || (\function_exists('trait_exists') && trait_exists($class, false));
 
         if ($class && '\\' === $class[0]) {
             $class = substr($class, 1);
@@ -198,7 +198,7 @@ public function loadClass($class)
                 throw new \RuntimeException(sprintf('Case mismatch between loaded and declared class names: %s vs %s', $class, $name));
             }
 
-            if (in_array(strtolower($refl->getShortName()), self::$php7Reserved)) {
+            if (\in_array(strtolower($refl->getShortName()), self::$php7Reserved)) {
                 @trigger_error(sprintf('%s uses a reserved class name (%s) that will break on PHP 7 and higher', $name, $refl->getShortName()), E_USER_DEPRECATED);
             } elseif (preg_match('#\n \* @deprecated (.*?)\r?\n \*(?: @|/$)#s', $refl->getDocComment(), $notice)) {
                 self::$deprecated[$name] = preg_replace('#\s*\r?\n \* +#', ' ', $notice[1]);
@@ -254,8 +254,8 @@ public function loadClass($class)
                 $real = explode('\\', $class.strrchr($file, '.'));
                 $tail = explode(DIRECTORY_SEPARATOR, str_replace('/', DIRECTORY_SEPARATOR, $file));
 
-                $i = count($tail) - 1;
-                $j = count($real) - 1;
+                $i = \count($tail) - 1;
+                $j = \count($real) - 1;
 
                 while (isset($tail[$i], $real[$j]) && $tail[$i] === $real[$j]) {
                     --$i;
@@ -266,7 +266,7 @@ public function loadClass($class)
             }
             if (self::$caseCheck && $tail) {
                 $tail = DIRECTORY_SEPARATOR.implode(DIRECTORY_SEPARATOR, $tail);
-                $tailLen = strlen($tail);
+                $tailLen = \strlen($tail);
                 $real = $refl->getFileName();
 
                 if (2 === self::$caseCheck) {
@@ -291,7 +291,7 @@ public function loadClass($class)
 
                             $dir = $real;
                             $k = $kDir;
-                            $i = strlen($dir) - 1;
+                            $i = \strlen($dir) - 1;
                             while (!isset(self::$darwinCache[$k])) {
                                 self::$darwinCache[$k] = array($dir, array());
                                 self::$darwinCache[$dir] = &self::$darwinCache[$k];
diff --git a/src/Symfony/Component/Debug/ErrorHandler.php b/src/Symfony/Component/Debug/ErrorHandler.php
index f7c7c4bd5b6e..7904ba9d0f26 100644
--- a/src/Symfony/Component/Debug/ErrorHandler.php
+++ b/src/Symfony/Component/Debug/ErrorHandler.php
@@ -145,17 +145,17 @@ public static function register($handler = null, $replace = true)
             $handler->isRoot = true;
         }
 
-        if ($handlerIsNew && is_array($prev) && $prev[0] instanceof self) {
+        if ($handlerIsNew && \is_array($prev) && $prev[0] instanceof self) {
             $handler = $prev[0];
             $replace = false;
         }
         if (!$replace && $prev) {
             restore_error_handler();
-            $handlerIsRegistered = is_array($prev) && $handler === $prev[0];
+            $handlerIsRegistered = \is_array($prev) && $handler === $prev[0];
         } else {
             $handlerIsRegistered = true;
         }
-        if (is_array($prev = set_exception_handler(array($handler, 'handleException'))) && $prev[0] instanceof self) {
+        if (\is_array($prev = set_exception_handler(array($handler, 'handleException'))) && $prev[0] instanceof self) {
             restore_exception_handler();
             if (!$handlerIsRegistered) {
                 $handler = $prev[0];
@@ -193,7 +193,7 @@ public function setDefaultLogger(LoggerInterface $logger, $levels = null, $repla
     {
         $loggers = array();
 
-        if (is_array($levels)) {
+        if (\is_array($levels)) {
             foreach ($levels as $type => $logLevel) {
                 if (empty($this->loggers[$type][0]) || $replace || $this->loggers[$type][0] === $this->bootstrappingLogger) {
                     $loggers[$type] = array($logger, $logLevel);
@@ -233,7 +233,7 @@ public function setLoggers(array $loggers)
             if (!isset($prev[$type])) {
                 throw new \InvalidArgumentException('Unknown error type: '.$type);
             }
-            if (!is_array($log)) {
+            if (!\is_array($log)) {
                 $log = array($log);
             } elseif (!array_key_exists(0, $log)) {
                 throw new \InvalidArgumentException('No logger provided');
@@ -278,7 +278,7 @@ public function setLoggers(array $loggers)
      */
     public function setExceptionHandler($handler)
     {
-        if (null !== $handler && !is_callable($handler)) {
+        if (null !== $handler && !\is_callable($handler)) {
             throw new \LogicException('The exception handler must be a valid PHP callable.');
         }
         $prev = $this->exceptionHandler;
@@ -374,7 +374,7 @@ private function reRegister($prev)
     {
         if ($prev !== $this->thrownErrors | $this->loggedErrors) {
             $handler = set_error_handler('var_dump');
-            $handler = is_array($handler) ? $handler[0] : null;
+            $handler = \is_array($handler) ? $handler[0] : null;
             restore_error_handler();
             if ($handler === $this) {
                 restore_error_handler();
@@ -415,7 +415,7 @@ public function handleError($type, $message, $file, $line)
         }
         $scope = $this->scopedErrors & $type;
 
-        if (4 < $numArgs = func_num_args()) {
+        if (4 < $numArgs = \func_num_args()) {
             $context = $scope ? (func_get_arg(4) ?: array()) : array();
             $backtrace = 5 < $numArgs ? func_get_arg(5) : null; // defined on HHVM
         } else {
@@ -651,7 +651,7 @@ public static function handleFatalError(array $error = null)
         $previousHandler = null;
         $sameHandlerLimit = 10;
 
-        while (!is_array($handler) || !$handler[0] instanceof self) {
+        while (!\is_array($handler) || !$handler[0] instanceof self) {
             $handler = set_exception_handler('var_dump');
             restore_exception_handler();
 
@@ -826,7 +826,7 @@ public static function setLogger(LoggerInterface $logger, $channel = 'deprecatio
         @trigger_error('The '.__METHOD__.' static method is deprecated since Symfony 2.6 and will be removed in 3.0. Use the setLoggers() or setDefaultLogger() methods instead.', E_USER_DEPRECATED);
 
         $handler = set_error_handler('var_dump');
-        $handler = is_array($handler) ? $handler[0] : null;
+        $handler = \is_array($handler) ? $handler[0] : null;
         restore_error_handler();
         if (!$handler instanceof self) {
             return;
diff --git a/src/Symfony/Component/Debug/Exception/FatalErrorException.php b/src/Symfony/Component/Debug/Exception/FatalErrorException.php
index 3fd7c45fdbf9..1aa87a5ee85c 100644
--- a/src/Symfony/Component/Debug/Exception/FatalErrorException.php
+++ b/src/Symfony/Component/Debug/Exception/FatalErrorException.php
@@ -48,7 +48,7 @@ public function __construct($message, $code, $severity, $filename, $lineno, $tra
 
             $this->setTrace($trace);
         } elseif (null !== $traceOffset) {
-            if (function_exists('xdebug_get_function_stack')) {
+            if (\function_exists('xdebug_get_function_stack')) {
                 $trace = xdebug_get_function_stack();
                 if (0 < $traceOffset) {
                     array_splice($trace, -$traceOffset);
@@ -77,7 +77,7 @@ public function __construct($message, $code, $severity, $filename, $lineno, $tra
 
                 unset($frame);
                 $trace = array_reverse($trace);
-            } elseif (function_exists('symfony_debug_backtrace')) {
+            } elseif (\function_exists('symfony_debug_backtrace')) {
                 $trace = symfony_debug_backtrace();
                 if (0 < $traceOffset) {
                     array_splice($trace, 0, $traceOffset);
diff --git a/src/Symfony/Component/Debug/Exception/FlattenException.php b/src/Symfony/Component/Debug/Exception/FlattenException.php
index b3a98ac0edc7..f136417ffb33 100644
--- a/src/Symfony/Component/Debug/Exception/FlattenException.php
+++ b/src/Symfony/Component/Debug/Exception/FlattenException.php
@@ -29,10 +29,10 @@ class FlattenException
     public static function __callStatic($method, $args)
     {
         if (!method_exists('Symfony\Component\Debug\Exception\FlattenException', $method)) {
-            throw new \BadMethodCallException(sprintf('Call to undefined method %s::%s()', get_called_class(), $method));
+            throw new \BadMethodCallException(sprintf('Call to undefined method %s::%s()', \get_called_class(), $method));
         }
 
-        return call_user_func_array(array('Symfony\Component\Debug\Exception\FlattenException', $method), $args);
+        return \call_user_func_array(array('Symfony\Component\Debug\Exception\FlattenException', $method), $args);
     }
 
     public function __call($method, $args)
@@ -42,10 +42,10 @@ public function __call($method, $args)
         }
 
         if (!method_exists($this->handler, $method)) {
-            throw new \BadMethodCallException(sprintf('Call to undefined method %s::%s()', get_class($this), $method));
+            throw new \BadMethodCallException(sprintf('Call to undefined method %s::%s()', \get_class($this), $method));
         }
 
-        return call_user_func_array(array($this->handler, $method), $args);
+        return \call_user_func_array(array($this->handler, $method), $args);
     }
 }
 
@@ -91,7 +91,7 @@ public static function create(\Exception $exception, $statusCode = null, array $
         $e->setStatusCode($statusCode);
         $e->setHeaders($headers);
         $e->setTraceFromException($exception);
-        $e->setClass(get_class($exception));
+        $e->setClass(\get_class($exception));
         $e->setFile($exception->getFile());
         $e->setLine($exception->getLine());
 
@@ -266,9 +266,9 @@ private function flattenArgs($args, $level = 0, &$count = 0)
             if ($value instanceof \__PHP_Incomplete_Class) {
                 // is_object() returns false on PHP<=7.1
                 $result[$key] = array('incomplete-object', $this->getClassNameFromIncomplete($value));
-            } elseif (is_object($value)) {
-                $result[$key] = array('object', get_class($value));
-            } elseif (is_array($value)) {
+            } elseif (\is_object($value)) {
+                $result[$key] = array('object', \get_class($value));
+            } elseif (\is_array($value)) {
                 if ($level > 10) {
                     $result[$key] = array('array', '*DEEP NESTED ARRAY*');
                 } else {
@@ -276,9 +276,9 @@ private function flattenArgs($args, $level = 0, &$count = 0)
                 }
             } elseif (null === $value) {
                 $result[$key] = array('null', null);
-            } elseif (is_bool($value)) {
+            } elseif (\is_bool($value)) {
                 $result[$key] = array('boolean', $value);
-            } elseif (is_resource($value)) {
+            } elseif (\is_resource($value)) {
                 $result[$key] = array('resource', get_resource_type($value));
             } else {
                 $result[$key] = array('string', (string) $value);
diff --git a/src/Symfony/Component/Debug/ExceptionHandler.php b/src/Symfony/Component/Debug/ExceptionHandler.php
index 1199d1167b5e..92c7ee45f1a1 100644
--- a/src/Symfony/Component/Debug/ExceptionHandler.php
+++ b/src/Symfony/Component/Debug/ExceptionHandler.php
@@ -65,7 +65,7 @@ public static function register($debug = true, $charset = null, $fileLinkFormat
         $handler = new static($debug, $charset, $fileLinkFormat);
 
         $prev = set_exception_handler(array($handler, 'handle'));
-        if (is_array($prev) && $prev[0] instanceof ErrorHandler) {
+        if (\is_array($prev) && $prev[0] instanceof ErrorHandler) {
             restore_exception_handler();
             $prev[0]->setExceptionHandler(array($handler, 'handle'));
         }
@@ -82,7 +82,7 @@ public static function register($debug = true, $charset = null, $fileLinkFormat
      */
     public function setHandler($handler)
     {
-        if (null !== $handler && !is_callable($handler)) {
+        if (null !== $handler && !\is_callable($handler)) {
             throw new \LogicException('The exception handler must be a valid PHP callable.');
         }
         $old = $this->handler;
@@ -137,7 +137,7 @@ public function handle(\Exception $exception)
         $this->caughtBuffer = null;
 
         try {
-            call_user_func($this->handler, $exception);
+            \call_user_func($this->handler, $exception);
             $this->caughtLength = $caughtLength;
         } catch (\Exception $e) {
             if (!$caughtLength) {
@@ -157,7 +157,7 @@ public function handle(\Exception $exception)
     private function failSafeHandle(\Exception $exception)
     {
         if (class_exists('Symfony\Component\HttpFoundation\Response', false)
-            && __CLASS__ !== get_class($this)
+            && __CLASS__ !== \get_class($this)
             && ($reflector = new \ReflectionMethod($this, 'createResponse'))
             && __CLASS__ !== $reflector->class
         ) {
@@ -251,7 +251,7 @@ public function getContent(FlattenException $exception)
         $content = '';
         if ($this->debug) {
             try {
-                $count = count($exception->getAllPrevious());
+                $count = \count($exception->getAllPrevious());
                 $total = $count + 1;
                 foreach ($exception->toArray() as $position => $e) {
                     $ind = $count - $position + 1;
@@ -284,7 +284,7 @@ public function getContent(FlattenException $exception)
             } catch (\Exception $e) {
                 // something nasty happened and we cannot throw an exception anymore
                 if ($this->debug) {
-                    $title = sprintf('Exception thrown when handling an exception (%s: %s)', get_class($e), $this->escapeHtml($e->getMessage()));
+                    $title = sprintf('Exception thrown when handling an exception (%s: %s)', \get_class($e), $this->escapeHtml($e->getMessage()));
                 } else {
                     $title = 'Whoops, looks like something went wrong.';
                 }
@@ -423,7 +423,7 @@ private function formatArgs(array $args)
             if ('object' === $item[0]) {
                 $formattedValue = sprintf('<em>object</em>(%s)', $this->formatClass($item[1]));
             } elseif ('array' === $item[0]) {
-                $formattedValue = sprintf('<em>array</em>(%s)', is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]);
+                $formattedValue = sprintf('<em>array</em>(%s)', \is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]);
             } elseif ('string' === $item[0]) {
                 $formattedValue = sprintf("'%s'", $this->escapeHtml($item[1]));
             } elseif ('null' === $item[0]) {
@@ -436,7 +436,7 @@ private function formatArgs(array $args)
                 $formattedValue = str_replace("\n", '', var_export($this->escapeHtml((string) $item[1]), true));
             }
 
-            $result[] = is_int($key) ? $formattedValue : sprintf("'%s' => %s", $this->escapeHtml($key), $formattedValue);
+            $result[] = \is_int($key) ? $formattedValue : sprintf("'%s' => %s", $this->escapeHtml($key), $formattedValue);
         }
 
         return implode(', ', $result);
diff --git a/src/Symfony/Component/Debug/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php b/src/Symfony/Component/Debug/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php
index 612bfcaf7f96..33c4dba4cdad 100644
--- a/src/Symfony/Component/Debug/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php
+++ b/src/Symfony/Component/Debug/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php
@@ -30,9 +30,9 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
      */
     public function handleError(array $error, FatalErrorException $exception)
     {
-        $messageLen = strlen($error['message']);
+        $messageLen = \strlen($error['message']);
         $notFoundSuffix = '\' not found';
-        $notFoundSuffixLen = strlen($notFoundSuffix);
+        $notFoundSuffixLen = \strlen($notFoundSuffix);
         if ($notFoundSuffixLen > $messageLen) {
             return;
         }
@@ -43,7 +43,7 @@ public function handleError(array $error, FatalErrorException $exception)
 
         foreach (array('class', 'interface', 'trait') as $typeName) {
             $prefix = ucfirst($typeName).' \'';
-            $prefixLen = strlen($prefix);
+            $prefixLen = \strlen($prefix);
             if (0 !== strpos($error['message'], $prefix)) {
                 continue;
             }
@@ -86,7 +86,7 @@ public function handleError(array $error, FatalErrorException $exception)
      */
     private function getClassCandidates($class)
     {
-        if (!is_array($functions = spl_autoload_functions())) {
+        if (!\is_array($functions = spl_autoload_functions())) {
             return array();
         }
 
@@ -94,7 +94,7 @@ private function getClassCandidates($class)
         $classes = array();
 
         foreach ($functions as $function) {
-            if (!is_array($function)) {
+            if (!\is_array($function)) {
                 continue;
             }
             // get class loaders wrapped by DebugClassLoader
@@ -102,11 +102,11 @@ private function getClassCandidates($class)
                 $function = $function[0]->getClassLoader();
 
                 // @deprecated since version 2.5. Returning an object from DebugClassLoader::getClassLoader() is deprecated.
-                if (is_object($function)) {
+                if (\is_object($function)) {
                     $function = array($function);
                 }
 
-                if (!is_array($function)) {
+                if (!\is_array($function)) {
                     continue;
                 }
             }
@@ -139,7 +139,7 @@ private function getClassCandidates($class)
      */
     private function findClassInPath($path, $class, $prefix)
     {
-        if (!$path = realpath($path.'/'.strtr($prefix, '\\_', '//')) ?: realpath($path.'/'.dirname(strtr($prefix, '\\_', '//'))) ?: realpath($path)) {
+        if (!$path = realpath($path.'/'.strtr($prefix, '\\_', '//')) ?: realpath($path.'/'.\dirname(strtr($prefix, '\\_', '//'))) ?: realpath($path)) {
             return array();
         }
 
@@ -207,6 +207,6 @@ private function convertFileToClass($path, $file, $prefix)
      */
     private function classExists($class)
     {
-        return class_exists($class, false) || interface_exists($class, false) || (function_exists('trait_exists') && trait_exists($class, false));
+        return class_exists($class, false) || interface_exists($class, false) || (\function_exists('trait_exists') && trait_exists($class, false));
     }
 }
diff --git a/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedFunctionFatalErrorHandler.php b/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedFunctionFatalErrorHandler.php
index c6f391a79c68..6bfe5f97f4bb 100644
--- a/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedFunctionFatalErrorHandler.php
+++ b/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedFunctionFatalErrorHandler.php
@@ -26,9 +26,9 @@ class UndefinedFunctionFatalErrorHandler implements FatalErrorHandlerInterface
      */
     public function handleError(array $error, FatalErrorException $exception)
     {
-        $messageLen = strlen($error['message']);
+        $messageLen = \strlen($error['message']);
         $notFoundSuffix = '()';
-        $notFoundSuffixLen = strlen($notFoundSuffix);
+        $notFoundSuffixLen = \strlen($notFoundSuffix);
         if ($notFoundSuffixLen > $messageLen) {
             return;
         }
@@ -38,7 +38,7 @@ public function handleError(array $error, FatalErrorException $exception)
         }
 
         $prefix = 'Call to undefined function ';
-        $prefixLen = strlen($prefix);
+        $prefixLen = \strlen($prefix);
         if (0 !== strpos($error['message'], $prefix)) {
             return;
         }
diff --git a/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php b/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php
index 6fa62b6f24fb..618a2c208b71 100644
--- a/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php
+++ b/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php
@@ -44,7 +44,7 @@ public function handleError(array $error, FatalErrorException $exception)
         $candidates = array();
         foreach ($methods as $definedMethodName) {
             $lev = levenshtein($methodName, $definedMethodName);
-            if ($lev <= strlen($methodName) / 3 || false !== strpos($definedMethodName, $methodName)) {
+            if ($lev <= \strlen($methodName) / 3 || false !== strpos($definedMethodName, $methodName)) {
                 $candidates[] = $definedMethodName;
             }
         }
diff --git a/src/Symfony/Component/Debug/Resources/ext/tests/003.phpt b/src/Symfony/Component/Debug/Resources/ext/tests/003.phpt
index ce3c4e0ab564..4e7645031ccf 100644
--- a/src/Symfony/Component/Debug/Resources/ext/tests/003.phpt
+++ b/src/Symfony/Component/Debug/Resources/ext/tests/003.phpt
@@ -45,7 +45,7 @@ function foo()
 $handler = ErrorHandler::register();
 $handler->setExceptionHandler('print_r');
 
-if (function_exists('xdebug_disable')) {
+if (\function_exists('xdebug_disable')) {
     xdebug_disable();
 }
 
diff --git a/src/Symfony/Component/Debug/Tests/ErrorHandlerTest.php b/src/Symfony/Component/Debug/Tests/ErrorHandlerTest.php
index 64ec7b36bdf2..03a387d30996 100644
--- a/src/Symfony/Component/Debug/Tests/ErrorHandlerTest.php
+++ b/src/Symfony/Component/Debug/Tests/ErrorHandlerTest.php
@@ -526,7 +526,7 @@ public function testHandleErrorException()
 
         $handler = new ErrorHandler();
         $handler->setExceptionHandler(function () use (&$args) {
-            $args = func_get_args();
+            $args = \func_get_args();
         });
 
         $handler->handleException($exception);
@@ -571,7 +571,7 @@ public function testHandleFatalErrorOnHHVM()
                 'backtrace' => array(456),
             );
 
-            call_user_func_array(array($handler, 'handleError'), $error);
+            \call_user_func_array(array($handler, 'handleError'), $error);
             $handler->handleFatalError($error);
 
             restore_error_handler();
diff --git a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php
index 0611ed91e31d..7ba9b21d895a 100644
--- a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php
+++ b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php
@@ -24,7 +24,7 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
     public static function setUpBeforeClass()
     {
         foreach (spl_autoload_functions() as $function) {
-            if (!is_array($function)) {
+            if (!\is_array($function)) {
                 continue;
             }
 
@@ -34,7 +34,7 @@ public static function setUpBeforeClass()
             }
 
             if ($function[0] instanceof ComposerClassLoader) {
-                $function[0]->add('Symfony_Component_Debug_Tests_Fixtures', dirname(dirname(dirname(dirname(dirname(__DIR__))))));
+                $function[0]->add('Symfony_Component_Debug_Tests_Fixtures', \dirname(\dirname(\dirname(\dirname(\dirname(__DIR__))))));
                 break;
             }
         }
diff --git a/src/Symfony/Component/Debug/Tests/HeaderMock.php b/src/Symfony/Component/Debug/Tests/HeaderMock.php
index 65d0b588558b..3d8d84c5a4c4 100644
--- a/src/Symfony/Component/Debug/Tests/HeaderMock.php
+++ b/src/Symfony/Component/Debug/Tests/HeaderMock.php
@@ -27,12 +27,12 @@ function testHeader()
 {
     static $headers = array();
 
-    if (!$h = func_get_args()) {
+    if (!$h = \func_get_args()) {
         $h = $headers;
         $headers = array();
 
         return $h;
     }
 
-    $headers[] = func_get_args();
+    $headers[] = \func_get_args();
 }
diff --git a/src/Symfony/Component/Debug/Tests/phpt/decorate_exception_hander.phpt b/src/Symfony/Component/Debug/Tests/phpt/decorate_exception_hander.phpt
index 7ce7b9dc6f7d..74cf2e917100 100644
--- a/src/Symfony/Component/Debug/Tests/phpt/decorate_exception_hander.phpt
+++ b/src/Symfony/Component/Debug/Tests/phpt/decorate_exception_hander.phpt
@@ -7,7 +7,7 @@ namespace Symfony\Component\Debug;
 
 $vendor = __DIR__;
 while (!file_exists($vendor.'/vendor')) {
-    $vendor = dirname($vendor);
+    $vendor = \dirname($vendor);
 }
 require $vendor.'/vendor/autoload.php';
 
diff --git a/src/Symfony/Component/Debug/Tests/phpt/exception_rethrown.phpt b/src/Symfony/Component/Debug/Tests/phpt/exception_rethrown.phpt
index 9df0a65cf79f..3f4559543064 100644
--- a/src/Symfony/Component/Debug/Tests/phpt/exception_rethrown.phpt
+++ b/src/Symfony/Component/Debug/Tests/phpt/exception_rethrown.phpt
@@ -7,7 +7,7 @@ namespace Symfony\Component\Debug;
 
 $vendor = __DIR__;
 while (!file_exists($vendor.'/vendor')) {
-    $vendor = dirname($vendor);
+    $vendor = \dirname($vendor);
 }
 require $vendor.'/vendor/autoload.php';
 
diff --git a/src/Symfony/Component/Debug/Tests/phpt/fatal_with_nested_handlers.phpt b/src/Symfony/Component/Debug/Tests/phpt/fatal_with_nested_handlers.phpt
index 5c5245c069e6..2b74e5c6857f 100644
--- a/src/Symfony/Component/Debug/Tests/phpt/fatal_with_nested_handlers.phpt
+++ b/src/Symfony/Component/Debug/Tests/phpt/fatal_with_nested_handlers.phpt
@@ -7,7 +7,7 @@ namespace Symfony\Component\Debug;
 
 $vendor = __DIR__;
 while (!file_exists($vendor.'/vendor')) {
-    $vendor = dirname($vendor);
+    $vendor = \dirname($vendor);
 }
 require $vendor.'/vendor/autoload.php';
 
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/AnalyzeServiceReferencesPass.php b/src/Symfony/Component/DependencyInjection/Compiler/AnalyzeServiceReferencesPass.php
index cafa3d4ed6e2..bc0cc309fca1 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/AnalyzeServiceReferencesPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/AnalyzeServiceReferencesPass.php
@@ -69,7 +69,7 @@ public function process(ContainerBuilder $container)
             if ($definition->getFactoryService(false)) {
                 $this->processArguments(array(new Reference($definition->getFactoryService(false))));
             }
-            if (is_array($definition->getFactory())) {
+            if (\is_array($definition->getFactory())) {
                 $this->processArguments($definition->getFactory());
             }
 
@@ -95,7 +95,7 @@ public function process(ContainerBuilder $container)
     private function processArguments(array $arguments)
     {
         foreach ($arguments as $argument) {
-            if (is_array($argument)) {
+            if (\is_array($argument)) {
                 $this->processArguments($argument);
             } elseif ($argument instanceof Reference) {
                 $this->graph->connect(
@@ -110,7 +110,7 @@ private function processArguments(array $arguments)
                 $this->processArguments($argument->getMethodCalls());
                 $this->processArguments($argument->getProperties());
 
-                if (is_array($argument->getFactory())) {
+                if (\is_array($argument->getFactory())) {
                     $this->processArguments($argument->getFactory());
                 }
                 if ($argument->getFactoryService(false)) {
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/CheckCircularReferencesPass.php b/src/Symfony/Component/DependencyInjection/Compiler/CheckCircularReferencesPass.php
index 1f06fc966009..3cc32a8bd147 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/CheckCircularReferencesPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/CheckCircularReferencesPass.php
@@ -64,7 +64,7 @@ private function checkOutEdges(array $edges)
                     $this->currentPath[] = $id;
 
                     if (false !== $searchKey) {
-                        throw new ServiceCircularReferenceException($id, array_slice($this->currentPath, $searchKey));
+                        throw new ServiceCircularReferenceException($id, \array_slice($this->currentPath, $searchKey));
                     }
 
                     $this->checkOutEdges($node->getOutEdges());
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php b/src/Symfony/Component/DependencyInjection/Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php
index 304f7849516c..4225beae2125 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php
@@ -47,7 +47,7 @@ private function processDefinition(Definition $definition)
     private function processReferences(array $arguments)
     {
         foreach ($arguments as $argument) {
-            if (is_array($argument)) {
+            if (\is_array($argument)) {
                 $this->processReferences($argument);
             } elseif ($argument instanceof Definition) {
                 $this->processDefinition($argument);
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/CheckReferenceValidityPass.php b/src/Symfony/Component/DependencyInjection/Compiler/CheckReferenceValidityPass.php
index 71cb41d6697f..64dcb7b5b3c9 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/CheckReferenceValidityPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/CheckReferenceValidityPass.php
@@ -88,7 +88,7 @@ public function process(ContainerBuilder $container)
     private function validateReferences(array $arguments)
     {
         foreach ($arguments as $argument) {
-            if (is_array($argument)) {
+            if (\is_array($argument)) {
                 $this->validateReferences($argument);
             } elseif ($argument instanceof Reference) {
                 $targetDefinition = $this->getDefinition((string) $argument);
@@ -133,11 +133,11 @@ private function validateScope(Reference $reference, Definition $definition = nu
 
         $id = (string) $reference;
 
-        if (in_array($scope, $this->currentScopeChildren, true)) {
+        if (\in_array($scope, $this->currentScopeChildren, true)) {
             throw new ScopeWideningInjectionException($this->currentId, $this->currentScope, $id, $scope);
         }
 
-        if (!in_array($scope, $this->currentScopeAncestors, true)) {
+        if (!\in_array($scope, $this->currentScopeAncestors, true)) {
             throw new ScopeCrossingInjectionException($this->currentId, $this->currentScope, $id, $scope);
         }
     }
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/InlineServiceDefinitionsPass.php b/src/Symfony/Component/DependencyInjection/Compiler/InlineServiceDefinitionsPass.php
index d987f950d44d..f4c8576e2836 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/InlineServiceDefinitionsPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/InlineServiceDefinitionsPass.php
@@ -63,7 +63,7 @@ private function inlineArguments(ContainerBuilder $container, array $arguments,
             if ($isRoot) {
                 $this->currentId = $k;
             }
-            if (is_array($argument)) {
+            if (\is_array($argument)) {
                 $arguments[$k] = $this->inlineArguments($container, $argument);
             } elseif ($argument instanceof Reference) {
                 if (!$container->hasDefinition($id = (string) $argument)) {
@@ -131,15 +131,15 @@ private function isInlineableDefinition(ContainerBuilder $container, $id, Defini
             $ids[] = $edge->getSourceNode()->getId();
         }
 
-        if (count(array_unique($ids)) > 1) {
+        if (\count(array_unique($ids)) > 1) {
             return false;
         }
 
-        if (count($ids) > 1 && is_array($factory = $definition->getFactory()) && ($factory[0] instanceof Reference || $factory[0] instanceof Definition)) {
+        if (\count($ids) > 1 && \is_array($factory = $definition->getFactory()) && ($factory[0] instanceof Reference || $factory[0] instanceof Definition)) {
             return false;
         }
 
-        if (count($ids) > 1 && $definition->getFactoryService(false)) {
+        if (\count($ids) > 1 && $definition->getFactoryService(false)) {
             return false;
         }
 
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/LoggingFormatter.php b/src/Symfony/Component/DependencyInjection/Compiler/LoggingFormatter.php
index db208fa0d63c..64ffc9e47833 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/LoggingFormatter.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/LoggingFormatter.php
@@ -40,6 +40,6 @@ public function formatResolveInheritance(CompilerPassInterface $pass, $childId,
 
     public function format(CompilerPassInterface $pass, $message)
     {
-        return sprintf('%s: %s', get_class($pass), $message);
+        return sprintf('%s: %s', \get_class($pass), $message);
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/RemoveUnusedDefinitionsPass.php b/src/Symfony/Component/DependencyInjection/Compiler/RemoveUnusedDefinitionsPass.php
index 61602afd8905..911875cf51d5 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/RemoveUnusedDefinitionsPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/RemoveUnusedDefinitionsPass.php
@@ -57,18 +57,18 @@ public function process(ContainerBuilder $container)
                         $referencingAliases[] = $node->getValue();
                     }
                 }
-                $isReferenced = (count(array_unique($sourceIds)) - count($referencingAliases)) > 0;
+                $isReferenced = (\count(array_unique($sourceIds)) - \count($referencingAliases)) > 0;
             } else {
                 $referencingAliases = array();
                 $isReferenced = false;
             }
 
-            if (1 === count($referencingAliases) && false === $isReferenced) {
+            if (1 === \count($referencingAliases) && false === $isReferenced) {
                 $container->setDefinition((string) reset($referencingAliases), $definition);
                 $definition->setPublic(true);
                 $container->removeDefinition($id);
                 $compiler->addLogMessage($formatter->formatRemoveService($this, $id, 'replaces alias '.reset($referencingAliases)));
-            } elseif (0 === count($referencingAliases) && false === $isReferenced) {
+            } elseif (0 === \count($referencingAliases) && false === $isReferenced) {
                 $container->removeDefinition($id);
                 $compiler->addLogMessage($formatter->formatRemoveService($this, $id, 'unused'));
                 $hasChanged = true;
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ReplaceAliasByActualDefinitionPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ReplaceAliasByActualDefinitionPass.php
index bb604b9f9c7f..cf48c53da819 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ReplaceAliasByActualDefinitionPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ReplaceAliasByActualDefinitionPass.php
@@ -93,7 +93,7 @@ private function updateArgumentReferences(array $replacements, $definitionId, ar
     {
         foreach ($arguments as $k => $argument) {
             // Handle recursion step
-            if (is_array($argument)) {
+            if (\is_array($argument)) {
                 $arguments[$k] = $this->updateArgumentReferences($replacements, $definitionId, $argument);
                 continue;
             }
@@ -133,7 +133,7 @@ private function updateFactoryReferenceId(array $replacements, $referenceId)
 
     private function updateFactoryReference(array $replacements, $factory)
     {
-        if (is_array($factory) && $factory[0] instanceof Reference && isset($replacements[$referenceId = (string) $factory[0]])) {
+        if (\is_array($factory) && $factory[0] instanceof Reference && isset($replacements[$referenceId = (string) $factory[0]])) {
             $factory[0] = new Reference($replacements[$referenceId], $factory[0]->getInvalidBehavior());
         }
 
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ResolveDefinitionTemplatesPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ResolveDefinitionTemplatesPass.php
index 5ceebfba3529..2aa79a42c36b 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ResolveDefinitionTemplatesPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ResolveDefinitionTemplatesPass.php
@@ -58,7 +58,7 @@ private function resolveArguments(ContainerBuilder $container, array $arguments,
                 $arguments[$k] = $argument = $container->getDefinition($k);
                 $this->currentId = $k;
             }
-            if (is_array($argument)) {
+            if (\is_array($argument)) {
                 $arguments[$k] = $this->resolveArguments($container, $argument);
             } elseif ($argument instanceof Definition) {
                 if ($argument instanceof DefinitionDecorator) {
@@ -191,7 +191,7 @@ private function resolveDefinition(ContainerBuilder $container, DefinitionDecora
                 throw new RuntimeException(sprintf('Invalid argument key "%s" found.', $k));
             }
 
-            $index = (int) substr($k, strlen('index_'));
+            $index = (int) substr($k, \strlen('index_'));
             $def->replaceArgument($index, $v);
         }
 
@@ -201,7 +201,7 @@ private function resolveDefinition(ContainerBuilder $container, DefinitionDecora
         }
 
         // append method calls
-        if (count($calls = $definition->getMethodCalls()) > 0) {
+        if (\count($calls = $definition->getMethodCalls()) > 0) {
             $def->setMethodCalls(array_merge($def->getMethodCalls(), $calls));
         }
 
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ResolveInvalidReferencesPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ResolveInvalidReferencesPass.php
index 577707de7056..49358e47ae7f 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ResolveInvalidReferencesPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ResolveInvalidReferencesPass.php
@@ -77,7 +77,7 @@ public function process(ContainerBuilder $container)
     private function processArguments(array $arguments, $inMethodCall = false)
     {
         foreach ($arguments as $k => $argument) {
-            if (is_array($argument)) {
+            if (\is_array($argument)) {
                 $arguments[$k] = $this->processArguments($argument, $inMethodCall);
             } elseif ($argument instanceof Reference) {
                 $id = (string) $argument;
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ResolveParameterPlaceHoldersPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ResolveParameterPlaceHoldersPass.php
index d3947565b263..3a31dd55f675 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ResolveParameterPlaceHoldersPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ResolveParameterPlaceHoldersPass.php
@@ -41,7 +41,7 @@ public function process(ContainerBuilder $container)
 
                 $factory = $definition->getFactory();
 
-                if (is_array($factory) && isset($factory[0])) {
+                if (\is_array($factory) && isset($factory[0])) {
                     $factory[0] = $parameterBag->resolveValue($factory[0]);
                     $definition->setFactory($factory);
                 }
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ResolveReferencesToAliasesPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ResolveReferencesToAliasesPass.php
index 24c38cafb013..d95ebbe17559 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ResolveReferencesToAliasesPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ResolveReferencesToAliasesPass.php
@@ -62,7 +62,7 @@ public function process(ContainerBuilder $container)
     private function processArguments(array $arguments)
     {
         foreach ($arguments as $k => $argument) {
-            if (is_array($argument)) {
+            if (\is_array($argument)) {
                 $arguments[$k] = $this->processArguments($argument);
             } elseif ($argument instanceof Reference) {
                 $defId = $this->getDefinitionId($id = (string) $argument);
@@ -87,7 +87,7 @@ private function processFactoryService($factoryService)
 
     private function processFactory($factory)
     {
-        if (null === $factory || !is_array($factory) || !$factory[0] instanceof Reference) {
+        if (null === $factory || !\is_array($factory) || !$factory[0] instanceof Reference) {
             return $factory;
         }
 
diff --git a/src/Symfony/Component/DependencyInjection/Container.php b/src/Symfony/Component/DependencyInjection/Container.php
index 779eb0c5282e..599d11cfcf78 100644
--- a/src/Symfony/Component/DependencyInjection/Container.php
+++ b/src/Symfony/Component/DependencyInjection/Container.php
@@ -157,7 +157,7 @@ public function setParameter($name, $value)
      */
     public function set($id, $service, $scope = self::SCOPE_CONTAINER)
     {
-        if (!in_array($scope, array('container', 'request')) || ('request' === $scope && 'request' !== $id)) {
+        if (!\in_array($scope, array('container', 'request')) || ('request' === $scope && 'request' !== $id)) {
             @trigger_error('The concept of container scopes is deprecated since Symfony 2.8 and will be removed in 3.0. Omit the third parameter.', E_USER_DEPRECATED);
         }
 
@@ -280,7 +280,7 @@ public function get($id, $invalidBehavior = self::EXCEPTION_ON_INVALID_REFERENCE
                     $alternatives = array();
                     foreach ($this->getServiceIds() as $knownId) {
                         $lev = levenshtein($id, $knownId);
-                        if ($lev <= strlen($id) / 3 || false !== strpos($knownId, $id)) {
+                        if ($lev <= \strlen($id) / 3 || false !== strpos($knownId, $id)) {
                             $alternatives[] = $knownId;
                         }
                     }
@@ -410,7 +410,7 @@ public function enterScope($name)
             }
 
             // update global map
-            $this->services = call_user_func_array('array_diff_key', $services);
+            $this->services = \call_user_func_array('array_diff_key', $services);
             array_shift($services);
 
             // add stack entry for this scope so we can restore the removed services later
@@ -456,10 +456,10 @@ public function leaveScope($name)
         }
 
         // update global map
-        $this->services = call_user_func_array('array_diff_key', $services);
+        $this->services = \call_user_func_array('array_diff_key', $services);
 
         // check if we need to restore services of a previous scope of this type
-        if (isset($this->scopeStacks[$name]) && count($this->scopeStacks[$name]) > 0) {
+        if (isset($this->scopeStacks[$name]) && \count($this->scopeStacks[$name]) > 0) {
             $services = $this->scopeStacks[$name]->pop();
             $this->scopedServices += $services;
 
diff --git a/src/Symfony/Component/DependencyInjection/ContainerBuilder.php b/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
index 1960bf9d893b..9f83ceab5b51 100644
--- a/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
+++ b/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
@@ -282,7 +282,7 @@ public function loadFromExtension($extension, array $values = null)
             throw new BadMethodCallException('Cannot load from an extension on a frozen container.');
         }
 
-        if (func_num_args() < 2) {
+        if (\func_num_args() < 2) {
             $values = array();
         }
 
@@ -641,7 +641,7 @@ public function setAlias($alias, $id)
     {
         $alias = strtolower($alias);
 
-        if (is_string($id)) {
+        if (\is_string($id)) {
             $id = new Alias($id);
         } elseif (!$id instanceof Alias) {
             throw new InvalidArgumentException('$id must be a string, or an Alias object.');
@@ -894,15 +894,15 @@ public function createService(Definition $definition, \SplObjectStorage $inlined
         $arguments = $this->doResolveServices($parameterBag->unescapeValue($parameterBag->resolveValue($definition->getArguments())), $inlinedDefinitions);
 
         if (null !== $factory = $definition->getFactory()) {
-            if (is_array($factory)) {
+            if (\is_array($factory)) {
                 $factory = array($this->doResolveServices($parameterBag->resolveValue($factory[0]), $inlinedDefinitions), $factory[1]);
-            } elseif (!is_string($factory)) {
+            } elseif (!\is_string($factory)) {
                 throw new RuntimeException(sprintf('Cannot create service "%s" because of invalid factory', $id));
             }
 
-            $service = call_user_func_array($factory, $arguments);
+            $service = \call_user_func_array($factory, $arguments);
 
-            if (!$definition->isDeprecated() && is_array($factory) && is_string($factory[0])) {
+            if (!$definition->isDeprecated() && \is_array($factory) && \is_string($factory[0])) {
                 $r = new \ReflectionClass($factory[0]);
 
                 if (0 < strpos($r->getDocComment(), "\n * @deprecated ")) {
@@ -918,7 +918,7 @@ public function createService(Definition $definition, \SplObjectStorage $inlined
                 throw new RuntimeException(sprintf('Cannot create service "%s" from factory method without a factory service or factory class.', $id));
             }
 
-            $service = call_user_func_array(array($factory, $definition->getFactoryMethod(false)), $arguments);
+            $service = \call_user_func_array(array($factory, $definition->getFactoryMethod(false)), $arguments);
         } else {
             $r = new \ReflectionClass($parameterBag->resolveValue($definition->getClass()));
 
@@ -944,7 +944,7 @@ public function createService(Definition $definition, \SplObjectStorage $inlined
         }
 
         if ($callable = $definition->getConfigurator()) {
-            if (is_array($callable)) {
+            if (\is_array($callable)) {
                 $callable[0] = $parameterBag->resolveValue($callable[0]);
 
                 if ($callable[0] instanceof Reference) {
@@ -954,11 +954,11 @@ public function createService(Definition $definition, \SplObjectStorage $inlined
                 }
             }
 
-            if (!is_callable($callable)) {
-                throw new InvalidArgumentException(sprintf('The configure callable for class "%s" is not a callable.', get_class($service)));
+            if (!\is_callable($callable)) {
+                throw new InvalidArgumentException(sprintf('The configure callable for class "%s" is not a callable.', \get_class($service)));
             }
 
-            call_user_func($callable, $service);
+            \call_user_func($callable, $service);
         }
 
         return $service;
@@ -979,7 +979,7 @@ public function resolveServices($value)
 
     private function doResolveServices($value, \SplObjectStorage $inlinedDefinitions)
     {
-        if (is_array($value)) {
+        if (\is_array($value)) {
             foreach ($value as $k => $v) {
                 $value[$k] = $this->doResolveServices($v, $inlinedDefinitions);
             }
@@ -1074,7 +1074,7 @@ public static function getServiceConditionals($value)
     {
         $services = array();
 
-        if (is_array($value)) {
+        if (\is_array($value)) {
             foreach ($value as $v) {
                 $services = array_unique(array_merge($services, self::getServiceConditionals($v)));
             }
@@ -1141,7 +1141,7 @@ private function callMethod($service, $call, \SplObjectStorage $inlinedDefinitio
             }
         }
 
-        call_user_func_array(array($service, $call[0]), $this->doResolveServices($this->getParameterBag()->unescapeValue($this->getParameterBag()->resolveValue($call[1])), $inlinedDefinitions));
+        \call_user_func_array(array($service, $call[0]), $this->doResolveServices($this->getParameterBag()->unescapeValue($this->getParameterBag()->resolveValue($call[1])), $inlinedDefinitions));
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Definition.php b/src/Symfony/Component/DependencyInjection/Definition.php
index 56627d4279a2..70f68469e30d 100644
--- a/src/Symfony/Component/DependencyInjection/Definition.php
+++ b/src/Symfony/Component/DependencyInjection/Definition.php
@@ -67,7 +67,7 @@ public function __construct($class = null, array $arguments = array())
      */
     public function setFactory($factory)
     {
-        if (is_string($factory) && false !== strpos($factory, '::')) {
+        if (\is_string($factory) && false !== strpos($factory, '::')) {
             $factory = explode('::', $factory, 2);
         }
 
@@ -326,12 +326,12 @@ public function addArgument($argument)
      */
     public function replaceArgument($index, $argument)
     {
-        if (0 === count($this->arguments)) {
+        if (0 === \count($this->arguments)) {
             throw new OutOfBoundsException('Cannot replace arguments if none have been configured yet.');
         }
 
-        if ($index < 0 || $index > count($this->arguments) - 1) {
-            throw new OutOfBoundsException(sprintf('The index "%d" is not in the range [0, %d].', $index, count($this->arguments) - 1));
+        if ($index < 0 || $index > \count($this->arguments) - 1) {
+            throw new OutOfBoundsException(sprintf('The index "%d" is not in the range [0, %d].', $index, \count($this->arguments) - 1));
         }
 
         $this->arguments[$index] = $argument;
@@ -360,8 +360,8 @@ public function getArguments()
      */
     public function getArgument($index)
     {
-        if ($index < 0 || $index > count($this->arguments) - 1) {
-            throw new OutOfBoundsException(sprintf('The index "%d" is not in the range [0, %d].', $index, count($this->arguments) - 1));
+        if ($index < 0 || $index > \count($this->arguments) - 1) {
+            throw new OutOfBoundsException(sprintf('The index "%d" is not in the range [0, %d].', $index, \count($this->arguments) - 1));
         }
 
         return $this->arguments[$index];
diff --git a/src/Symfony/Component/DependencyInjection/DefinitionDecorator.php b/src/Symfony/Component/DependencyInjection/DefinitionDecorator.php
index 4d0f694aa51f..44e9c0f7d465 100644
--- a/src/Symfony/Component/DependencyInjection/DefinitionDecorator.php
+++ b/src/Symfony/Component/DependencyInjection/DefinitionDecorator.php
@@ -192,7 +192,7 @@ public function getArgument($index)
             return $this->arguments['index_'.$index];
         }
 
-        $lastIndex = count(array_filter(array_keys($this->arguments), 'is_int')) - 1;
+        $lastIndex = \count(array_filter(array_keys($this->arguments), 'is_int')) - 1;
 
         if ($index < 0 || $index > $lastIndex) {
             throw new OutOfBoundsException(sprintf('The index "%d" is not in the range [0, %d].', $index, $lastIndex));
@@ -218,7 +218,7 @@ public function getArgument($index)
      */
     public function replaceArgument($index, $value)
     {
-        if (!is_int($index)) {
+        if (!\is_int($index)) {
             throw new InvalidArgumentException('$index must be an integer.');
         }
 
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/GraphvizDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/GraphvizDumper.php
index 32d3a86ca5a1..aa1150bf4e01 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/GraphvizDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/GraphvizDumper.php
@@ -134,7 +134,7 @@ private function findEdges($id, array $arguments, $required, $name)
         foreach ($arguments as $argument) {
             if ($argument instanceof Parameter) {
                 $argument = $this->container->hasParameter($argument) ? $this->container->getParameter($argument) : null;
-            } elseif (is_string($argument) && preg_match('/^%([^%]+)%$/', $argument, $match)) {
+            } elseif (\is_string($argument) && preg_match('/^%([^%]+)%$/', $argument, $match)) {
                 $argument = $this->container->hasParameter($match[1]) ? $this->container->getParameter($match[1]) : null;
             }
 
@@ -144,7 +144,7 @@ private function findEdges($id, array $arguments, $required, $name)
                 }
 
                 $edges[] = array('name' => $name, 'required' => $required, 'to' => $argument);
-            } elseif (is_array($argument)) {
+            } elseif (\is_array($argument)) {
                 $edges = array_merge($edges, $this->findEdges($id, $argument, $required, $name));
             }
         }
@@ -187,7 +187,7 @@ private function findNodes()
             }
 
             if (!$container->hasDefinition($id)) {
-                $class = ('service_container' === $id) ? get_class($this->container) : get_class($service);
+                $class = ('service_container' === $id) ? \get_class($this->container) : \get_class($service);
                 $nodes[$id] = array('class' => str_replace('\\', '\\\\', $class), 'attributes' => $this->options['node.instance']);
             }
         }
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index 64952b6f7e8f..f9e5a6eee595 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -106,13 +106,13 @@ public function dump(array $options = array())
         ), $options);
         $this->docStar = $options['debug'] ? '*' : '';
 
-        if (!empty($options['file']) && is_dir($dir = dirname($options['file']))) {
+        if (!empty($options['file']) && is_dir($dir = \dirname($options['file']))) {
             // Build a regexp where the first root dirs are mandatory,
             // but every other sub-dir is optional up to the full path in $dir
             // Mandate at least 2 root dirs and not more that 5 optional dirs.
 
             $dir = explode(DIRECTORY_SEPARATOR, realpath($dir));
-            $i = count($dir);
+            $i = \count($dir);
 
             if (3 <= $i) {
                 $regex = '';
@@ -515,7 +515,7 @@ private function addServiceConfigurator(Definition $definition, $variableName =
             return '';
         }
 
-        if (is_array($callable)) {
+        if (\is_array($callable)) {
             if ($callable[0] instanceof Reference
                 || ($callable[0] instanceof Definition && $this->definitionVariables->contains($callable[0]))) {
                 return sprintf("        %s->%s(\$%s);\n", $this->dumpValue($callable[0]), $callable[1], $variableName);
@@ -555,10 +555,10 @@ private function addService($id, Definition $definition)
             $return[] = sprintf(0 === strpos($class, '%') ? '@return object A %1$s instance' : '@return \%s', ltrim($class, '\\'));
         } elseif ($definition->getFactory()) {
             $factory = $definition->getFactory();
-            if (is_string($factory)) {
+            if (\is_string($factory)) {
                 $return[] = sprintf('@return object An instance returned by %s()', $factory);
-            } elseif (is_array($factory) && (is_string($factory[0]) || $factory[0] instanceof Definition || $factory[0] instanceof Reference)) {
-                if (is_string($factory[0]) || $factory[0] instanceof Reference) {
+            } elseif (\is_array($factory) && (\is_string($factory[0]) || $factory[0] instanceof Definition || $factory[0] instanceof Reference)) {
+                if (\is_string($factory[0]) || $factory[0] instanceof Reference) {
                     $return[] = sprintf('@return object An instance returned by %s::%s()', (string) $factory[0], $factory[1]);
                 } elseif ($factory[0] instanceof Definition) {
                     $return[] = sprintf('@return object An instance returned by %s::%s()', $factory[0]->getClass(), $factory[1]);
@@ -571,15 +571,15 @@ private function addService($id, Definition $definition)
         }
 
         $scope = $definition->getScope(false);
-        if (!in_array($scope, array(ContainerInterface::SCOPE_CONTAINER, ContainerInterface::SCOPE_PROTOTYPE))) {
-            if ($return && 0 === strpos($return[count($return) - 1], '@return')) {
+        if (!\in_array($scope, array(ContainerInterface::SCOPE_CONTAINER, ContainerInterface::SCOPE_PROTOTYPE))) {
+            if ($return && 0 === strpos($return[\count($return) - 1], '@return')) {
                 $return[] = '';
             }
             $return[] = sprintf("@throws InactiveScopeException when the '%s' service is requested while the '%s' scope is not active", $id, $scope);
         }
 
         if ($definition->isDeprecated()) {
-            if ($return && 0 === strpos($return[count($return) - 1], '@return')) {
+            if ($return && 0 === strpos($return[\count($return) - 1], '@return')) {
                 $return[] = '';
             }
 
@@ -615,7 +615,7 @@ private function addService($id, Definition $definition)
 
         $code .= $isProxyCandidate ? $this->getProxyDumper()->getProxyFactoryCode($definition, $id) : '';
 
-        if (!in_array($scope, array(ContainerInterface::SCOPE_CONTAINER, ContainerInterface::SCOPE_PROTOTYPE))) {
+        if (!\in_array($scope, array(ContainerInterface::SCOPE_CONTAINER, ContainerInterface::SCOPE_PROTOTYPE))) {
             $code .= <<<EOF
         if (!isset(\$this->scopedServices['$scope'])) {
             throw new InactiveScopeException('$id', '$scope');
@@ -744,7 +744,7 @@ private function addNewInstance($id, Definition $definition, $return, $instantia
 
         if (null !== $definition->getFactory()) {
             $callable = $definition->getFactory();
-            if (is_array($callable)) {
+            if (\is_array($callable)) {
                 if (!preg_match('/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/', $callable[1])) {
                     throw new RuntimeException(sprintf('Cannot dump definition because of invalid factory method (%s)', $callable[1] ?: 'n/a'));
                 }
@@ -845,7 +845,7 @@ public function __construct()
 
 EOF;
 
-        if (count($scopes = $this->container->getScopes(false)) > 0) {
+        if (\count($scopes = $this->container->getScopes(false)) > 0) {
             $code .= "\n";
             $code .= '        $this->scopes = '.$this->dumpValue($scopes).";\n";
             $code .= '        $this->scopeChildren = '.$this->dumpValue($this->container->getScopeChildren(false)).";\n";
@@ -889,7 +889,7 @@ public function __construct()
 EOF;
 
         $code .= "\n";
-        if (count($scopes = $this->container->getScopes(false)) > 0) {
+        if (\count($scopes = $this->container->getScopes(false)) > 0) {
             $code .= '        $this->scopes = '.$this->dumpValue($scopes).";\n";
             $code .= '        $this->scopeChildren = '.$this->dumpValue($this->container->getScopeChildren(false)).";\n";
         } else {
@@ -1091,7 +1091,7 @@ private function exportParameters(array $parameters, $path = '', $indent = 12)
     {
         $php = array();
         foreach ($parameters as $key => $value) {
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 $value = $this->exportParameters($value, $path.'/'.$key, $indent + 4);
             } elseif ($value instanceof Variable) {
                 throw new InvalidArgumentException(sprintf('You cannot dump a container with parameters that contain variable references. Variable "%s" found in "%s".', $value, $path.'/'.$key));
@@ -1155,7 +1155,7 @@ private function wrapServiceConditionals($value, $code)
     private function getServiceCallsFromArguments(array $arguments, array &$calls, array &$behavior)
     {
         foreach ($arguments as $argument) {
-            if (is_array($argument)) {
+            if (\is_array($argument)) {
                 $this->getServiceCallsFromArguments($argument, $calls, $behavior);
             } elseif ($argument instanceof Reference) {
                 $id = (string) $argument;
@@ -1207,7 +1207,7 @@ private function getDefinitionsFromArguments(array $arguments)
     {
         $definitions = array();
         foreach ($arguments as $argument) {
-            if (is_array($argument)) {
+            if (\is_array($argument)) {
                 $definitions = array_merge($definitions, $this->getDefinitionsFromArguments($argument));
             } elseif ($argument instanceof Definition) {
                 $definitions = array_merge(
@@ -1234,7 +1234,7 @@ private function getDefinitionsFromArguments(array $arguments)
     private function hasReference($id, array $arguments, $deep = false, array &$visited = array())
     {
         foreach ($arguments as $argument) {
-            if (is_array($argument)) {
+            if (\is_array($argument)) {
                 if ($this->hasReference($id, $argument, $deep, $visited)) {
                     return true;
                 }
@@ -1279,7 +1279,7 @@ private function hasReference($id, array $arguments, $deep = false, array &$visi
      */
     private function dumpValue($value, $interpolate = true)
     {
-        if (is_array($value)) {
+        if (\is_array($value)) {
             $code = array();
             foreach ($value as $k => $v) {
                 $code[] = sprintf('%s => %s', $this->dumpValue($k, $interpolate), $this->dumpValue($v, $interpolate));
@@ -1308,21 +1308,21 @@ private function dumpValue($value, $interpolate = true)
             if (null !== $value->getFactory()) {
                 $factory = $value->getFactory();
 
-                if (is_string($factory)) {
+                if (\is_string($factory)) {
                     return sprintf('\\%s(%s)', $factory, implode(', ', $arguments));
                 }
 
-                if (is_array($factory)) {
+                if (\is_array($factory)) {
                     if (!preg_match('/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/', $factory[1])) {
                         throw new RuntimeException(sprintf('Cannot dump definition because of invalid factory method (%s)', $factory[1] ?: 'n/a'));
                     }
 
-                    if (is_string($factory[0])) {
+                    if (\is_string($factory[0])) {
                         return sprintf('%s::%s(%s)', $this->dumpLiteralClass($this->dumpValue($factory[0])), $factory[1], implode(', ', $arguments));
                     }
 
                     if ($factory[0] instanceof Definition) {
-                        return sprintf("call_user_func(array(%s, '%s')%s)", $this->dumpValue($factory[0]), $factory[1], count($arguments) > 0 ? ', '.implode(', ', $arguments) : '');
+                        return sprintf("call_user_func(array(%s, '%s')%s)", $this->dumpValue($factory[0]), $factory[1], \count($arguments) > 0 ? ', '.implode(', ', $arguments) : '');
                     }
 
                     if ($factory[0] instanceof Reference) {
@@ -1335,7 +1335,7 @@ private function dumpValue($value, $interpolate = true)
 
             if (null !== $value->getFactoryMethod(false)) {
                 if (null !== $value->getFactoryClass(false)) {
-                    return sprintf("call_user_func(array(%s, '%s')%s)", $this->dumpValue($value->getFactoryClass(false)), $value->getFactoryMethod(false), count($arguments) > 0 ? ', '.implode(', ', $arguments) : '');
+                    return sprintf("call_user_func(array(%s, '%s')%s)", $this->dumpValue($value->getFactoryClass(false)), $value->getFactoryMethod(false), \count($arguments) > 0 ? ', '.implode(', ', $arguments) : '');
                 } elseif (null !== $value->getFactoryService(false)) {
                     $service = $this->dumpValue($value->getFactoryService(false));
 
@@ -1363,7 +1363,7 @@ private function dumpValue($value, $interpolate = true)
             return $this->getExpressionLanguage()->compile((string) $value, array('this' => 'container'));
         } elseif ($value instanceof Parameter) {
             return $this->dumpParameter($value);
-        } elseif (true === $interpolate && is_string($value)) {
+        } elseif (true === $interpolate && \is_string($value)) {
             if (preg_match('/^%([^%]+)%$/', $value, $match)) {
                 // we do this to deal with non string values (Boolean, integer, ...)
                 // the preg_replace_callback converts them to strings
@@ -1378,7 +1378,7 @@ private function dumpValue($value, $interpolate = true)
 
                 return $code;
             }
-        } elseif (is_object($value) || is_resource($value)) {
+        } elseif (\is_object($value) || \is_resource($value)) {
             throw new RuntimeException('Unable to dump a service container if a parameter is an object or a resource.');
         }
 
@@ -1490,9 +1490,9 @@ private function camelize($id)
     private function getNextVariableName()
     {
         $firstChars = self::FIRST_CHARS;
-        $firstCharsLength = strlen($firstChars);
+        $firstCharsLength = \strlen($firstChars);
         $nonFirstChars = self::NON_FIRST_CHARS;
-        $nonFirstCharsLength = strlen($nonFirstChars);
+        $nonFirstCharsLength = \strlen($nonFirstChars);
 
         while (true) {
             $name = '';
@@ -1512,7 +1512,7 @@ private function getNextVariableName()
             ++$this->variableCount;
 
             // check that the name is not reserved
-            if (in_array($name, $this->reservedVariables, true)) {
+            if (\in_array($name, $this->reservedVariables, true)) {
                 continue;
             }
 
@@ -1552,13 +1552,13 @@ private function exportTargetDirs()
 
     private function export($value)
     {
-        if (null !== $this->targetDirRegex && is_string($value) && preg_match($this->targetDirRegex, $value, $matches, PREG_OFFSET_CAPTURE)) {
+        if (null !== $this->targetDirRegex && \is_string($value) && preg_match($this->targetDirRegex, $value, $matches, PREG_OFFSET_CAPTURE)) {
             $prefix = $matches[0][1] ? var_export(substr($value, 0, $matches[0][1]), true).'.' : '';
-            $suffix = $matches[0][1] + strlen($matches[0][0]);
+            $suffix = $matches[0][1] + \strlen($matches[0][0]);
             $suffix = isset($value[$suffix]) ? '.'.var_export(substr($value, $suffix), true) : '';
             $dirname = '__DIR__';
 
-            if (0 < $offset = 1 + $this->targetDirMaxMatches - count($matches)) {
+            if (0 < $offset = 1 + $this->targetDirMaxMatches - \count($matches)) {
                 $dirname = sprintf('$this->targetDirs[%d]', $offset);
             }
 
@@ -1569,7 +1569,7 @@ private function export($value)
             return $dirname;
         }
 
-        if (is_string($value) && false !== strpos($value, "\n")) {
+        if (\is_string($value) && false !== strpos($value, "\n")) {
             $cleanParts = explode("\n", $value);
             $cleanParts = array_map(function ($part) { return var_export($part, true); }, $cleanParts);
 
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php
index 3aed23912f02..709c463d2ca1 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php
@@ -77,7 +77,7 @@ private function addMethodCalls(array $methodcalls, \DOMElement $parent)
         foreach ($methodcalls as $methodcall) {
             $call = $this->document->createElement('call');
             $call->setAttribute('method', $methodcall[0]);
-            if (count($methodcall[1])) {
+            if (\count($methodcall[1])) {
                 $this->convertParameters($methodcall[1], 'argument', $call);
             }
             $parent->appendChild($call);
@@ -172,10 +172,10 @@ private function addService($definition, $id, \DOMElement $parent)
         if ($callable = $definition->getFactory()) {
             $factory = $this->document->createElement('factory');
 
-            if (is_array($callable) && $callable[0] instanceof Definition) {
+            if (\is_array($callable) && $callable[0] instanceof Definition) {
                 $this->addService($callable[0], null, $factory);
                 $factory->setAttribute('method', $callable[1]);
-            } elseif (is_array($callable)) {
+            } elseif (\is_array($callable)) {
                 $factory->setAttribute($callable[0] instanceof Reference ? 'service' : 'class', $callable[0]);
                 $factory->setAttribute('method', $callable[1]);
             } else {
@@ -209,10 +209,10 @@ private function addService($definition, $id, \DOMElement $parent)
         if ($callable = $definition->getConfigurator()) {
             $configurator = $this->document->createElement('configurator');
 
-            if (is_array($callable) && $callable[0] instanceof Definition) {
+            if (\is_array($callable) && $callable[0] instanceof Definition) {
                 $this->addService($callable[0], null, $configurator);
                 $configurator->setAttribute('method', $callable[1]);
-            } elseif (is_array($callable)) {
+            } elseif (\is_array($callable)) {
                 $configurator->setAttribute($callable[0] instanceof Reference ? 'service' : 'class', $callable[0]);
                 $configurator->setAttribute('method', $callable[1]);
             } else {
@@ -274,14 +274,14 @@ private function addServices(\DOMElement $parent)
      */
     private function convertParameters(array $parameters, $type, \DOMElement $parent, $keyAttribute = 'key')
     {
-        $withKeys = array_keys($parameters) !== range(0, count($parameters) - 1);
+        $withKeys = array_keys($parameters) !== range(0, \count($parameters) - 1);
         foreach ($parameters as $key => $value) {
             $element = $this->document->createElement($type);
             if ($withKeys) {
                 $element->setAttribute($keyAttribute, $key);
             }
 
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 $element->setAttribute('type', 'collection');
                 $this->convertParameters($value, $type, $element, 'key');
             } elseif ($value instanceof Reference) {
@@ -304,7 +304,7 @@ private function convertParameters(array $parameters, $type, \DOMElement $parent
                 $text = $this->document->createTextNode(self::phpToXml((string) $value));
                 $element->appendChild($text);
             } else {
-                if (in_array($value, array('null', 'true', 'false'), true)) {
+                if (\in_array($value, array('null', 'true', 'false'), true)) {
                     $element->setAttribute('type', 'string');
                 }
                 $text = $this->document->createTextNode(self::phpToXml($value));
@@ -323,9 +323,9 @@ private function escape(array $arguments)
     {
         $args = array();
         foreach ($arguments as $k => $v) {
-            if (is_array($v)) {
+            if (\is_array($v)) {
                 $args[$k] = $this->escape($v);
-            } elseif (is_string($v)) {
+            } elseif (\is_string($v)) {
                 $args[$k] = str_replace('%', '%%', $v);
             } else {
                 $args[$k] = $v;
@@ -355,7 +355,7 @@ public static function phpToXml($value)
                 return 'false';
             case $value instanceof Parameter:
                 return '%'.$value.'%';
-            case is_object($value) || is_resource($value):
+            case \is_object($value) || \is_resource($value):
                 throw new RuntimeException('Unable to dump a service container if a parameter is an object or a resource.');
             default:
                 return (string) $value;
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php
index 149fd5b33ff2..4a92ffb834af 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php
@@ -245,7 +245,7 @@ private function addParameters()
      */
     private function dumpCallable($callable)
     {
-        if (is_array($callable)) {
+        if (\is_array($callable)) {
             if ($callable[0] instanceof Reference) {
                 $callable = array($this->getServiceCall((string) $callable[0], $callable[0]), $callable[1]);
             } else {
@@ -267,7 +267,7 @@ private function dumpCallable($callable)
      */
     private function dumpValue($value)
     {
-        if (is_array($value)) {
+        if (\is_array($value)) {
             $code = array();
             foreach ($value as $k => $v) {
                 $code[$k] = $this->dumpValue($v);
@@ -280,7 +280,7 @@ private function dumpValue($value)
             return $this->getParameterCall((string) $value);
         } elseif ($value instanceof Expression) {
             return $this->getExpressionCall((string) $value);
-        } elseif (is_object($value) || is_resource($value)) {
+        } elseif (\is_object($value) || \is_resource($value)) {
             throw new RuntimeException('Unable to dump a service container if a parameter is an object or a resource.');
         }
 
@@ -333,9 +333,9 @@ private function prepareParameters(array $parameters, $escape = true)
     {
         $filtered = array();
         foreach ($parameters as $key => $value) {
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 $value = $this->prepareParameters($value, $escape);
-            } elseif ($value instanceof Reference || is_string($value) && 0 === strpos($value, '@')) {
+            } elseif ($value instanceof Reference || \is_string($value) && 0 === strpos($value, '@')) {
                 $value = '@'.$value;
             }
 
@@ -354,9 +354,9 @@ private function escape(array $arguments)
     {
         $args = array();
         foreach ($arguments as $k => $v) {
-            if (is_array($v)) {
+            if (\is_array($v)) {
                 $args[$k] = $this->escape($v);
-            } elseif (is_string($v)) {
+            } elseif (\is_string($v)) {
                 $args[$k] = str_replace('%', '%%', $v);
             } else {
                 $args[$k] = $v;
diff --git a/src/Symfony/Component/DependencyInjection/Exception/ParameterNotFoundException.php b/src/Symfony/Component/DependencyInjection/Exception/ParameterNotFoundException.php
index ab7b86d5acc9..1d97830f4a9b 100644
--- a/src/Symfony/Component/DependencyInjection/Exception/ParameterNotFoundException.php
+++ b/src/Symfony/Component/DependencyInjection/Exception/ParameterNotFoundException.php
@@ -53,7 +53,7 @@ public function updateRepr()
         }
 
         if ($this->alternatives) {
-            if (1 == count($this->alternatives)) {
+            if (1 == \count($this->alternatives)) {
                 $this->message .= ' Did you mean this: "';
             } else {
                 $this->message .= ' Did you mean one of these: "';
diff --git a/src/Symfony/Component/DependencyInjection/Exception/ServiceNotFoundException.php b/src/Symfony/Component/DependencyInjection/Exception/ServiceNotFoundException.php
index e65da506bb51..620ed98e68e7 100644
--- a/src/Symfony/Component/DependencyInjection/Exception/ServiceNotFoundException.php
+++ b/src/Symfony/Component/DependencyInjection/Exception/ServiceNotFoundException.php
@@ -30,7 +30,7 @@ public function __construct($id, $sourceId = null, \Exception $previous = null,
         }
 
         if ($alternatives) {
-            if (1 == count($alternatives)) {
+            if (1 == \count($alternatives)) {
                 $msg .= ' Did you mean this: "';
             } else {
                 $msg .= ' Did you mean one of these: "';
diff --git a/src/Symfony/Component/DependencyInjection/Extension/Extension.php b/src/Symfony/Component/DependencyInjection/Extension/Extension.php
index 224d18a44d67..7aa7212a92c2 100644
--- a/src/Symfony/Component/DependencyInjection/Extension/Extension.php
+++ b/src/Symfony/Component/DependencyInjection/Extension/Extension.php
@@ -64,7 +64,7 @@ public function getNamespace()
      */
     public function getAlias()
     {
-        $className = get_class($this);
+        $className = \get_class($this);
         if ('Extension' != substr($className, -9)) {
             throw new BadMethodCallException('This extension does not follow the naming convention; you must overwrite the getAlias() method.');
         }
diff --git a/src/Symfony/Component/DependencyInjection/LazyProxy/Instantiator/RealServiceInstantiator.php b/src/Symfony/Component/DependencyInjection/LazyProxy/Instantiator/RealServiceInstantiator.php
index cad9320039b1..3b0b57ef0f6b 100644
--- a/src/Symfony/Component/DependencyInjection/LazyProxy/Instantiator/RealServiceInstantiator.php
+++ b/src/Symfony/Component/DependencyInjection/LazyProxy/Instantiator/RealServiceInstantiator.php
@@ -28,6 +28,6 @@ class RealServiceInstantiator implements InstantiatorInterface
      */
     public function instantiateProxy(ContainerInterface $container, Definition $definition, $id, $realInstantiator)
     {
-        return call_user_func($realInstantiator);
+        return \call_user_func($realInstantiator);
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Loader/ClosureLoader.php b/src/Symfony/Component/DependencyInjection/Loader/ClosureLoader.php
index f8f2efe2e9e6..170b3154778e 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/ClosureLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/ClosureLoader.php
@@ -35,7 +35,7 @@ public function __construct(ContainerBuilder $container)
      */
     public function load($resource, $type = null)
     {
-        call_user_func($resource, $this->container);
+        \call_user_func($resource, $this->container);
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Loader/DirectoryLoader.php b/src/Symfony/Component/DependencyInjection/Loader/DirectoryLoader.php
index ffb885301113..05a3ba2b5c3a 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/DirectoryLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/DirectoryLoader.php
@@ -51,6 +51,6 @@ public function supports($resource, $type = null)
             return true;
         }
 
-        return null === $type && is_string($resource) && '/' === substr($resource, -1);
+        return null === $type && \is_string($resource) && '/' === substr($resource, -1);
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Loader/IniFileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/IniFileLoader.php
index 16ddf87f8511..fa8cbbf2875f 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/IniFileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/IniFileLoader.php
@@ -35,7 +35,7 @@ public function load($resource, $type = null)
             throw new InvalidArgumentException(sprintf('The "%s" file is not valid.', $resource));
         }
 
-        if (isset($result['parameters']) && is_array($result['parameters'])) {
+        if (isset($result['parameters']) && \is_array($result['parameters'])) {
             foreach ($result['parameters'] as $key => $value) {
                 $this->container->setParameter($key, $value);
             }
@@ -47,6 +47,6 @@ public function load($resource, $type = null)
      */
     public function supports($resource, $type = null)
     {
-        return is_string($resource) && 'ini' === pathinfo($resource, PATHINFO_EXTENSION);
+        return \is_string($resource) && 'ini' === pathinfo($resource, PATHINFO_EXTENSION);
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Loader/PhpFileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/PhpFileLoader.php
index 08c1d9af4f65..c52bd8c98cca 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/PhpFileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/PhpFileLoader.php
@@ -33,7 +33,7 @@ public function load($resource, $type = null)
         $loader = $this;
 
         $path = $this->locator->locate($resource);
-        $this->setCurrentDir(dirname($path));
+        $this->setCurrentDir(\dirname($path));
         $this->container->addResource(new FileResource($path));
 
         include $path;
@@ -44,6 +44,6 @@ public function load($resource, $type = null)
      */
     public function supports($resource, $type = null)
     {
-        return is_string($resource) && 'php' === pathinfo($resource, PATHINFO_EXTENSION);
+        return \is_string($resource) && 'php' === pathinfo($resource, PATHINFO_EXTENSION);
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
index d2d1ea5ab913..19f46b80ef81 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
@@ -63,7 +63,7 @@ public function load($resource, $type = null)
      */
     public function supports($resource, $type = null)
     {
-        return is_string($resource) && 'xml' === pathinfo($resource, PATHINFO_EXTENSION);
+        return \is_string($resource) && 'xml' === pathinfo($resource, PATHINFO_EXTENSION);
     }
 
     /**
@@ -93,7 +93,7 @@ private function parseImports(\DOMDocument $xml, $file)
             return;
         }
 
-        $defaultDirectory = dirname($file);
+        $defaultDirectory = \dirname($file);
         foreach ($imports as $import) {
             $this->setCurrentDir($defaultDirectory);
             $this->import($import->getAttribute('resource'), null, (bool) XmlUtils::phpize($import->getAttribute('ignore-errors')), $file);
@@ -150,7 +150,7 @@ private function parseDefinition(\DOMElement $service, $file)
 
         foreach (array('class', 'shared', 'public', 'factory-class', 'factory-method', 'factory-service', 'synthetic', 'lazy', 'abstract') as $key) {
             if ($value = $service->getAttribute($key)) {
-                if (in_array($key, array('factory-class', 'factory-method', 'factory-service'))) {
+                if (\in_array($key, array('factory-class', 'factory-method', 'factory-service'))) {
                     @trigger_error(sprintf('The "%s" attribute of service "%s" in file "%s" is deprecated since Symfony 2.6 and will be removed in 3.0. Use the "factory" element instead.', $key, (string) $service->getAttribute('id'), $file), E_USER_DEPRECATED);
                 }
                 $method = 'set'.str_replace('-', '', $key);
@@ -417,7 +417,7 @@ private function getArgumentsAsPhp(\DOMElement $node, $name, $lowercase = true)
                     $arguments[$key] = $arg->nodeValue;
                     break;
                 case 'constant':
-                    $arguments[$key] = constant(trim($arg->nodeValue));
+                    $arguments[$key] = \constant(trim($arg->nodeValue));
                     break;
                 default:
                     $arguments[$key] = XmlUtils::phpize($arg->nodeValue);
@@ -462,7 +462,7 @@ public function validateSchema(\DOMDocument $dom)
 
         if ($element = $dom->documentElement->getAttributeNS('http://www.w3.org/2001/XMLSchema-instance', 'schemaLocation')) {
             $items = preg_split('/\s+/', $element);
-            for ($i = 0, $nb = count($items); $i < $nb; $i += 2) {
+            for ($i = 0, $nb = \count($items); $i < $nb; $i += 2) {
                 if (!$this->container->hasExtension($items[$i])) {
                     continue;
                 }
@@ -471,7 +471,7 @@ public function validateSchema(\DOMDocument $dom)
                     $path = str_replace($extension->getNamespace(), str_replace('\\', '/', $extension->getXsdValidationBasePath()).'/', $items[$i + 1]);
 
                     if (!is_file($path)) {
-                        throw new RuntimeException(sprintf('Extension "%s" references a non-existent XSD file "%s"', get_class($extension), $path));
+                        throw new RuntimeException(sprintf('Extension "%s" references a non-existent XSD file "%s"', \get_class($extension), $path));
                     }
 
                     $schemaLocations[$items[$i]] = $path;
@@ -567,7 +567,7 @@ private function loadFromExtensions(\DOMDocument $xml)
             }
 
             $values = static::convertDomElementToArray($node);
-            if (!is_array($values)) {
+            if (!\is_array($values)) {
                 $values = array();
             }
 
diff --git a/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
index c60155338682..7de30de86d07 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
@@ -55,7 +55,7 @@ public function load($resource, $type = null)
 
         // parameters
         if (isset($content['parameters'])) {
-            if (!is_array($content['parameters'])) {
+            if (!\is_array($content['parameters'])) {
                 throw new InvalidArgumentException(sprintf('The "parameters" key should contain an array in %s. Check your YAML syntax.', $resource));
             }
 
@@ -76,7 +76,7 @@ public function load($resource, $type = null)
      */
     public function supports($resource, $type = null)
     {
-        return is_string($resource) && in_array(pathinfo($resource, PATHINFO_EXTENSION), array('yml', 'yaml'), true);
+        return \is_string($resource) && \in_array(pathinfo($resource, PATHINFO_EXTENSION), array('yml', 'yaml'), true);
     }
 
     /**
@@ -91,13 +91,13 @@ private function parseImports(array $content, $file)
             return;
         }
 
-        if (!is_array($content['imports'])) {
+        if (!\is_array($content['imports'])) {
             throw new InvalidArgumentException(sprintf('The "imports" key should contain an array in %s. Check your YAML syntax.', $file));
         }
 
-        $defaultDirectory = dirname($file);
+        $defaultDirectory = \dirname($file);
         foreach ($content['imports'] as $import) {
-            if (!is_array($import)) {
+            if (!\is_array($import)) {
                 throw new InvalidArgumentException(sprintf('The values in the "imports" key should be arrays in %s. Check your YAML syntax.', $file));
             }
 
@@ -118,7 +118,7 @@ private function parseDefinitions(array $content, $file)
             return;
         }
 
-        if (!is_array($content['services'])) {
+        if (!\is_array($content['services'])) {
             throw new InvalidArgumentException(sprintf('The "services" key should contain an array in %s. Check your YAML syntax.', $file));
         }
 
@@ -138,14 +138,14 @@ private function parseDefinitions(array $content, $file)
      */
     private function parseDefinition($id, $service, $file)
     {
-        if (is_string($service) && 0 === strpos($service, '@')) {
+        if (\is_string($service) && 0 === strpos($service, '@')) {
             $this->container->setAlias($id, substr($service, 1));
 
             return;
         }
 
-        if (!is_array($service)) {
-            throw new InvalidArgumentException(sprintf('A service definition must be an array or a string starting with "@" but %s found for service "%s" in %s. Check your YAML syntax.', gettype($service), $id, $file));
+        if (!\is_array($service)) {
+            throw new InvalidArgumentException(sprintf('A service definition must be an array or a string starting with "@" but %s found for service "%s" in %s. Check your YAML syntax.', \gettype($service), $id, $file));
         }
 
         if (isset($service['alias'])) {
@@ -202,7 +202,7 @@ private function parseDefinition($id, $service, $file)
         }
 
         if (isset($service['factory'])) {
-            if (is_string($service['factory'])) {
+            if (\is_string($service['factory'])) {
                 if (false !== strpos($service['factory'], ':') && false === strpos($service['factory'], '::')) {
                     $parts = explode(':', $service['factory']);
                     $definition->setFactory(array($this->resolveServices('@'.$parts[0]), $parts[1]));
@@ -242,7 +242,7 @@ private function parseDefinition($id, $service, $file)
         }
 
         if (isset($service['configurator'])) {
-            if (is_string($service['configurator'])) {
+            if (\is_string($service['configurator'])) {
                 $definition->setConfigurator($service['configurator']);
             } else {
                 $definition->setConfigurator(array($this->resolveServices($service['configurator'][0]), $service['configurator'][1]));
@@ -250,7 +250,7 @@ private function parseDefinition($id, $service, $file)
         }
 
         if (isset($service['calls'])) {
-            if (!is_array($service['calls'])) {
+            if (!\is_array($service['calls'])) {
                 throw new InvalidArgumentException(sprintf('Parameter "calls" must be an array for service "%s" in %s. Check your YAML syntax.', $id, $file));
             }
 
@@ -268,12 +268,12 @@ private function parseDefinition($id, $service, $file)
         }
 
         if (isset($service['tags'])) {
-            if (!is_array($service['tags'])) {
+            if (!\is_array($service['tags'])) {
                 throw new InvalidArgumentException(sprintf('Parameter "tags" must be an array for service "%s" in %s. Check your YAML syntax.', $id, $file));
             }
 
             foreach ($service['tags'] as $tag) {
-                if (!is_array($tag)) {
+                if (!\is_array($tag)) {
                     throw new InvalidArgumentException(sprintf('A "tags" entry must be an array for service "%s" in %s. Check your YAML syntax.', $id, $file));
                 }
 
@@ -281,7 +281,7 @@ private function parseDefinition($id, $service, $file)
                     throw new InvalidArgumentException(sprintf('A "tags" entry is missing a "name" key for service "%s" in %s.', $id, $file));
                 }
 
-                if (!is_string($tag['name']) || '' === $tag['name']) {
+                if (!\is_string($tag['name']) || '' === $tag['name']) {
                     throw new InvalidArgumentException(sprintf('The tag name for service "%s" in %s must be a non-empty string.', $id, $file));
                 }
 
@@ -313,15 +313,15 @@ private function parseDefinition($id, $service, $file)
         }
 
         if (isset($service['autowiring_types'])) {
-            if (is_string($service['autowiring_types'])) {
+            if (\is_string($service['autowiring_types'])) {
                 $definition->addAutowiringType($service['autowiring_types']);
             } else {
-                if (!is_array($service['autowiring_types'])) {
+                if (!\is_array($service['autowiring_types'])) {
                     throw new InvalidArgumentException(sprintf('Parameter "autowiring_types" must be a string or an array for service "%s" in %s. Check your YAML syntax.', $id, $file));
                 }
 
                 foreach ($service['autowiring_types'] as $autowiringType) {
-                    if (!is_string($autowiringType)) {
+                    if (!\is_string($autowiringType)) {
                         throw new InvalidArgumentException(sprintf('A "autowiring_types" attribute must be of type string for service "%s" in %s. Check your YAML syntax.', $id, $file));
                     }
 
@@ -385,12 +385,12 @@ private function validate($content, $file)
             return $content;
         }
 
-        if (!is_array($content)) {
+        if (!\is_array($content)) {
             throw new InvalidArgumentException(sprintf('The service file "%s" is not valid. It should contain an array. Check your YAML syntax.', $file));
         }
 
         foreach ($content as $namespace => $data) {
-            if (in_array($namespace, array('imports', 'parameters', 'services'))) {
+            if (\in_array($namespace, array('imports', 'parameters', 'services'))) {
                 continue;
             }
 
@@ -418,11 +418,11 @@ private function validate($content, $file)
      */
     private function resolveServices($value)
     {
-        if (is_array($value)) {
+        if (\is_array($value)) {
             $value = array_map(array($this, 'resolveServices'), $value);
-        } elseif (is_string($value) && 0 === strpos($value, '@=')) {
+        } elseif (\is_string($value) && 0 === strpos($value, '@=')) {
             return new Expression(substr($value, 2));
-        } elseif (is_string($value) && 0 === strpos($value, '@')) {
+        } elseif (\is_string($value) && 0 === strpos($value, '@')) {
             if (0 === strpos($value, '@@')) {
                 $value = substr($value, 1);
                 $invalidBehavior = null;
@@ -455,11 +455,11 @@ private function resolveServices($value)
     private function loadFromExtensions(array $content)
     {
         foreach ($content as $namespace => $values) {
-            if (in_array($namespace, array('imports', 'parameters', 'services'))) {
+            if (\in_array($namespace, array('imports', 'parameters', 'services'))) {
                 continue;
             }
 
-            if (!is_array($values) && null !== $values) {
+            if (!\is_array($values) && null !== $values) {
                 $values = array();
             }
 
diff --git a/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php b/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php
index dbfa5b6ae594..272b8d91510a 100644
--- a/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php
+++ b/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php
@@ -76,7 +76,7 @@ public function get($name)
             $alternatives = array();
             foreach ($this->parameters as $key => $parameterValue) {
                 $lev = levenshtein($name, $key);
-                if ($lev <= strlen($name) / 3 || false !== strpos($key, $name)) {
+                if ($lev <= \strlen($name) / 3 || false !== strpos($key, $name)) {
                     $alternatives[] = $key;
                 }
             }
@@ -155,7 +155,7 @@ public function resolve()
      */
     public function resolveValue($value, array $resolving = array())
     {
-        if (is_array($value)) {
+        if (\is_array($value)) {
             $args = array();
             foreach ($value as $k => $v) {
                 $args[$this->resolveValue($k, $resolving)] = $this->resolveValue($v, $resolving);
@@ -164,7 +164,7 @@ public function resolveValue($value, array $resolving = array())
             return $args;
         }
 
-        if (!is_string($value)) {
+        if (!\is_string($value)) {
             return $value;
         }
 
@@ -215,8 +215,8 @@ public function resolveString($value, array $resolving = array())
 
             $resolved = $self->get($key);
 
-            if (!is_string($resolved) && !is_numeric($resolved)) {
-                throw new RuntimeException(sprintf('A string value must be composed of strings and/or numbers, but found parameter "%s" of type %s inside string value "%s".', $key, gettype($resolved), $value));
+            if (!\is_string($resolved) && !is_numeric($resolved)) {
+                throw new RuntimeException(sprintf('A string value must be composed of strings and/or numbers, but found parameter "%s" of type %s inside string value "%s".', $key, \gettype($resolved), $value));
             }
 
             $resolved = (string) $resolved;
@@ -236,11 +236,11 @@ public function isResolved()
      */
     public function escapeValue($value)
     {
-        if (is_string($value)) {
+        if (\is_string($value)) {
             return str_replace('%', '%%', $value);
         }
 
-        if (is_array($value)) {
+        if (\is_array($value)) {
             $result = array();
             foreach ($value as $k => $v) {
                 $result[$k] = $this->escapeValue($v);
@@ -257,11 +257,11 @@ public function escapeValue($value)
      */
     public function unescapeValue($value)
     {
-        if (is_string($value)) {
+        if (\is_string($value)) {
             return str_replace('%%', '%', $value);
         }
 
-        if (is_array($value)) {
+        if (\is_array($value)) {
             $result = array();
             foreach ($value as $k => $v) {
                 $result[$k] = $this->unescapeValue($v);
diff --git a/src/Symfony/Component/DependencyInjection/SimpleXMLElement.php b/src/Symfony/Component/DependencyInjection/SimpleXMLElement.php
index 8f300e09e5a2..bb985ace4f48 100644
--- a/src/Symfony/Component/DependencyInjection/SimpleXMLElement.php
+++ b/src/Symfony/Component/DependencyInjection/SimpleXMLElement.php
@@ -92,7 +92,7 @@ public function getArgumentsAsPhp($name, $lowercase = true)
                     $arguments[$key] = (string) $arg;
                     break;
                 case 'constant':
-                    $arguments[$key] = constant((string) $arg);
+                    $arguments[$key] = \constant((string) $arg);
                     break;
                 default:
                     $arguments[$key] = self::phpize($arg);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php b/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php
index 593a16feb47d..15a93a6fb361 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php
@@ -278,7 +278,7 @@ public function testAddGetCompilerPass()
         $builderCompilerPasses = $builder->getCompiler()->getPassConfig()->getPasses();
         $builder->addCompilerPass($this->getMockBuilder('Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface')->getMock());
 
-        $this->assertCount(count($builder->getCompiler()->getPassConfig()->getPasses()) - 1, $builderCompilerPasses);
+        $this->assertCount(\count($builder->getCompiler()->getPassConfig()->getPasses()) - 1, $builderCompilerPasses);
     }
 
     public function testCreateService()
@@ -301,7 +301,7 @@ public function testCreateProxyWithRealServiceInstantiator()
         $foo1 = $builder->get('foo1');
 
         $this->assertSame($foo1, $builder->get('foo1'), 'The same proxy is retrieved on multiple subsequent calls');
-        $this->assertSame('Bar\FooClass', get_class($foo1));
+        $this->assertSame('Bar\FooClass', \get_class($foo1));
     }
 
     public function testCreateServiceClass()
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
index e341a233b116..1a52ef4de425 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
@@ -77,10 +77,10 @@ public function testDumpRelativeDir()
 
         $container = new ContainerBuilder();
         $container->setDefinition('test', $definition);
-        $container->setParameter('foo', 'wiz'.dirname(__DIR__));
+        $container->setParameter('foo', 'wiz'.\dirname(__DIR__));
         $container->setParameter('bar', __DIR__);
         $container->setParameter('baz', '%bar%/PhpDumperTest.php');
-        $container->setParameter('buz', dirname(dirname(__DIR__)));
+        $container->setParameter('buz', \dirname(\dirname(__DIR__)));
         $container->compile();
 
         $dumper = new PhpDumper($container);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
index 16bdeef17e28..5fce085422c1 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
@@ -435,10 +435,10 @@ public function testExtensions()
 
     public function testExtensionInPhar()
     {
-        if (extension_loaded('suhosin') && false === strpos(ini_get('suhosin.executor.include.whitelist'), 'phar')) {
+        if (\extension_loaded('suhosin') && false === strpos(ini_get('suhosin.executor.include.whitelist'), 'phar')) {
             $this->markTestSkipped('To run this test, add "phar" to the "suhosin.executor.include.whitelist" settings in your php.ini file.');
         }
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             $this->markTestSkipped('HHVM makes this test conflict with those run in separate processes.');
         }
 
diff --git a/src/Symfony/Component/DomCrawler/Crawler.php b/src/Symfony/Component/DomCrawler/Crawler.php
index 76c7eca0fc7b..565a22431228 100644
--- a/src/Symfony/Component/DomCrawler/Crawler.php
+++ b/src/Symfony/Component/DomCrawler/Crawler.php
@@ -87,12 +87,12 @@ public function add($node)
             $this->addNodeList($node);
         } elseif ($node instanceof \DOMNode) {
             $this->addNode($node);
-        } elseif (is_array($node)) {
+        } elseif (\is_array($node)) {
             $this->addNodes($node);
-        } elseif (is_string($node)) {
+        } elseif (\is_string($node)) {
             $this->addContent($node);
         } elseif (null !== $node) {
-            throw new \InvalidArgumentException(sprintf('Expecting a DOMNodeList or DOMNode instance, an array, a string, or null, but got "%s".', is_object($node) ? get_class($node) : gettype($node)));
+            throw new \InvalidArgumentException(sprintf('Expecting a DOMNodeList or DOMNode instance, an array, a string, or null, but got "%s".', \is_object($node) ? \get_class($node) : \gettype($node)));
         }
     }
 
@@ -186,7 +186,7 @@ public function addHtmlContent($content, $charset = 'UTF-8')
         $base = $this->filterRelativeXPath('descendant-or-self::base')->extract(array('href'));
 
         $baseHref = current($base);
-        if (count($base) && !empty($baseHref)) {
+        if (\count($base) && !empty($baseHref)) {
             if ($this->baseHref) {
                 $linkNode = $dom->createElement('a');
                 $linkNode->setAttribute('href', $baseHref);
@@ -405,7 +405,7 @@ public function first()
      */
     public function last()
     {
-        return $this->eq(count($this) - 1);
+        return $this->eq(\count($this) - 1);
     }
 
     /**
@@ -417,7 +417,7 @@ public function last()
      */
     public function siblings()
     {
-        if (!count($this)) {
+        if (!\count($this)) {
             throw new \InvalidArgumentException('The current node list is empty.');
         }
 
@@ -433,7 +433,7 @@ public function siblings()
      */
     public function nextAll()
     {
-        if (!count($this)) {
+        if (!\count($this)) {
             throw new \InvalidArgumentException('The current node list is empty.');
         }
 
@@ -449,7 +449,7 @@ public function nextAll()
      */
     public function previousAll()
     {
-        if (!count($this)) {
+        if (!\count($this)) {
             throw new \InvalidArgumentException('The current node list is empty.');
         }
 
@@ -465,7 +465,7 @@ public function previousAll()
      */
     public function parents()
     {
-        if (!count($this)) {
+        if (!\count($this)) {
             throw new \InvalidArgumentException('The current node list is empty.');
         }
 
@@ -490,7 +490,7 @@ public function parents()
      */
     public function children()
     {
-        if (!count($this)) {
+        if (!\count($this)) {
             throw new \InvalidArgumentException('The current node list is empty.');
         }
 
@@ -510,7 +510,7 @@ public function children()
      */
     public function attr($attribute)
     {
-        if (!count($this)) {
+        if (!\count($this)) {
             throw new \InvalidArgumentException('The current node list is empty.');
         }
 
@@ -528,7 +528,7 @@ public function attr($attribute)
      */
     public function nodeName()
     {
-        if (!count($this)) {
+        if (!\count($this)) {
             throw new \InvalidArgumentException('The current node list is empty.');
         }
 
@@ -544,7 +544,7 @@ public function nodeName()
      */
     public function text()
     {
-        if (!count($this)) {
+        if (!\count($this)) {
             throw new \InvalidArgumentException('The current node list is empty.');
         }
 
@@ -560,7 +560,7 @@ public function text()
      */
     public function html()
     {
-        if (!count($this)) {
+        if (!\count($this)) {
             throw new \InvalidArgumentException('The current node list is empty.');
         }
 
@@ -588,7 +588,7 @@ public function html()
     public function extract($attributes)
     {
         $attributes = (array) $attributes;
-        $count = count($attributes);
+        $count = \count($attributes);
 
         $data = array();
         foreach ($this as $node) {
@@ -697,14 +697,14 @@ public function selectButton($value)
      */
     public function link($method = 'get')
     {
-        if (!count($this)) {
+        if (!\count($this)) {
             throw new \InvalidArgumentException('The current node list is empty.');
         }
 
         $node = $this->getNode(0);
 
         if (!$node instanceof \DOMElement) {
-            throw new \InvalidArgumentException(sprintf('The selected node should be instance of DOMElement, got "%s".', get_class($node)));
+            throw new \InvalidArgumentException(sprintf('The selected node should be instance of DOMElement, got "%s".', \get_class($node)));
         }
 
         return new Link($node, $this->baseHref, $method);
@@ -722,7 +722,7 @@ public function links()
         $links = array();
         foreach ($this as $node) {
             if (!$node instanceof \DOMElement) {
-                throw new \InvalidArgumentException(sprintf('The current node list should contain only DOMElement instances, "%s" found.', get_class($node)));
+                throw new \InvalidArgumentException(sprintf('The current node list should contain only DOMElement instances, "%s" found.', \get_class($node)));
             }
 
             $links[] = new Link($node, $this->baseHref, 'get');
@@ -743,14 +743,14 @@ public function links()
      */
     public function form(array $values = null, $method = null)
     {
-        if (!count($this)) {
+        if (!\count($this)) {
             throw new \InvalidArgumentException('The current node list is empty.');
         }
 
         $node = $this->getNode(0);
 
         if (!$node instanceof \DOMElement) {
-            throw new \InvalidArgumentException(sprintf('The selected node should be instance of DOMElement, got "%s".', get_class($node)));
+            throw new \InvalidArgumentException(sprintf('The selected node should be instance of DOMElement, got "%s".', \get_class($node)));
         }
 
         $form = new Form($node, $this->uri, $method, $this->baseHref);
@@ -989,7 +989,7 @@ private function relativize($xpath)
         // We cannot simply drop
         $nonMatchingExpression = 'a[name() = "b"]';
 
-        $xpathLen = strlen($xpath);
+        $xpathLen = \strlen($xpath);
         $openedBrackets = 0;
         $startPosition = strspn($xpath, " \t\n\r\0\x0B");
 
@@ -1185,7 +1185,7 @@ private function createSubCrawler($nodes)
 
     private function triggerDeprecation($methodName, $useTrace = false)
     {
-        if ($useTrace || defined('HHVM_VERSION')) {
+        if ($useTrace || \defined('HHVM_VERSION')) {
             if (\PHP_VERSION_ID >= 50400) {
                 $trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 3);
             } else {
diff --git a/src/Symfony/Component/DomCrawler/Field/ChoiceFormField.php b/src/Symfony/Component/DomCrawler/Field/ChoiceFormField.php
index 8562181a2915..6f112b535007 100644
--- a/src/Symfony/Component/DomCrawler/Field/ChoiceFormField.php
+++ b/src/Symfony/Component/DomCrawler/Field/ChoiceFormField.php
@@ -45,7 +45,7 @@ class ChoiceFormField extends FormField
     public function hasValue()
     {
         // don't send a value for unchecked checkboxes
-        if (in_array($this->type, array('checkbox', 'radio')) && null === $this->value) {
+        if (\in_array($this->type, array('checkbox', 'radio')) && null === $this->value) {
             return false;
         }
 
@@ -126,7 +126,7 @@ public function setValue($value)
             // check
             $this->value = $this->options[0]['value'];
         } else {
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 if (!$this->multiple) {
                     throw new \InvalidArgumentException(sprintf('The value for "%s" cannot be an array.', $this->name));
                 }
@@ -144,7 +144,7 @@ public function setValue($value)
                 $value = (array) $value;
             }
 
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 $this->value = $value;
             } else {
                 parent::setValue($value);
diff --git a/src/Symfony/Component/DomCrawler/Field/FileFormField.php b/src/Symfony/Component/DomCrawler/Field/FileFormField.php
index 0e0f94347a5e..7f973ccabfb5 100644
--- a/src/Symfony/Component/DomCrawler/Field/FileFormField.php
+++ b/src/Symfony/Component/DomCrawler/Field/FileFormField.php
@@ -28,7 +28,7 @@ class FileFormField extends FormField
     public function setErrorCode($error)
     {
         $codes = array(UPLOAD_ERR_INI_SIZE, UPLOAD_ERR_FORM_SIZE, UPLOAD_ERR_PARTIAL, UPLOAD_ERR_NO_FILE, UPLOAD_ERR_NO_TMP_DIR, UPLOAD_ERR_CANT_WRITE, UPLOAD_ERR_EXTENSION);
-        if (!in_array($error, $codes)) {
+        if (!\in_array($error, $codes)) {
             throw new \InvalidArgumentException(sprintf('The error code %s is not valid.', $error));
         }
 
diff --git a/src/Symfony/Component/DomCrawler/Form.php b/src/Symfony/Component/DomCrawler/Form.php
index 258be960a707..fc0927f8ac8f 100644
--- a/src/Symfony/Component/DomCrawler/Form.php
+++ b/src/Symfony/Component/DomCrawler/Form.php
@@ -108,7 +108,7 @@ public function getValues()
      */
     public function getFiles()
     {
-        if (!in_array($this->getMethod(), array('POST', 'PUT', 'DELETE', 'PATCH'))) {
+        if (!\in_array($this->getMethod(), array('POST', 'PUT', 'DELETE', 'PATCH'))) {
             return array();
         }
 
@@ -142,7 +142,7 @@ public function getPhpValues()
             $qs = http_build_query(array($name => $value), '', '&');
             if (!empty($qs)) {
                 parse_str($qs, $expandedValue);
-                $varName = substr($name, 0, strlen(key($expandedValue)));
+                $varName = substr($name, 0, \strlen(key($expandedValue)));
                 $values = array_replace_recursive($values, array($varName => current($expandedValue)));
             }
         }
@@ -169,7 +169,7 @@ public function getPhpFiles()
             $qs = http_build_query(array($name => $value), '', '&');
             if (!empty($qs)) {
                 parse_str($qs, $expandedValue);
-                $varName = substr($name, 0, strlen(key($expandedValue)));
+                $varName = substr($name, 0, \strlen(key($expandedValue)));
 
                 array_walk_recursive(
                     $expandedValue,
@@ -202,7 +202,7 @@ public function getUri()
     {
         $uri = parent::getUri();
 
-        if (!in_array($this->getMethod(), array('POST', 'PUT', 'DELETE', 'PATCH'))) {
+        if (!\in_array($this->getMethod(), array('POST', 'PUT', 'DELETE', 'PATCH'))) {
             $query = parse_url($uri, PHP_URL_QUERY);
             $currentParameters = array();
             if ($query) {
@@ -369,7 +369,7 @@ public function disableValidation()
     protected function setNode(\DOMElement $node)
     {
         $this->button = $node;
-        if ('button' === $node->nodeName || ('input' === $node->nodeName && in_array(strtolower($node->getAttribute('type')), array('submit', 'button', 'image')))) {
+        if ('button' === $node->nodeName || ('input' === $node->nodeName && \in_array(strtolower($node->getAttribute('type')), array('submit', 'button', 'image')))) {
             if ($node->hasAttribute('form')) {
                 // if the node has the HTML5-compliant 'form' attribute, use it
                 $formId = $node->getAttribute('form');
@@ -470,7 +470,7 @@ private function addField(\DOMElement $node)
             }
         } elseif ('input' == $nodeName && 'file' == strtolower($node->getAttribute('type'))) {
             $this->set(new Field\FileFormField($node));
-        } elseif ('input' == $nodeName && !in_array(strtolower($node->getAttribute('type')), array('submit', 'button', 'image'))) {
+        } elseif ('input' == $nodeName && !\in_array(strtolower($node->getAttribute('type')), array('submit', 'button', 'image'))) {
             $this->set(new Field\InputFormField($node));
         } elseif ('textarea' == $nodeName) {
             $this->set(new Field\TextareaFormField($node));
diff --git a/src/Symfony/Component/DomCrawler/FormFieldRegistry.php b/src/Symfony/Component/DomCrawler/FormFieldRegistry.php
index 6ad6d933e406..d2acb15adac0 100644
--- a/src/Symfony/Component/DomCrawler/FormFieldRegistry.php
+++ b/src/Symfony/Component/DomCrawler/FormFieldRegistry.php
@@ -33,7 +33,7 @@ public function add(FormField $field)
 
         $target = &$this->fields;
         while ($segments) {
-            if (!is_array($target)) {
+            if (!\is_array($target)) {
                 $target = array();
             }
             $path = array_shift($segments);
@@ -55,7 +55,7 @@ public function remove($name)
     {
         $segments = $this->getSegments($name);
         $target = &$this->fields;
-        while (count($segments) > 1) {
+        while (\count($segments) > 1) {
             $path = array_shift($segments);
             if (!array_key_exists($path, $target)) {
                 return;
@@ -118,9 +118,9 @@ public function has($name)
     public function set($name, $value)
     {
         $target = &$this->get($name);
-        if ((!is_array($value) && $target instanceof Field\FormField) || $target instanceof Field\ChoiceFormField) {
+        if ((!\is_array($value) && $target instanceof Field\FormField) || $target instanceof Field\ChoiceFormField) {
             $target->setValue($value);
-        } elseif (is_array($value)) {
+        } elseif (\is_array($value)) {
             $fields = self::create($name, $value);
             foreach ($fields->all() as $k => $v) {
                 $this->set($k, $v);
@@ -173,7 +173,7 @@ private function walk(array $array, $base = '', array &$output = array())
     {
         foreach ($array as $k => $v) {
             $path = empty($base) ? $k : sprintf('%s[%s]', $base, $k);
-            if (is_array($v)) {
+            if (\is_array($v)) {
                 $this->walk($v, $path, $output);
             } else {
                 $output[$path] = $v;
diff --git a/src/Symfony/Component/DomCrawler/Link.php b/src/Symfony/Component/DomCrawler/Link.php
index b68f246b0efd..0521a41a4e4f 100644
--- a/src/Symfony/Component/DomCrawler/Link.php
+++ b/src/Symfony/Component/DomCrawler/Link.php
@@ -42,7 +42,7 @@ class Link
      */
     public function __construct(\DOMElement $node, $currentUri, $method = 'GET')
     {
-        if (!in_array(strtolower(substr($currentUri, 0, 4)), array('http', 'file'))) {
+        if (!\in_array(strtolower(substr($currentUri, 0, 4)), array('http', 'file'))) {
             throw new \InvalidArgumentException(sprintf('Current URI must be an absolute URL ("%s").', $currentUri));
         }
 
@@ -114,7 +114,7 @@ public function getUri()
         }
 
         // relative path
-        $path = parse_url(substr($this->currentUri, strlen($baseUri)), PHP_URL_PATH);
+        $path = parse_url(substr($this->currentUri, \strlen($baseUri)), PHP_URL_PATH);
         $path = $this->canonicalizePath(substr($path, 0, strrpos($path, '/')).'/'.$uri);
 
         return $baseUri.('' === $path || '/' !== $path[0] ? '/' : '').$path;
diff --git a/src/Symfony/Component/DomCrawler/Tests/FormTest.php b/src/Symfony/Component/DomCrawler/Tests/FormTest.php
index 258a997a285f..6303323223f9 100644
--- a/src/Symfony/Component/DomCrawler/Tests/FormTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/FormTest.php
@@ -191,7 +191,7 @@ public function testConstructor($message, $form, $values)
             $values,
             array_map(
                 function ($field) {
-                    $class = get_class($field);
+                    $class = \get_class($field);
 
                     return array(substr($class, strrpos($class, '\\') + 1), $field->getValue());
                 },
diff --git a/src/Symfony/Component/EventDispatcher/ContainerAwareEventDispatcher.php b/src/Symfony/Component/EventDispatcher/ContainerAwareEventDispatcher.php
index 243ce5ce509a..4dcede7e7381 100644
--- a/src/Symfony/Component/EventDispatcher/ContainerAwareEventDispatcher.php
+++ b/src/Symfony/Component/EventDispatcher/ContainerAwareEventDispatcher.php
@@ -54,7 +54,7 @@ public function __construct(ContainerInterface $container)
      */
     public function addListenerService($eventName, $callback, $priority = 0)
     {
-        if (!is_array($callback) || 2 !== count($callback)) {
+        if (!\is_array($callback) || 2 !== \count($callback)) {
             throw new \InvalidArgumentException('Expected an array("service", "method") argument');
         }
 
@@ -136,9 +136,9 @@ public function getListenerPriority($eventName, $listener)
     public function addSubscriberService($serviceId, $class)
     {
         foreach ($class::getSubscribedEvents() as $eventName => $params) {
-            if (is_string($params)) {
+            if (\is_string($params)) {
                 $this->listenerIds[$eventName][] = array($serviceId, $params, 0);
-            } elseif (is_string($params[0])) {
+            } elseif (\is_string($params[0])) {
                 $this->listenerIds[$eventName][] = array($serviceId, $params[0], isset($params[1]) ? $params[1] : 0);
             } else {
                 foreach ($params as $listener) {
diff --git a/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php b/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php
index db76bb845021..174d8aaf201a 100644
--- a/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php
+++ b/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php
@@ -210,7 +210,7 @@ public function getNotCalledListeners()
      */
     public function __call($method, $arguments)
     {
-        return call_user_func_array(array($this->dispatcher, $method), $arguments);
+        return \call_user_func_array(array($this->dispatcher, $method), $arguments);
     }
 
     /**
@@ -310,7 +310,7 @@ private function getListenerInfo($listener, $eventName)
                 'type' => 'Closure',
                 'pretty' => 'closure',
             );
-        } elseif (is_string($listener)) {
+        } elseif (\is_string($listener)) {
             try {
                 $r = new \ReflectionFunction($listener);
                 $file = $r->getFileName();
@@ -326,11 +326,11 @@ private function getListenerInfo($listener, $eventName)
                 'line' => $line,
                 'pretty' => $listener,
             );
-        } elseif (is_array($listener) || (is_object($listener) && is_callable($listener))) {
-            if (!is_array($listener)) {
+        } elseif (\is_array($listener) || (\is_object($listener) && \is_callable($listener))) {
+            if (!\is_array($listener)) {
                 $listener = array($listener, '__invoke');
             }
-            $class = is_object($listener[0]) ? get_class($listener[0]) : $listener[0];
+            $class = \is_object($listener[0]) ? \get_class($listener[0]) : $listener[0];
             try {
                 $r = new \ReflectionMethod($class, $listener[1]);
                 $file = $r->getFileName();
@@ -354,11 +354,11 @@ private function getListenerInfo($listener, $eventName)
 
     private function sortListenersByPriority($a, $b)
     {
-        if (is_int($a['priority']) && !is_int($b['priority'])) {
+        if (\is_int($a['priority']) && !\is_int($b['priority'])) {
             return 1;
         }
 
-        if (!is_int($a['priority']) && is_int($b['priority'])) {
+        if (!\is_int($a['priority']) && \is_int($b['priority'])) {
             return -1;
         }
 
diff --git a/src/Symfony/Component/EventDispatcher/Debug/WrappedListener.php b/src/Symfony/Component/EventDispatcher/Debug/WrappedListener.php
index e16627d6ad91..699424543396 100644
--- a/src/Symfony/Component/EventDispatcher/Debug/WrappedListener.php
+++ b/src/Symfony/Component/EventDispatcher/Debug/WrappedListener.php
@@ -58,7 +58,7 @@ public function __invoke(Event $event, $eventName, EventDispatcherInterface $dis
 
         $e = $this->stopwatch->start($this->name, 'event_listener');
 
-        call_user_func($this->listener, $event, $eventName, $this->dispatcher ?: $dispatcher);
+        \call_user_func($this->listener, $event, $eventName, $this->dispatcher ?: $dispatcher);
 
         if ($e->isStarted()) {
             $e->stop();
diff --git a/src/Symfony/Component/EventDispatcher/EventDispatcher.php b/src/Symfony/Component/EventDispatcher/EventDispatcher.php
index dec7c85a14d0..b41b98e554e0 100644
--- a/src/Symfony/Component/EventDispatcher/EventDispatcher.php
+++ b/src/Symfony/Component/EventDispatcher/EventDispatcher.php
@@ -92,7 +92,7 @@ public function getListenerPriority($eventName, $listener)
         }
 
         foreach ($this->listeners[$eventName] as $priority => $listeners) {
-            if (false !== in_array($listener, $listeners, true)) {
+            if (false !== \in_array($listener, $listeners, true)) {
                 return $priority;
             }
         }
@@ -137,9 +137,9 @@ public function removeListener($eventName, $listener)
     public function addSubscriber(EventSubscriberInterface $subscriber)
     {
         foreach ($subscriber->getSubscribedEvents() as $eventName => $params) {
-            if (is_string($params)) {
+            if (\is_string($params)) {
                 $this->addListener($eventName, array($subscriber, $params));
-            } elseif (is_string($params[0])) {
+            } elseif (\is_string($params[0])) {
                 $this->addListener($eventName, array($subscriber, $params[0]), isset($params[1]) ? $params[1] : 0);
             } else {
                 foreach ($params as $listener) {
@@ -155,12 +155,12 @@ public function addSubscriber(EventSubscriberInterface $subscriber)
     public function removeSubscriber(EventSubscriberInterface $subscriber)
     {
         foreach ($subscriber->getSubscribedEvents() as $eventName => $params) {
-            if (is_array($params) && is_array($params[0])) {
+            if (\is_array($params) && \is_array($params[0])) {
                 foreach ($params as $listener) {
                     $this->removeListener($eventName, array($subscriber, $listener[0]));
                 }
             } else {
-                $this->removeListener($eventName, array($subscriber, is_string($params) ? $params : $params[0]));
+                $this->removeListener($eventName, array($subscriber, \is_string($params) ? $params : $params[0]));
             }
         }
     }
@@ -181,7 +181,7 @@ protected function doDispatch($listeners, $eventName, Event $event)
             if ($event->isPropagationStopped()) {
                 break;
             }
-            call_user_func($listener, $event, $eventName, $this);
+            \call_user_func($listener, $event, $eventName, $this);
         }
     }
 
@@ -193,6 +193,6 @@ protected function doDispatch($listeners, $eventName, Event $event)
     private function sortListeners($eventName)
     {
         krsort($this->listeners[$eventName]);
-        $this->sorted[$eventName] = call_user_func_array('array_merge', $this->listeners[$eventName]);
+        $this->sorted[$eventName] = \call_user_func_array('array_merge', $this->listeners[$eventName]);
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Compiler.php b/src/Symfony/Component/ExpressionLanguage/Compiler.php
index 66d106041fde..acfb6184a499 100644
--- a/src/Symfony/Component/ExpressionLanguage/Compiler.php
+++ b/src/Symfony/Component/ExpressionLanguage/Compiler.php
@@ -110,7 +110,7 @@ public function string($value)
      */
     public function repr($value)
     {
-        if (is_int($value) || is_float($value)) {
+        if (\is_int($value) || \is_float($value)) {
             if (false !== $locale = setlocale(LC_NUMERIC, 0)) {
                 setlocale(LC_NUMERIC, 'C');
             }
@@ -122,9 +122,9 @@ public function repr($value)
             }
         } elseif (null === $value) {
             $this->raw('null');
-        } elseif (is_bool($value)) {
+        } elseif (\is_bool($value)) {
             $this->raw($value ? 'true' : 'false');
-        } elseif (is_array($value)) {
+        } elseif (\is_array($value)) {
             $this->raw('array(');
             $first = true;
             foreach ($value as $key => $value) {
diff --git a/src/Symfony/Component/ExpressionLanguage/ExpressionLanguage.php b/src/Symfony/Component/ExpressionLanguage/ExpressionLanguage.php
index a9941f1aab33..e2b93b97eeaa 100644
--- a/src/Symfony/Component/ExpressionLanguage/ExpressionLanguage.php
+++ b/src/Symfony/Component/ExpressionLanguage/ExpressionLanguage.php
@@ -85,7 +85,7 @@ public function parse($expression, $names)
         $cacheKeyItems = array();
 
         foreach ($names as $nameKey => $name) {
-            $cacheKeyItems[] = is_int($nameKey) ? $name : $nameKey.':'.$name;
+            $cacheKeyItems[] = \is_int($nameKey) ? $name : $nameKey.':'.$name;
         }
 
         $key = $expression.'//'.implode('|', $cacheKeyItems);
@@ -137,7 +137,7 @@ protected function registerFunctions()
         $this->register('constant', function ($constant) {
             return sprintf('constant(%s)', $constant);
         }, function (array $values, $constant) {
-            return constant($constant);
+            return \constant($constant);
         });
     }
 
diff --git a/src/Symfony/Component/ExpressionLanguage/Lexer.php b/src/Symfony/Component/ExpressionLanguage/Lexer.php
index aeeda8a856c9..bd54e8913a7f 100644
--- a/src/Symfony/Component/ExpressionLanguage/Lexer.php
+++ b/src/Symfony/Component/ExpressionLanguage/Lexer.php
@@ -33,7 +33,7 @@ public function tokenize($expression)
         $cursor = 0;
         $tokens = array();
         $brackets = array();
-        $end = strlen($expression);
+        $end = \strlen($expression);
 
         while ($cursor < $end) {
             if (' ' == $expression[$cursor]) {
@@ -49,7 +49,7 @@ public function tokenize($expression)
                     $number = (int) $match[0]; // integers lower than the maximum
                 }
                 $tokens[] = new Token(Token::NUMBER_TYPE, $number, $cursor + 1);
-                $cursor += strlen($match[0]);
+                $cursor += \strlen($match[0]);
             } elseif (false !== strpos('([{', $expression[$cursor])) {
                 // opening bracket
                 $brackets[] = array($expression[$cursor], $cursor);
@@ -72,11 +72,11 @@ public function tokenize($expression)
             } elseif (preg_match('/"([^"\\\\]*(?:\\\\.[^"\\\\]*)*)"|\'([^\'\\\\]*(?:\\\\.[^\'\\\\]*)*)\'/As', $expression, $match, 0, $cursor)) {
                 // strings
                 $tokens[] = new Token(Token::STRING_TYPE, stripcslashes(substr($match[0], 1, -1)), $cursor + 1);
-                $cursor += strlen($match[0]);
+                $cursor += \strlen($match[0]);
             } elseif (preg_match('/not in(?=[\s(])|\!\=\=|not(?=[\s(])|and(?=[\s(])|\=\=\=|\>\=|or(?=[\s(])|\<\=|\*\*|\.\.|in(?=[\s(])|&&|\|\||matches|\=\=|\!\=|\*|~|%|\/|\>|\||\!|\^|&|\+|\<|\-/A', $expression, $match, 0, $cursor)) {
                 // operators
                 $tokens[] = new Token(Token::OPERATOR_TYPE, $match[0], $cursor + 1);
-                $cursor += strlen($match[0]);
+                $cursor += \strlen($match[0]);
             } elseif (false !== strpos('.,?:', $expression[$cursor])) {
                 // punctuation
                 $tokens[] = new Token(Token::PUNCTUATION_TYPE, $expression[$cursor], $cursor + 1);
@@ -84,7 +84,7 @@ public function tokenize($expression)
             } elseif (preg_match('/[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*/A', $expression, $match, 0, $cursor)) {
                 // names
                 $tokens[] = new Token(Token::NAME_TYPE, $match[0], $cursor + 1);
-                $cursor += strlen($match[0]);
+                $cursor += \strlen($match[0]);
             } else {
                 // unlexable
                 throw new SyntaxError(sprintf('Unexpected character "%s"', $expression[$cursor]), $cursor, $expression);
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php b/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php
index 8cf1bc2e43df..2067d700c6e3 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php
@@ -93,7 +93,7 @@ public function evaluate($functions, $values)
             $right = $this->nodes['right']->evaluate($functions, $values);
 
             if ('not in' === $operator) {
-                return !in_array($left, $right);
+                return !\in_array($left, $right);
             }
             $f = self::$functions[$operator];
 
@@ -135,9 +135,9 @@ public function evaluate($functions, $values)
             case '<=':
                 return $left <= $right;
             case 'not in':
-                return !in_array($left, $right);
+                return !\in_array($left, $right);
             case 'in':
-                return in_array($left, $right);
+                return \in_array($left, $right);
             case '+':
                 return $left + $right;
             case '-':
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/FunctionNode.php b/src/Symfony/Component/ExpressionLanguage/Node/FunctionNode.php
index ab23acb94c73..41efdf0e1885 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/FunctionNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/FunctionNode.php
@@ -37,7 +37,7 @@ public function compile(Compiler $compiler)
 
         $function = $compiler->getFunction($this->attributes['name']);
 
-        $compiler->raw(call_user_func_array($function['compiler'], $arguments));
+        $compiler->raw(\call_user_func_array($function['compiler'], $arguments));
     }
 
     public function evaluate($functions, $values)
@@ -47,6 +47,6 @@ public function evaluate($functions, $values)
             $arguments[] = $node->evaluate($functions, $values);
         }
 
-        return call_user_func_array($functions[$this->attributes['name']]['evaluator'], $arguments);
+        return \call_user_func_array($functions[$this->attributes['name']]['evaluator'], $arguments);
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/GetAttrNode.php b/src/Symfony/Component/ExpressionLanguage/Node/GetAttrNode.php
index ec5987645b33..be9f23412c04 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/GetAttrNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/GetAttrNode.php
@@ -69,7 +69,7 @@ public function evaluate($functions, $values)
         switch ($this->attributes['type']) {
             case self::PROPERTY_CALL:
                 $obj = $this->nodes['node']->evaluate($functions, $values);
-                if (!is_object($obj)) {
+                if (!\is_object($obj)) {
                     throw new \RuntimeException('Unable to get a property on a non-object.');
                 }
 
@@ -79,18 +79,18 @@ public function evaluate($functions, $values)
 
             case self::METHOD_CALL:
                 $obj = $this->nodes['node']->evaluate($functions, $values);
-                if (!is_object($obj)) {
+                if (!\is_object($obj)) {
                     throw new \RuntimeException('Unable to get a property on a non-object.');
                 }
-                if (!is_callable($toCall = array($obj, $this->nodes['attribute']->attributes['value']))) {
-                    throw new \RuntimeException(sprintf('Unable to call method "%s" of object "%s".', $this->nodes['attribute']->attributes['value'], get_class($obj)));
+                if (!\is_callable($toCall = array($obj, $this->nodes['attribute']->attributes['value']))) {
+                    throw new \RuntimeException(sprintf('Unable to call method "%s" of object "%s".', $this->nodes['attribute']->attributes['value'], \get_class($obj)));
                 }
 
-                return call_user_func_array($toCall, $this->nodes['arguments']->evaluate($functions, $values));
+                return \call_user_func_array($toCall, $this->nodes['arguments']->evaluate($functions, $values));
 
             case self::ARRAY_CALL:
                 $array = $this->nodes['node']->evaluate($functions, $values);
-                if (!is_array($array) && !$array instanceof \ArrayAccess) {
+                if (!\is_array($array) && !$array instanceof \ArrayAccess) {
                     throw new \RuntimeException('Unable to get an item on a non-array.');
                 }
 
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/Node.php b/src/Symfony/Component/ExpressionLanguage/Node/Node.php
index b5fb2fe7df97..f50487c5923b 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/Node.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/Node.php
@@ -40,9 +40,9 @@ public function __toString()
             $attributes[] = sprintf('%s: %s', $name, str_replace("\n", '', var_export($value, true)));
         }
 
-        $repr = array(str_replace('Symfony\Component\ExpressionLanguage\Node\\', '', get_class($this)).'('.implode(', ', $attributes));
+        $repr = array(str_replace('Symfony\Component\ExpressionLanguage\Node\\', '', \get_class($this)).'('.implode(', ', $attributes));
 
-        if (count($this->nodes)) {
+        if (\count($this->nodes)) {
             foreach ($this->nodes as $node) {
                 foreach (explode("\n", (string) $node) as $line) {
                     $repr[] = '    '.$line;
diff --git a/src/Symfony/Component/ExpressionLanguage/Parser.php b/src/Symfony/Component/ExpressionLanguage/Parser.php
index 68d48a9af8f8..bebfc5b63d33 100644
--- a/src/Symfony/Component/ExpressionLanguage/Parser.php
+++ b/src/Symfony/Component/ExpressionLanguage/Parser.php
@@ -200,13 +200,13 @@ public function parsePrimaryExpression()
 
                             $node = new Node\FunctionNode($token->value, $this->parseArguments());
                         } else {
-                            if (!in_array($token->value, $this->names, true)) {
+                            if (!\in_array($token->value, $this->names, true)) {
                                 throw new SyntaxError(sprintf('Variable "%s" is not valid', $token->value), $token->cursor, $this->stream->getExpression());
                             }
 
                             // is the name used in the compiled code different
                             // from the name used in the expression?
-                            if (is_int($name = array_search($token->value, $this->names))) {
+                            if (\is_int($name = array_search($token->value, $this->names))) {
                                 $name = $token->value;
                             }
 
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/LexerTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/LexerTest.php
index 87c16f707b92..16bf4508628b 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/LexerTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/LexerTest.php
@@ -33,7 +33,7 @@ protected function setUp()
      */
     public function testTokenize($tokens, $expression)
     {
-        $tokens[] = new Token('end of expression', null, strlen($expression) + 1);
+        $tokens[] = new Token('end of expression', null, \strlen($expression) + 1);
         $this->assertEquals(new TokenStream($tokens, $expression), $this->lexer->tokenize($expression));
     }
 
diff --git a/src/Symfony/Component/Filesystem/Filesystem.php b/src/Symfony/Component/Filesystem/Filesystem.php
index 1355f5cfea5a..7609ca34c38b 100644
--- a/src/Symfony/Component/Filesystem/Filesystem.php
+++ b/src/Symfony/Component/Filesystem/Filesystem.php
@@ -44,7 +44,7 @@ public function copy($originFile, $targetFile, $overwriteNewerFiles = false)
             throw new FileNotFoundException(sprintf('Failed to copy "%s" because file does not exist.', $originFile), 0, null, $originFile);
         }
 
-        $this->mkdir(dirname($targetFile));
+        $this->mkdir(\dirname($targetFile));
 
         $doCopy = true;
         if (!$overwriteNewerFiles && null === parse_url($originFile, PHP_URL_HOST) && is_file($targetFile)) {
@@ -121,7 +121,7 @@ public function exists($files)
         $maxPathLength = PHP_MAXPATHLEN - 2;
 
         foreach ($this->toIterator($files) as $file) {
-            if (strlen($file) > $maxPathLength) {
+            if (\strlen($file) > $maxPathLength) {
                 throw new IOException(sprintf('Could not check if file exist because path length exceeds %d characters.', $maxPathLength), 0, null, $file);
             }
 
@@ -163,7 +163,7 @@ public function remove($files)
     {
         if ($files instanceof \Traversable) {
             $files = iterator_to_array($files, false);
-        } elseif (!is_array($files)) {
+        } elseif (!\is_array($files)) {
             $files = array($files);
         }
         $files = array_reverse($files);
@@ -222,7 +222,7 @@ public function chown($files, $user, $recursive = false)
             if ($recursive && is_dir($file) && !is_link($file)) {
                 $this->chown(new \FilesystemIterator($file), $user, true);
             }
-            if (is_link($file) && function_exists('lchown')) {
+            if (is_link($file) && \function_exists('lchown')) {
                 if (true !== @lchown($file, $user)) {
                     throw new IOException(sprintf('Failed to chown file "%s".', $file), 0, null, $file);
                 }
@@ -249,8 +249,8 @@ public function chgrp($files, $group, $recursive = false)
             if ($recursive && is_dir($file) && !is_link($file)) {
                 $this->chgrp(new \FilesystemIterator($file), $group, true);
             }
-            if (is_link($file) && function_exists('lchgrp')) {
-                if (true !== @lchgrp($file, $group) || (defined('HHVM_VERSION') && !posix_getgrnam($group))) {
+            if (is_link($file) && \function_exists('lchgrp')) {
+                if (true !== @lchgrp($file, $group) || (\defined('HHVM_VERSION') && !posix_getgrnam($group))) {
                     throw new IOException(sprintf('Failed to chgrp file "%s".', $file), 0, null, $file);
                 }
             } else {
@@ -303,7 +303,7 @@ private function isReadable($filename)
     {
         $maxPathLength = PHP_MAXPATHLEN - 2;
 
-        if (strlen($filename) > $maxPathLength) {
+        if (\strlen($filename) > $maxPathLength) {
             throw new IOException(sprintf('Could not check if file is readable because path length exceeds %d characters.', $maxPathLength), 0, null, $filename);
         }
 
@@ -332,7 +332,7 @@ public function symlink($originDir, $targetDir, $copyOnWindows = false)
             }
         }
 
-        $this->mkdir(dirname($targetDir));
+        $this->mkdir(\dirname($targetDir));
 
         if (is_link($targetDir)) {
             if (readlink($targetDir) === $originDir) {
@@ -368,7 +368,7 @@ public function makePathRelative($endPath, $startPath)
         }
 
         $stripDriveLetter = function ($path) {
-            if (strlen($path) > 2 && ':' === $path[1] && '/' === $path[2] && ctype_alpha($path[0])) {
+            if (\strlen($path) > 2 && ':' === $path[1] && '/' === $path[2] && ctype_alpha($path[0])) {
                 return substr($path, 2);
             }
 
@@ -386,7 +386,7 @@ public function makePathRelative($endPath, $startPath)
             $result = array();
 
             foreach ($pathSegments as $segment) {
-                if ('..' === $segment && ($absolute || count($result))) {
+                if ('..' === $segment && ($absolute || \count($result))) {
                     array_pop($result);
                 } elseif ('.' !== $segment) {
                     $result[] = $segment;
@@ -406,16 +406,16 @@ public function makePathRelative($endPath, $startPath)
         }
 
         // Determine how deep the start path is relative to the common path (ie, "web/bundles" = 2 levels)
-        if (1 === count($startPathArr) && '' === $startPathArr[0]) {
+        if (1 === \count($startPathArr) && '' === $startPathArr[0]) {
             $depth = 0;
         } else {
-            $depth = count($startPathArr) - $index;
+            $depth = \count($startPathArr) - $index;
         }
 
         // Repeated "../" for each level need to reach the common path
         $traverser = str_repeat('../', $depth);
 
-        $endPathRemainder = implode('/', array_slice($endPathArr, $index));
+        $endPathRemainder = implode('/', \array_slice($endPathArr, $index));
 
         // Construct $endPath from traversing to the common path, then to the remaining $endPath
         $relativePath = $traverser.('' !== $endPathRemainder ? $endPathRemainder.'/' : '');
@@ -446,7 +446,7 @@ public function mirror($originDir, $targetDir, \Traversable $iterator = null, $o
     {
         $targetDir = rtrim($targetDir, '/\\');
         $originDir = rtrim($originDir, '/\\');
-        $originDirLen = strlen($originDir);
+        $originDirLen = \strlen($originDir);
 
         // Iterate in destination folder to remove obsolete entries
         if ($this->exists($targetDir) && isset($options['delete']) && $options['delete']) {
@@ -455,7 +455,7 @@ public function mirror($originDir, $targetDir, \Traversable $iterator = null, $o
                 $flags = \FilesystemIterator::SKIP_DOTS;
                 $deleteIterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($targetDir, $flags), \RecursiveIteratorIterator::CHILD_FIRST);
             }
-            $targetDirLen = strlen($targetDir);
+            $targetDirLen = \strlen($targetDir);
             foreach ($deleteIterator as $file) {
                 $origin = $originDir.substr($file->getPathname(), $targetDirLen);
                 if (!$this->exists($origin)) {
@@ -513,7 +513,7 @@ public function mirror($originDir, $targetDir, \Traversable $iterator = null, $o
     public function isAbsolutePath($file)
     {
         return strspn($file, '/\\', 0, 1)
-            || (strlen($file) > 3 && ctype_alpha($file[0])
+            || (\strlen($file) > 3 && ctype_alpha($file[0])
                 && ':' === substr($file, 1, 1)
                 && strspn($file, '/\\', 2, 1)
             )
@@ -585,7 +585,7 @@ public function tempnam($dir, $prefix)
      */
     public function dumpFile($filename, $content, $mode = 0666)
     {
-        $dir = dirname($filename);
+        $dir = \dirname($filename);
 
         if (!is_dir($dir)) {
             $this->mkdir($dir);
@@ -602,7 +602,7 @@ public function dumpFile($filename, $content, $mode = 0666)
         }
 
         if (null !== $mode) {
-            if (func_num_args() > 2) {
+            if (\func_num_args() > 2) {
                 @trigger_error('Support for modifying file permissions is deprecated since Symfony 2.3.12 and will be removed in 3.0.', E_USER_DEPRECATED);
             }
 
@@ -622,7 +622,7 @@ public function dumpFile($filename, $content, $mode = 0666)
     private function toIterator($files)
     {
         if (!$files instanceof \Traversable) {
-            $files = new \ArrayObject(is_array($files) ? $files : array($files));
+            $files = new \ArrayObject(\is_array($files) ? $files : array($files));
         }
 
         return $files;
@@ -639,7 +639,7 @@ private function getSchemeAndHierarchy($filename)
     {
         $components = explode('://', $filename, 2);
 
-        return 2 === count($components) ? array($components[0], $components[1]) : array(null, $components[0]);
+        return 2 === \count($components) ? array($components[0], $components[1]) : array(null, $components[0]);
     }
 
     private static function box($func)
diff --git a/src/Symfony/Component/Filesystem/Tests/FilesystemTest.php b/src/Symfony/Component/Filesystem/Tests/FilesystemTest.php
index 64f50ea845ae..13e0b67cbdbe 100644
--- a/src/Symfony/Component/Filesystem/Tests/FilesystemTest.php
+++ b/src/Symfony/Component/Filesystem/Tests/FilesystemTest.php
@@ -383,7 +383,7 @@ public function testFilesExistsFails()
         $oldPath = getcwd();
         mkdir($basePath);
         chdir($basePath);
-        $file = str_repeat('T', $maxPathLength - strlen($basePath) + 1);
+        $file = str_repeat('T', $maxPathLength - \strlen($basePath) + 1);
         $path = $basePath.$file;
         exec('TYPE NUL >>'.$file); // equivalent of touch, we can not use the php touch() here because it suffers from the same limitation
         $this->longPathNamesWindows[] = $path; // save this so we can clean up later
@@ -449,7 +449,7 @@ public function testChmodWithWrongModLeavesPreviousPermissionsUntouched()
     {
         $this->markAsSkippedIfChmodIsMissing();
 
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             $this->markTestSkipped('chmod() changes permissions even when passing invalid modes on HHVM');
         }
 
@@ -1247,7 +1247,7 @@ public function testDumpFileOverwritesAnExistingFile()
 
     public function testDumpFileWithFileScheme()
     {
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             $this->markTestSkipped('HHVM does not handle the file:// scheme correctly');
         }
 
diff --git a/src/Symfony/Component/Filesystem/Tests/FilesystemTestCase.php b/src/Symfony/Component/Filesystem/Tests/FilesystemTestCase.php
index 0a1254818da2..442254c7be10 100644
--- a/src/Symfony/Component/Filesystem/Tests/FilesystemTestCase.php
+++ b/src/Symfony/Component/Filesystem/Tests/FilesystemTestCase.php
@@ -122,7 +122,7 @@ protected function markAsSkippedIfChmodIsMissing()
 
     protected function markAsSkippedIfPosixIsMissing()
     {
-        if (!function_exists('posix_isatty')) {
+        if (!\function_exists('posix_isatty')) {
             $this->markTestSkipped('Function posix_isatty is required.');
         }
     }
diff --git a/src/Symfony/Component/Filesystem/Tests/LockHandlerTest.php b/src/Symfony/Component/Filesystem/Tests/LockHandlerTest.php
index 9ed871ea5a2a..d8540238b081 100644
--- a/src/Symfony/Component/Filesystem/Tests/LockHandlerTest.php
+++ b/src/Symfony/Component/Filesystem/Tests/LockHandlerTest.php
@@ -76,7 +76,7 @@ public function testErrorHandlingInLockIfLockPathBecomesUnwritable()
             $fs->remove($lockPath);
         }
 
-        $this->assertInstanceOf('Symfony\Component\Filesystem\Exception\IOException', $e, sprintf('Expected IOException to be thrown, got %s instead.', get_class($e)));
+        $this->assertInstanceOf('Symfony\Component\Filesystem\Exception\IOException', $e, sprintf('Expected IOException to be thrown, got %s instead.', \get_class($e)));
         $this->assertNull($wrongMessage, sprintf('Expected exception message to contain "Permission denied", got "%s" instead.', $wrongMessage));
     }
 
diff --git a/src/Symfony/Component/Finder/Adapter/AbstractFindAdapter.php b/src/Symfony/Component/Finder/Adapter/AbstractFindAdapter.php
index 71097f2bf82a..dc6f644efcd2 100644
--- a/src/Symfony/Component/Finder/Adapter/AbstractFindAdapter.php
+++ b/src/Symfony/Component/Finder/Adapter/AbstractFindAdapter.php
@@ -77,7 +77,7 @@ public function searchInDirectory($dir)
         $this->buildDatesFiltering($find, $this->dates);
 
         $useGrep = $this->shell->testCommand('grep') && $this->shell->testCommand('xargs');
-        $useSort = is_int($this->sort) && $this->shell->testCommand('sort') && $this->shell->testCommand('cut');
+        $useSort = \is_int($this->sort) && $this->shell->testCommand('sort') && $this->shell->testCommand('cut');
 
         if ($useGrep && ($this->contains || $this->notContains)) {
             $grep = $command->ins('grep');
@@ -149,7 +149,7 @@ protected function buildFindCommand(Command $command, $dir)
      */
     private function buildNamesFiltering(Command $command, array $names, $not = false)
     {
-        if (0 === count($names)) {
+        if (0 === \count($names)) {
             return;
         }
 
@@ -197,7 +197,7 @@ private function buildNamesFiltering(Command $command, array $names, $not = fals
      */
     private function buildPathsFiltering(Command $command, $dir, array $paths, $not = false)
     {
-        if (0 === count($paths)) {
+        if (0 === \count($paths)) {
             return;
         }
 
diff --git a/src/Symfony/Component/Finder/Adapter/BsdFindAdapter.php b/src/Symfony/Component/Finder/Adapter/BsdFindAdapter.php
index d2bf6fbb229c..021515cbbdb7 100644
--- a/src/Symfony/Component/Finder/Adapter/BsdFindAdapter.php
+++ b/src/Symfony/Component/Finder/Adapter/BsdFindAdapter.php
@@ -40,7 +40,7 @@ public function getName()
      */
     protected function canBeUsed()
     {
-        return in_array($this->shell->getType(), array(Shell::TYPE_BSD, Shell::TYPE_DARWIN)) && parent::canBeUsed();
+        return \in_array($this->shell->getType(), array(Shell::TYPE_BSD, Shell::TYPE_DARWIN)) && parent::canBeUsed();
     }
 
     /**
diff --git a/src/Symfony/Component/Finder/Comparator/Comparator.php b/src/Symfony/Component/Finder/Comparator/Comparator.php
index 4f5e1ffe1239..ea37566df888 100644
--- a/src/Symfony/Component/Finder/Comparator/Comparator.php
+++ b/src/Symfony/Component/Finder/Comparator/Comparator.php
@@ -64,7 +64,7 @@ public function setOperator($operator)
             $operator = '==';
         }
 
-        if (!in_array($operator, array('>', '<', '>=', '<=', '==', '!='))) {
+        if (!\in_array($operator, array('>', '<', '>=', '<=', '==', '!='))) {
             throw new \InvalidArgumentException(sprintf('Invalid operator "%s".', $operator));
         }
 
diff --git a/src/Symfony/Component/Finder/Finder.php b/src/Symfony/Component/Finder/Finder.php
index 0c039ae6666d..105211cf2b51 100644
--- a/src/Symfony/Component/Finder/Finder.php
+++ b/src/Symfony/Component/Finder/Finder.php
@@ -651,7 +651,7 @@ public function in($dirs)
         foreach ((array) $dirs as $dir) {
             if (is_dir($dir)) {
                 $resolvedDirs[] = $this->normalizeDir($dir);
-            } elseif ($glob = glob($dir, (defined('GLOB_BRACE') ? GLOB_BRACE : 0) | GLOB_ONLYDIR)) {
+            } elseif ($glob = glob($dir, (\defined('GLOB_BRACE') ? GLOB_BRACE : 0) | GLOB_ONLYDIR)) {
                 $resolvedDirs = array_merge($resolvedDirs, array_map(array($this, 'normalizeDir'), $glob));
             } else {
                 throw new \InvalidArgumentException(sprintf('The "%s" directory does not exist.', $dir));
@@ -674,11 +674,11 @@ public function in($dirs)
      */
     public function getIterator()
     {
-        if (0 === count($this->dirs) && 0 === count($this->iterators)) {
+        if (0 === \count($this->dirs) && 0 === \count($this->iterators)) {
             throw new \LogicException('You must call one of in() or append() methods before iterating over a Finder.');
         }
 
-        if (1 === count($this->dirs) && 0 === count($this->iterators)) {
+        if (1 === \count($this->dirs) && 0 === \count($this->iterators)) {
             return $this->searchInDirectory($this->dirs[0]);
         }
 
@@ -711,7 +711,7 @@ public function append($iterator)
             $this->iterators[] = $iterator->getIterator();
         } elseif ($iterator instanceof \Iterator) {
             $this->iterators[] = $iterator;
-        } elseif ($iterator instanceof \Traversable || is_array($iterator)) {
+        } elseif ($iterator instanceof \Traversable || \is_array($iterator)) {
             $it = new \ArrayIterator();
             foreach ($iterator as $file) {
                 $it->append($file instanceof \SplFileInfo ? $file : new \SplFileInfo($file));
diff --git a/src/Symfony/Component/Finder/Glob.php b/src/Symfony/Component/Finder/Glob.php
index 953a0b3e9004..2e56cf280051 100644
--- a/src/Symfony/Component/Finder/Glob.php
+++ b/src/Symfony/Component/Finder/Glob.php
@@ -51,7 +51,7 @@ public static function toRegex($glob, $strictLeadingDot = true, $strictWildcardS
         $escaping = false;
         $inCurlies = 0;
         $regex = '';
-        $sizeGlob = strlen($glob);
+        $sizeGlob = \strlen($glob);
         for ($i = 0; $i < $sizeGlob; ++$i) {
             $car = $glob[$i];
             if ($firstByte) {
diff --git a/src/Symfony/Component/Finder/Iterator/CustomFilterIterator.php b/src/Symfony/Component/Finder/Iterator/CustomFilterIterator.php
index 399b6a9719c0..6666e07ec54b 100644
--- a/src/Symfony/Component/Finder/Iterator/CustomFilterIterator.php
+++ b/src/Symfony/Component/Finder/Iterator/CustomFilterIterator.php
@@ -32,7 +32,7 @@ class CustomFilterIterator extends FilterIterator
     public function __construct(\Iterator $iterator, array $filters)
     {
         foreach ($filters as $filter) {
-            if (!is_callable($filter)) {
+            if (!\is_callable($filter)) {
                 throw new \InvalidArgumentException('Invalid PHP callback.');
             }
         }
@@ -51,7 +51,7 @@ public function accept()
         $fileinfo = $this->current();
 
         foreach ($this->filters as $filter) {
-            if (false === call_user_func($filter, $fileinfo)) {
+            if (false === \call_user_func($filter, $fileinfo)) {
                 return false;
             }
         }
diff --git a/src/Symfony/Component/Finder/Iterator/FilePathsIterator.php b/src/Symfony/Component/Finder/Iterator/FilePathsIterator.php
index 4bc9b87fda40..9c4e5c4aab28 100644
--- a/src/Symfony/Component/Finder/Iterator/FilePathsIterator.php
+++ b/src/Symfony/Component/Finder/Iterator/FilePathsIterator.php
@@ -56,7 +56,7 @@ class FilePathsIterator extends \ArrayIterator
     public function __construct(array $paths, $baseDir)
     {
         $this->baseDir = $baseDir;
-        $this->baseDirLength = strlen($baseDir);
+        $this->baseDirLength = \strlen($baseDir);
 
         parent::__construct($paths);
     }
@@ -69,7 +69,7 @@ public function __construct(array $paths, $baseDir)
      */
     public function __call($name, array $arguments)
     {
-        return call_user_func_array(array($this->current(), $name), $arguments);
+        return \call_user_func_array(array($this->current(), $name), $arguments);
     }
 
     /**
@@ -124,7 +124,7 @@ private function buildProperties()
 
         if ($this->baseDir === substr($absolutePath, 0, $this->baseDirLength)) {
             $this->subPathname = ltrim(substr($absolutePath, $this->baseDirLength), '/\\');
-            $dir = dirname($this->subPathname);
+            $dir = \dirname($this->subPathname);
             $this->subPath = '.' === $dir ? '' : $dir;
         } else {
             $this->subPath = $this->subPathname = '';
diff --git a/src/Symfony/Component/Finder/Iterator/SortableIterator.php b/src/Symfony/Component/Finder/Iterator/SortableIterator.php
index c2f54b937652..53f8e31c6c42 100644
--- a/src/Symfony/Component/Finder/Iterator/SortableIterator.php
+++ b/src/Symfony/Component/Finder/Iterator/SortableIterator.php
@@ -63,7 +63,7 @@ public function __construct(\Traversable $iterator, $sort)
             $this->sort = function ($a, $b) {
                 return $a->getMTime() - $b->getMTime();
             };
-        } elseif (is_callable($sort)) {
+        } elseif (\is_callable($sort)) {
             $this->sort = $sort;
         } else {
             throw new \InvalidArgumentException('The SortableIterator takes a PHP callable or a valid built-in sort algorithm as an argument.');
diff --git a/src/Symfony/Component/Finder/Shell/Command.php b/src/Symfony/Component/Finder/Shell/Command.php
index fa385364d434..821907872347 100644
--- a/src/Symfony/Component/Finder/Shell/Command.php
+++ b/src/Symfony/Component/Finder/Shell/Command.php
@@ -154,7 +154,7 @@ public function ins($label)
         }
 
         $this->bits[] = self::create($this);
-        $this->labels[$label] = count($this->bits) - 1;
+        $this->labels[$label] = \count($this->bits) - 1;
 
         return $this->bits[$this->labels[$label]];
     }
@@ -200,7 +200,7 @@ public function end()
      */
     public function length()
     {
-        return count($this->bits);
+        return \count($this->bits);
     }
 
     /**
diff --git a/src/Symfony/Component/Finder/Shell/Shell.php b/src/Symfony/Component/Finder/Shell/Shell.php
index 65ede47c5fae..fa6ca4b9403f 100644
--- a/src/Symfony/Component/Finder/Shell/Shell.php
+++ b/src/Symfony/Component/Finder/Shell/Shell.php
@@ -54,7 +54,7 @@ public function getType()
      */
     public function testCommand($command)
     {
-        if (!function_exists('exec')) {
+        if (!\function_exists('exec')) {
             return false;
         }
 
@@ -68,7 +68,7 @@ public function testCommand($command)
 
         exec($testCommand.$command, $output, $code);
 
-        return 0 === $code && count($output) > 0;
+        return 0 === $code && \count($output) > 0;
     }
 
     /**
diff --git a/src/Symfony/Component/Finder/Tests/BsdFinderTest.php b/src/Symfony/Component/Finder/Tests/BsdFinderTest.php
index 9b8244810be4..a03012f58161 100644
--- a/src/Symfony/Component/Finder/Tests/BsdFinderTest.php
+++ b/src/Symfony/Component/Finder/Tests/BsdFinderTest.php
@@ -34,7 +34,7 @@ protected function buildFinder()
         $adapter = new BsdFindAdapter();
 
         if (!$adapter->isSupported()) {
-            $this->markTestSkipped(get_class($adapter).' is not supported.');
+            $this->markTestSkipped(\get_class($adapter).' is not supported.');
         }
 
         return Finder::create()
diff --git a/src/Symfony/Component/Finder/Tests/FinderTest.php b/src/Symfony/Component/Finder/Tests/FinderTest.php
index 2f20af02cfcc..85a9ebd29dce 100644
--- a/src/Symfony/Component/Finder/Tests/FinderTest.php
+++ b/src/Symfony/Component/Finder/Tests/FinderTest.php
@@ -465,7 +465,7 @@ public function testCountFiles()
     public function testCountWithoutIn()
     {
         $finder = Finder::create()->files();
-        count($finder);
+        \count($finder);
     }
 
     /**
diff --git a/src/Symfony/Component/Finder/Tests/GnuFinderTest.php b/src/Symfony/Component/Finder/Tests/GnuFinderTest.php
index 3a3b9b170989..80bc2ebe3144 100644
--- a/src/Symfony/Component/Finder/Tests/GnuFinderTest.php
+++ b/src/Symfony/Component/Finder/Tests/GnuFinderTest.php
@@ -34,7 +34,7 @@ protected function buildFinder()
         $adapter = new GnuFindAdapter();
 
         if (!$adapter->isSupported()) {
-            $this->markTestSkipped(get_class($adapter).' is not supported.');
+            $this->markTestSkipped(\get_class($adapter).' is not supported.');
         }
 
         return Finder::create()
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/IteratorTestCase.php b/src/Symfony/Component/Finder/Tests/Iterator/IteratorTestCase.php
index c724a75c692d..54606b91dded 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/IteratorTestCase.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/IteratorTestCase.php
@@ -52,7 +52,7 @@ protected function assertOrderedIteratorForGroups($expected, \Traversable $itera
 
         foreach ($expected as $subarray) {
             $temp = array();
-            while (count($values) && count($temp) < count($subarray)) {
+            while (\count($values) && \count($temp) < \count($subarray)) {
                 $temp[] = array_shift($values);
             }
             sort($temp);
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/MockSplFileInfo.php b/src/Symfony/Component/Finder/Tests/Iterator/MockSplFileInfo.php
index cfe31c90f741..36e6528d019b 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/MockSplFileInfo.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/MockSplFileInfo.php
@@ -25,9 +25,9 @@ class MockSplFileInfo extends \SplFileInfo
 
     public function __construct($param)
     {
-        if (is_string($param)) {
+        if (\is_string($param)) {
             parent::__construct($param);
-        } elseif (is_array($param)) {
+        } elseif (\is_array($param)) {
             $defaults = array(
               'name' => 'file.txt',
               'contents' => null,
@@ -92,7 +92,7 @@ public function setMode($mode)
 
     public function setType($type)
     {
-        if (is_string($type)) {
+        if (\is_string($type)) {
             switch ($type) {
                 case 'directory':
                 case 'd':
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/RealIteratorTestCase.php b/src/Symfony/Component/Finder/Tests/Iterator/RealIteratorTestCase.php
index 4f274e2d12ef..1e1f7ac00785 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/RealIteratorTestCase.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/RealIteratorTestCase.php
@@ -44,7 +44,7 @@ public static function setUpBeforeClass()
         }
 
         foreach (self::$files as $file) {
-            if (DIRECTORY_SEPARATOR === $file[strlen($file) - 1]) {
+            if (DIRECTORY_SEPARATOR === $file[\strlen($file) - 1]) {
                 mkdir($file);
             } else {
                 touch($file);
@@ -87,10 +87,10 @@ protected static function toAbsolute($files = null)
             self::$tmpDir = realpath(sys_get_temp_dir()).DIRECTORY_SEPARATOR.'symfony_finder';
         }
 
-        if (is_array($files)) {
+        if (\is_array($files)) {
             $f = array();
             foreach ($files as $file) {
-                if (is_array($file)) {
+                if (\is_array($file)) {
                     $f[] = self::toAbsolute($file);
                 } else {
                     $f[] = self::$tmpDir.DIRECTORY_SEPARATOR.str_replace('/', DIRECTORY_SEPARATOR, $file);
@@ -100,7 +100,7 @@ protected static function toAbsolute($files = null)
             return $f;
         }
 
-        if (is_string($files)) {
+        if (\is_string($files)) {
             return self::$tmpDir.DIRECTORY_SEPARATOR.str_replace('/', DIRECTORY_SEPARATOR, $files);
         }
 
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/SortableIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/SortableIteratorTest.php
index 444654a28fb6..071409586893 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/SortableIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/SortableIteratorTest.php
@@ -30,7 +30,7 @@ public function testConstructor()
      */
     public function testAccept($mode, $expected)
     {
-        if (!is_callable($mode)) {
+        if (!\is_callable($mode)) {
             switch ($mode) {
                 case SortableIterator::SORT_BY_ACCESSED_TIME:
                     if ('\\' === DIRECTORY_SEPARATOR) {
diff --git a/src/Symfony/Component/Finder/Tests/PhpFinderTest.php b/src/Symfony/Component/Finder/Tests/PhpFinderTest.php
index b188340ef338..d095d5efe696 100644
--- a/src/Symfony/Component/Finder/Tests/PhpFinderTest.php
+++ b/src/Symfony/Component/Finder/Tests/PhpFinderTest.php
@@ -24,11 +24,11 @@ public function testImplementationsAreSynchronized()
         $adapterReflector = new \ReflectionMethod('Symfony\Component\Finder\Adapter\PhpAdapter', 'searchInDirectory');
         $finderReflector = new \ReflectionMethod('Symfony\Component\Finder\Finder', 'searchInDirectory');
 
-        $adapterSource = array_slice(file($adapterReflector->getFileName()), $adapterReflector->getStartLine() + 1, $adapterReflector->getEndLine() - $adapterReflector->getStartLine() - 1);
+        $adapterSource = \array_slice(file($adapterReflector->getFileName()), $adapterReflector->getStartLine() + 1, $adapterReflector->getEndLine() - $adapterReflector->getStartLine() - 1);
         $adapterSource = implode('', $adapterSource);
         $adapterSource = str_replace(array('$this->minDepth', '$this->maxDepth'), array('$minDepth', '$maxDepth'), $adapterSource);
 
-        $finderSource = array_slice(file($finderReflector->getFileName()), $finderReflector->getStartLine() + 1, $finderReflector->getEndLine() - $finderReflector->getStartLine() - 1);
+        $finderSource = \array_slice(file($finderReflector->getFileName()), $finderReflector->getStartLine() + 1, $finderReflector->getEndLine() - $finderReflector->getStartLine() - 1);
         $finderSource = implode('', $finderSource);
 
         $this->assertStringEndsWith($adapterSource, $finderSource);
diff --git a/src/Symfony/Component/Form/AbstractExtension.php b/src/Symfony/Component/Form/AbstractExtension.php
index 2233a83a416b..3876c21efbbc 100644
--- a/src/Symfony/Component/Form/AbstractExtension.php
+++ b/src/Symfony/Component/Form/AbstractExtension.php
@@ -98,7 +98,7 @@ public function hasTypeExtensions($name)
             $this->initTypeExtensions();
         }
 
-        return isset($this->typeExtensions[$name]) && count($this->typeExtensions[$name]) > 0;
+        return isset($this->typeExtensions[$name]) && \count($this->typeExtensions[$name]) > 0;
     }
 
     /**
@@ -157,7 +157,7 @@ private function initTypes()
             }
 
             // Since Symfony 3.0 types are identified by their FQCN
-            $fqcn = get_class($type);
+            $fqcn = \get_class($type);
             $legacyName = $type->getName();
 
             $this->types[$fqcn] = $type;
diff --git a/src/Symfony/Component/Form/AbstractRendererEngine.php b/src/Symfony/Component/Form/AbstractRendererEngine.php
index 970352ce9ada..e3a5166b4225 100644
--- a/src/Symfony/Component/Form/AbstractRendererEngine.php
+++ b/src/Symfony/Component/Form/AbstractRendererEngine.php
@@ -48,7 +48,7 @@ public function setTheme(FormView $view, $themes)
         $cacheKey = $view->vars[self::CACHE_KEY_VAR];
 
         // Do not cast, as casting turns objects into arrays of properties
-        $this->themes[$cacheKey] = is_array($themes) ? $themes : array($themes);
+        $this->themes[$cacheKey] = \is_array($themes) ? $themes : array($themes);
 
         // Unset instead of resetting to an empty array, in order to allow
         // implementations (like TwigRendererEngine) to check whether $cacheKey
diff --git a/src/Symfony/Component/Form/AbstractType.php b/src/Symfony/Component/Form/AbstractType.php
index ac0add2b8e55..512d512a8a5d 100644
--- a/src/Symfony/Component/Form/AbstractType.php
+++ b/src/Symfony/Component/Form/AbstractType.php
@@ -47,7 +47,7 @@ public function finishView(FormView $view, FormInterface $form, array $options)
     public function setDefaultOptions(OptionsResolverInterface $resolver)
     {
         if (!$resolver instanceof OptionsResolver) {
-            throw new \InvalidArgumentException(sprintf('Custom resolver "%s" must extend "Symfony\Component\OptionsResolver\OptionsResolver".', get_class($resolver)));
+            throw new \InvalidArgumentException(sprintf('Custom resolver "%s" must extend "Symfony\Component\OptionsResolver\OptionsResolver".', \get_class($resolver)));
         }
 
         $this->configureOptions($resolver);
@@ -68,7 +68,7 @@ public function configureOptions(OptionsResolver $resolver)
     public function getName()
     {
         // As of Symfony 2.8, the name defaults to the fully-qualified class name
-        return get_class($this);
+        return \get_class($this);
     }
 
     /**
@@ -81,7 +81,7 @@ public function getName()
      */
     public function getBlockPrefix()
     {
-        $fqcn = get_class($this);
+        $fqcn = \get_class($this);
         $name = $this->getName();
 
         // For BC: Use the name as block prefix if one is set
diff --git a/src/Symfony/Component/Form/AbstractTypeExtension.php b/src/Symfony/Component/Form/AbstractTypeExtension.php
index 268c94354c04..8fafc2994db7 100644
--- a/src/Symfony/Component/Form/AbstractTypeExtension.php
+++ b/src/Symfony/Component/Form/AbstractTypeExtension.php
@@ -46,7 +46,7 @@ public function finishView(FormView $view, FormInterface $form, array $options)
     public function setDefaultOptions(OptionsResolverInterface $resolver)
     {
         if (!$resolver instanceof OptionsResolver) {
-            throw new \InvalidArgumentException(sprintf('Custom resolver "%s" must extend "Symfony\Component\OptionsResolver\OptionsResolver".', get_class($resolver)));
+            throw new \InvalidArgumentException(sprintf('Custom resolver "%s" must extend "Symfony\Component\OptionsResolver\OptionsResolver".', \get_class($resolver)));
         }
 
         $this->configureOptions($resolver);
diff --git a/src/Symfony/Component/Form/CallbackTransformer.php b/src/Symfony/Component/Form/CallbackTransformer.php
index d80c2e9250de..5a3d5b09b2ef 100644
--- a/src/Symfony/Component/Form/CallbackTransformer.php
+++ b/src/Symfony/Component/Form/CallbackTransformer.php
@@ -27,10 +27,10 @@ class CallbackTransformer implements DataTransformerInterface
      */
     public function __construct($transform, $reverseTransform)
     {
-        if (!is_callable($transform)) {
+        if (!\is_callable($transform)) {
             throw new \InvalidArgumentException('Argument 1 should be a callable');
         }
-        if (!is_callable($reverseTransform)) {
+        if (!\is_callable($reverseTransform)) {
             throw new \InvalidArgumentException('Argument 2 should be a callable');
         }
 
@@ -50,7 +50,7 @@ public function __construct($transform, $reverseTransform)
      */
     public function transform($data)
     {
-        return call_user_func($this->transform, $data);
+        return \call_user_func($this->transform, $data);
     }
 
     /**
@@ -66,6 +66,6 @@ public function transform($data)
      */
     public function reverseTransform($data)
     {
-        return call_user_func($this->reverseTransform, $data);
+        return \call_user_func($this->reverseTransform, $data);
     }
 }
diff --git a/src/Symfony/Component/Form/ChoiceList/ArrayChoiceList.php b/src/Symfony/Component/Form/ChoiceList/ArrayChoiceList.php
index 418aa3200cc1..3e350c39c298 100644
--- a/src/Symfony/Component/Form/ChoiceList/ArrayChoiceList.php
+++ b/src/Symfony/Component/Form/ChoiceList/ArrayChoiceList.php
@@ -66,7 +66,7 @@ class ArrayChoiceList implements ChoiceListInterface
      */
     public function __construct($choices, $value = null)
     {
-        if (null !== $value && !is_callable($value)) {
+        if (null !== $value && !\is_callable($value)) {
             throw new UnexpectedTypeException($value, 'null or callable');
         }
 
@@ -161,7 +161,7 @@ public function getValuesForChoices(array $choices)
             $givenValues = array();
 
             foreach ($choices as $i => $givenChoice) {
-                $givenValues[$i] = (string) call_user_func($this->valueCallback, $givenChoice);
+                $givenValues[$i] = (string) \call_user_func($this->valueCallback, $givenChoice);
             }
 
             return array_intersect($givenValues, array_keys($this->choices));
@@ -202,13 +202,13 @@ protected function flatten(array $choices, $value, &$choicesByValues, &$keysByVa
         }
 
         foreach ($choices as $key => $choice) {
-            if (is_array($choice)) {
+            if (\is_array($choice)) {
                 $this->flatten($choice, $value, $choicesByValues, $keysByValues, $structuredValues[$key]);
 
                 continue;
             }
 
-            $choiceValue = (string) call_user_func($value, $choice);
+            $choiceValue = (string) \call_user_func($value, $choice);
             $choicesByValues[$choiceValue] = $choice;
             $keysByValues[$choiceValue] = $key;
             $structuredValues[$key] = $choiceValue;
@@ -228,7 +228,7 @@ protected function flatten(array $choices, $value, &$choicesByValues, &$keysByVa
     private function castableToString(array $choices, array &$cache = array())
     {
         foreach ($choices as $choice) {
-            if (is_array($choice)) {
+            if (\is_array($choice)) {
                 if (!$this->castableToString($choice, $cache)) {
                     return false;
                 }
diff --git a/src/Symfony/Component/Form/ChoiceList/ArrayKeyChoiceList.php b/src/Symfony/Component/Form/ChoiceList/ArrayKeyChoiceList.php
index 40081c69b2cf..b51a5a575f7d 100644
--- a/src/Symfony/Component/Form/ChoiceList/ArrayKeyChoiceList.php
+++ b/src/Symfony/Component/Form/ChoiceList/ArrayKeyChoiceList.php
@@ -74,11 +74,11 @@ public static function toArrayKey($choice)
         if (!is_scalar($choice) && null !== $choice) {
             throw new InvalidArgumentException(sprintf(
                 'The value of type "%s" cannot be converted to a valid array key.',
-                gettype($choice)
+                \gettype($choice)
             ));
         }
 
-        if (is_bool($choice) || (string) (int) $choice === (string) $choice) {
+        if (\is_bool($choice) || (string) (int) $choice === (string) $choice) {
             return (int) $choice;
         }
 
@@ -176,13 +176,13 @@ protected function flatten(array $choices, $value, &$choicesByValues, &$keysByVa
         }
 
         foreach ($choices as $choice => $key) {
-            if (is_array($key)) {
+            if (\is_array($key)) {
                 $this->flatten($key, $value, $choicesByValues, $keysByValues, $structuredValues[$choice]);
 
                 continue;
             }
 
-            $choiceValue = (string) call_user_func($value, $choice);
+            $choiceValue = (string) \call_user_func($value, $choice);
             $choicesByValues[$choiceValue] = $choice;
             $keysByValues[$choiceValue] = $key;
             $structuredValues[$key] = $choiceValue;
diff --git a/src/Symfony/Component/Form/ChoiceList/Factory/CachingFactoryDecorator.php b/src/Symfony/Component/Form/ChoiceList/Factory/CachingFactoryDecorator.php
index d7a62730ef33..911c1387b985 100644
--- a/src/Symfony/Component/Form/ChoiceList/Factory/CachingFactoryDecorator.php
+++ b/src/Symfony/Component/Form/ChoiceList/Factory/CachingFactoryDecorator.php
@@ -49,11 +49,11 @@ class CachingFactoryDecorator implements ChoiceListFactoryInterface
      */
     public static function generateHash($value, $namespace = '')
     {
-        if (is_object($value)) {
+        if (\is_object($value)) {
             $value = spl_object_hash($value);
-        } elseif (is_array($value)) {
+        } elseif (\is_array($value)) {
             array_walk_recursive($value, function (&$v) {
-                if (is_object($v)) {
+                if (\is_object($v)) {
                     $v = spl_object_hash($v);
                 }
             });
@@ -77,7 +77,7 @@ private static function flatten(array $array, &$output)
         }
 
         foreach ($array as $key => $value) {
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 self::flatten($value, $output);
                 continue;
             }
diff --git a/src/Symfony/Component/Form/ChoiceList/Factory/DefaultChoiceListFactory.php b/src/Symfony/Component/Form/ChoiceList/Factory/DefaultChoiceListFactory.php
index 9ef999dcb641..93e939ec300e 100644
--- a/src/Symfony/Component/Form/ChoiceList/Factory/DefaultChoiceListFactory.php
+++ b/src/Symfony/Component/Form/ChoiceList/Factory/DefaultChoiceListFactory.php
@@ -87,9 +87,9 @@ public function createView(ChoiceListInterface $list, $preferredChoices = null,
         $choices = $list->getChoices();
         $keys = $list->getOriginalKeys();
 
-        if (!is_callable($preferredChoices) && !empty($preferredChoices)) {
+        if (!\is_callable($preferredChoices) && !empty($preferredChoices)) {
             $preferredChoices = function ($choice) use ($preferredChoices) {
-                return in_array($choice, $preferredChoices, true);
+                return \in_array($choice, $preferredChoices, true);
             };
         }
 
@@ -101,7 +101,7 @@ public function createView(ChoiceListInterface $list, $preferredChoices = null,
         // If $groupBy is a callable, choices are added to the group with the
         // name returned by the callable. If the callable returns null, the
         // choice is not added to any group
-        if (is_callable($groupBy)) {
+        if (\is_callable($groupBy)) {
             foreach ($choices as $value => $choice) {
                 self::addChoiceViewGroupedBy(
                     $groupBy,
@@ -134,13 +134,13 @@ public function createView(ChoiceListInterface $list, $preferredChoices = null,
         // Remove any empty group view that may have been created by
         // addChoiceViewGroupedBy()
         foreach ($preferredViews as $key => $view) {
-            if ($view instanceof ChoiceGroupView && 0 === count($view->choices)) {
+            if ($view instanceof ChoiceGroupView && 0 === \count($view->choices)) {
                 unset($preferredViews[$key]);
             }
         }
 
         foreach ($otherViews as $key => $view) {
-            if ($view instanceof ChoiceGroupView && 0 === count($view->choices)) {
+            if ($view instanceof ChoiceGroupView && 0 === \count($view->choices)) {
                 unset($otherViews[$key]);
             }
         }
@@ -153,7 +153,7 @@ private static function addChoiceView($choice, $value, $label, $keys, &$index, $
         // $value may be an integer or a string, since it's stored in the array
         // keys. We want to guarantee it's a string though.
         $key = $keys[$value];
-        $nextIndex = is_int($index) ? $index++ : call_user_func($index, $choice, $key, $value);
+        $nextIndex = \is_int($index) ? $index++ : \call_user_func($index, $choice, $key, $value);
 
         // BC normalize label to accept a false value
         if (null === $label) {
@@ -162,7 +162,7 @@ private static function addChoiceView($choice, $value, $label, $keys, &$index, $
         } elseif (false !== $label) {
             // If "choice_label" is set to false and "expanded" is true, the value false
             // should be passed on to the "label" option of the checkboxes/radio buttons
-            $dynamicLabel = call_user_func($label, $choice, $key, $value);
+            $dynamicLabel = \call_user_func($label, $choice, $key, $value);
             $label = false === $dynamicLabel ? false : (string) $dynamicLabel;
         }
 
@@ -172,11 +172,11 @@ private static function addChoiceView($choice, $value, $label, $keys, &$index, $
             $label,
             // The attributes may be a callable or a mapping from choice indices
             // to nested arrays
-            is_callable($attr) ? call_user_func($attr, $choice, $key, $value) : (isset($attr[$key]) ? $attr[$key] : array())
+            \is_callable($attr) ? \call_user_func($attr, $choice, $key, $value) : (isset($attr[$key]) ? $attr[$key] : array())
         );
 
         // $isPreferred may be null if no choices are preferred
-        if ($isPreferred && call_user_func($isPreferred, $choice, $key, $value)) {
+        if ($isPreferred && \call_user_func($isPreferred, $choice, $key, $value)) {
             $preferredViews[$nextIndex] = $view;
         } else {
             $otherViews[$nextIndex] = $view;
@@ -191,7 +191,7 @@ private static function addChoiceViewsGroupedBy($groupBy, $label, $choices, $key
             }
 
             // Add the contents of groups to new ChoiceGroupView instances
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 $preferredViewsForGroup = array();
                 $otherViewsForGroup = array();
 
@@ -207,11 +207,11 @@ private static function addChoiceViewsGroupedBy($groupBy, $label, $choices, $key
                     $otherViewsForGroup
                 );
 
-                if (count($preferredViewsForGroup) > 0) {
+                if (\count($preferredViewsForGroup) > 0) {
                     $preferredViews[$key] = new ChoiceGroupView($key, $preferredViewsForGroup);
                 }
 
-                if (count($otherViewsForGroup) > 0) {
+                if (\count($otherViewsForGroup) > 0) {
                     $otherViews[$key] = new ChoiceGroupView($key, $otherViewsForGroup);
                 }
 
@@ -235,7 +235,7 @@ private static function addChoiceViewsGroupedBy($groupBy, $label, $choices, $key
 
     private static function addChoiceViewGroupedBy($groupBy, $choice, $value, $label, $keys, &$index, $attr, $isPreferred, &$preferredViews, &$otherViews)
     {
-        $groupLabel = call_user_func($groupBy, $choice, $keys[$value], $value);
+        $groupLabel = \call_user_func($groupBy, $choice, $keys[$value], $value);
 
         if (null === $groupLabel) {
             // If the callable returns null, don't group the choice
diff --git a/src/Symfony/Component/Form/ChoiceList/Factory/PropertyAccessDecorator.php b/src/Symfony/Component/Form/ChoiceList/Factory/PropertyAccessDecorator.php
index 42f7b916f6ed..146669b27f7e 100644
--- a/src/Symfony/Component/Form/ChoiceList/Factory/PropertyAccessDecorator.php
+++ b/src/Symfony/Component/Form/ChoiceList/Factory/PropertyAccessDecorator.php
@@ -71,7 +71,7 @@ public function getDecoratedFactory()
      */
     public function createListFromChoices($choices, $value = null)
     {
-        if (is_string($value) && !is_callable($value)) {
+        if (\is_string($value) && !\is_callable($value)) {
             $value = new PropertyPath($value);
         }
 
@@ -82,7 +82,7 @@ public function createListFromChoices($choices, $value = null)
                 // when such values are passed to
                 // ChoiceListInterface::getValuesForChoices(). Handle this case
                 // so that the call to getValue() doesn't break.
-                if (is_object($choice) || is_array($choice)) {
+                if (\is_object($choice) || \is_array($choice)) {
                     return $accessor->getValue($choice, $value);
                 }
             };
@@ -121,7 +121,7 @@ public function createListFromFlippedChoices($choices, $value = null, $triggerDe
      */
     public function createListFromLoader(ChoiceLoaderInterface $loader, $value = null)
     {
-        if (is_string($value) && !is_callable($value)) {
+        if (\is_string($value) && !\is_callable($value)) {
             $value = new PropertyPath($value);
         }
 
@@ -132,7 +132,7 @@ public function createListFromLoader(ChoiceLoaderInterface $loader, $value = nul
                 // when such values are passed to
                 // ChoiceListInterface::getValuesForChoices(). Handle this case
                 // so that the call to getValue() doesn't break.
-                if (is_object($choice) || is_array($choice)) {
+                if (\is_object($choice) || \is_array($choice)) {
                     return $accessor->getValue($choice, $value);
                 }
             };
@@ -157,7 +157,7 @@ public function createView(ChoiceListInterface $list, $preferredChoices = null,
     {
         $accessor = $this->propertyAccessor;
 
-        if (is_string($label) && !is_callable($label)) {
+        if (\is_string($label) && !\is_callable($label)) {
             $label = new PropertyPath($label);
         }
 
@@ -167,7 +167,7 @@ public function createView(ChoiceListInterface $list, $preferredChoices = null,
             };
         }
 
-        if (is_string($preferredChoices) && !is_callable($preferredChoices)) {
+        if (\is_string($preferredChoices) && !\is_callable($preferredChoices)) {
             $preferredChoices = new PropertyPath($preferredChoices);
         }
 
@@ -182,7 +182,7 @@ public function createView(ChoiceListInterface $list, $preferredChoices = null,
             };
         }
 
-        if (is_string($index) && !is_callable($index)) {
+        if (\is_string($index) && !\is_callable($index)) {
             $index = new PropertyPath($index);
         }
 
@@ -192,7 +192,7 @@ public function createView(ChoiceListInterface $list, $preferredChoices = null,
             };
         }
 
-        if (is_string($groupBy) && !is_callable($groupBy)) {
+        if (\is_string($groupBy) && !\is_callable($groupBy)) {
             $groupBy = new PropertyPath($groupBy);
         }
 
@@ -206,7 +206,7 @@ public function createView(ChoiceListInterface $list, $preferredChoices = null,
             };
         }
 
-        if (is_string($attr) && !is_callable($attr)) {
+        if (\is_string($attr) && !\is_callable($attr)) {
             $attr = new PropertyPath($attr);
         }
 
diff --git a/src/Symfony/Component/Form/Exception/AlreadyBoundException.php b/src/Symfony/Component/Form/Exception/AlreadyBoundException.php
index 4616835e72f8..534f4356ac70 100644
--- a/src/Symfony/Component/Form/Exception/AlreadyBoundException.php
+++ b/src/Symfony/Component/Form/Exception/AlreadyBoundException.php
@@ -21,7 +21,7 @@ class AlreadyBoundException extends LogicException
 {
     public function __construct($message = '', $code = 0, \Exception $previous = null)
     {
-        if (__CLASS__ === get_class($this)) {
+        if (__CLASS__ === \get_class($this)) {
             @trigger_error('The '.__CLASS__.' class is deprecated since Symfony 2.3 and will be removed in 3.0. Use the Symfony\Component\Form\Exception\AlreadySubmittedException class instead.', E_USER_DEPRECATED);
         }
 
diff --git a/src/Symfony/Component/Form/Exception/UnexpectedTypeException.php b/src/Symfony/Component/Form/Exception/UnexpectedTypeException.php
index 474e244bd84b..6267d1a9c174 100644
--- a/src/Symfony/Component/Form/Exception/UnexpectedTypeException.php
+++ b/src/Symfony/Component/Form/Exception/UnexpectedTypeException.php
@@ -15,6 +15,6 @@ class UnexpectedTypeException extends InvalidArgumentException
 {
     public function __construct($value, $expectedType)
     {
-        parent::__construct(sprintf('Expected argument of type "%s", "%s" given', $expectedType, is_object($value) ? get_class($value) : gettype($value)));
+        parent::__construct(sprintf('Expected argument of type "%s", "%s" given', $expectedType, \is_object($value) ? \get_class($value) : \gettype($value)));
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Core/ChoiceList/ChoiceList.php b/src/Symfony/Component/Form/Extension/Core/ChoiceList/ChoiceList.php
index 6fbacfde68f5..60d7f2ca83be 100644
--- a/src/Symfony/Component/Form/Extension/Core/ChoiceList/ChoiceList.php
+++ b/src/Symfony/Component/Form/Extension/Core/ChoiceList/ChoiceList.php
@@ -81,7 +81,7 @@ class ChoiceList implements ChoiceListInterface
      */
     public function __construct($choices, array $labels, array $preferredChoices = array())
     {
-        if (!is_array($choices) && !$choices instanceof \Traversable) {
+        if (!\is_array($choices) && !$choices instanceof \Traversable) {
             throw new UnexpectedTypeException($choices, 'array or \Traversable');
         }
 
@@ -159,7 +159,7 @@ public function getChoicesForValues(array $values)
                     $choices[$i] = $this->choices[$j];
                     unset($values[$i]);
 
-                    if (0 === count($values)) {
+                    if (0 === \count($values)) {
                         break 2;
                     }
                 }
@@ -183,7 +183,7 @@ public function getValuesForChoices(array $choices)
                     $values[$i] = $this->values[$j];
                     unset($choices[$i]);
 
-                    if (0 === count($choices)) {
+                    if (0 === \count($choices)) {
                         break 2;
                     }
                 }
@@ -211,7 +211,7 @@ public function getIndicesForChoices(array $choices)
                     $indices[$i] = $j;
                     unset($choices[$i]);
 
-                    if (0 === count($choices)) {
+                    if (0 === \count($choices)) {
                         break 2;
                     }
                 }
@@ -239,7 +239,7 @@ public function getIndicesForValues(array $values)
                     $indices[$i] = $j;
                     unset($values[$i]);
 
-                    if (0 === count($values)) {
+                    if (0 === \count($values)) {
                         break 2;
                     }
                 }
@@ -269,9 +269,9 @@ protected function addChoices(array &$bucketForPreferred, array &$bucketForRemai
                 throw new InvalidArgumentException('The structures of the choices and labels array do not match.');
             }
 
-            if (is_array($choice)) {
+            if (\is_array($choice)) {
                 // Don't do the work if the array is empty
-                if (count($choice) > 0) {
+                if (\count($choice) > 0) {
                     $this->addChoiceGroup(
                         $group,
                         $bucketForPreferred,
@@ -350,8 +350,8 @@ protected function addChoice(array &$bucketForPreferred, array &$bucketForRemain
 
         $value = $this->createValue($choice);
 
-        if (!is_string($value)) {
-            throw new InvalidConfigurationException(sprintf('The value created by the choice list is of type "%s", but should be a string.', gettype($value)));
+        if (!\is_string($value)) {
+            throw new InvalidConfigurationException(sprintf('The value created by the choice list is of type "%s", but should be a string.', \gettype($value)));
         }
 
         $view = new ChoiceView($choice, $value, $label);
@@ -380,7 +380,7 @@ protected function addChoice(array &$bucketForPreferred, array &$bucketForRemain
      */
     protected function isPreferred($choice, array $preferredChoices)
     {
-        return in_array($choice, $preferredChoices, true);
+        return \in_array($choice, $preferredChoices, true);
     }
 
     /**
@@ -395,7 +395,7 @@ protected function isPreferred($choice, array $preferredChoices)
      */
     protected function createIndex($choice)
     {
-        return count($this->choices);
+        return \count($this->choices);
     }
 
     /**
@@ -411,7 +411,7 @@ protected function createIndex($choice)
      */
     protected function createValue($choice)
     {
-        return (string) count($this->values);
+        return (string) \count($this->values);
     }
 
     /**
@@ -454,7 +454,7 @@ protected function fixValues(array $values)
      */
     protected function fixIndex($index)
     {
-        if (is_bool($index) || (string) (int) $index === (string) $index) {
+        if (\is_bool($index) || (string) (int) $index === (string) $index) {
             return (int) $index;
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/ChoiceList/LazyChoiceList.php b/src/Symfony/Component/Form/Extension/Core/ChoiceList/LazyChoiceList.php
index 402e05343e2f..b88299d95a1f 100644
--- a/src/Symfony/Component/Form/Extension/Core/ChoiceList/LazyChoiceList.php
+++ b/src/Symfony/Component/Form/Extension/Core/ChoiceList/LazyChoiceList.php
@@ -154,7 +154,7 @@ private function load()
         $choiceList = $this->loadChoiceList();
 
         if (!$choiceList instanceof ChoiceListInterface) {
-            throw new InvalidArgumentException(sprintf('loadChoiceList() should return a ChoiceListInterface instance. Got %s', gettype($choiceList)));
+            throw new InvalidArgumentException(sprintf('loadChoiceList() should return a ChoiceListInterface instance. Got %s', \gettype($choiceList)));
         }
 
         $this->choiceList = $choiceList;
diff --git a/src/Symfony/Component/Form/Extension/Core/ChoiceList/ObjectChoiceList.php b/src/Symfony/Component/Form/Extension/Core/ChoiceList/ObjectChoiceList.php
index c9fdd0b7624e..086b55ad93df 100644
--- a/src/Symfony/Component/Form/Extension/Core/ChoiceList/ObjectChoiceList.php
+++ b/src/Symfony/Component/Form/Extension/Core/ChoiceList/ObjectChoiceList.php
@@ -118,7 +118,7 @@ protected function initialize($choices, array $labels, array $preferredChoices)
             $groupedChoices = array();
 
             foreach ($choices as $i => $choice) {
-                if (is_array($choice)) {
+                if (\is_array($choice)) {
                     throw new InvalidArgumentException('You should pass a plain object array (without groups) when using the "groupPath" option.');
                 }
 
@@ -168,7 +168,7 @@ public function getValuesForChoices(array $choices)
 
         foreach ($choices as $i => $givenChoice) {
             // Ignore non-readable choices
-            if (!is_object($givenChoice) && !is_array($givenChoice)) {
+            if (!\is_object($givenChoice) && !\is_array($givenChoice)) {
                 continue;
             }
 
@@ -179,7 +179,7 @@ public function getValuesForChoices(array $choices)
                     $values[$i] = $value;
                     unset($choices[$i]);
 
-                    if (0 === count($choices)) {
+                    if (0 === \count($choices)) {
                         break 2;
                     }
                 }
@@ -208,7 +208,7 @@ public function getIndicesForChoices(array $choices)
 
         foreach ($choices as $i => $givenChoice) {
             // Ignore non-readable choices
-            if (!is_object($givenChoice) && !is_array($givenChoice)) {
+            if (!\is_object($givenChoice) && !\is_array($givenChoice)) {
                 continue;
             }
 
@@ -219,7 +219,7 @@ public function getIndicesForChoices(array $choices)
                     $indices[$i] = $j;
                     unset($choices[$i]);
 
-                    if (0 === count($choices)) {
+                    if (0 === \count($choices)) {
                         break 2;
                     }
                 }
@@ -252,7 +252,7 @@ protected function createValue($choice)
     private function extractLabels($choices, array &$labels)
     {
         foreach ($choices as $i => $choice) {
-            if (is_array($choice)) {
+            if (\is_array($choice)) {
                 $labels[$i] = array();
                 $this->extractLabels($choice, $labels[$i]);
             } elseif ($this->labelPath) {
@@ -260,7 +260,7 @@ private function extractLabels($choices, array &$labels)
             } elseif (method_exists($choice, '__toString')) {
                 $labels[$i] = (string) $choice;
             } else {
-                throw new StringCastException(sprintf('A "__toString()" method was not found on the objects of type "%s" passed to the choice field. To read a custom getter instead, set the argument $labelPath to the desired property path.', get_class($choice)));
+                throw new StringCastException(sprintf('A "__toString()" method was not found on the objects of type "%s" passed to the choice field. To read a custom getter instead, set the argument $labelPath to the desired property path.', \get_class($choice)));
             }
         }
     }
diff --git a/src/Symfony/Component/Form/Extension/Core/ChoiceList/SimpleChoiceList.php b/src/Symfony/Component/Form/Extension/Core/ChoiceList/SimpleChoiceList.php
index 72e659e61506..7255b1254ee3 100644
--- a/src/Symfony/Component/Form/Extension/Core/ChoiceList/SimpleChoiceList.php
+++ b/src/Symfony/Component/Form/Extension/Core/ChoiceList/SimpleChoiceList.php
@@ -93,9 +93,9 @@ protected function addChoices(array &$bucketForPreferred, array &$bucketForRemai
     {
         // Add choices to the nested buckets
         foreach ($choices as $choice => $label) {
-            if (is_array($label)) {
+            if (\is_array($label)) {
                 // Don't do the work if the array is empty
-                if (count($label) > 0) {
+                if (\count($label) > 0) {
                     $this->addChoiceGroup(
                         $choice,
                         $bucketForPreferred,
diff --git a/src/Symfony/Component/Form/Extension/Core/DataMapper/CheckboxListMapper.php b/src/Symfony/Component/Form/Extension/Core/DataMapper/CheckboxListMapper.php
index b85fb0025fe6..5e2101022278 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataMapper/CheckboxListMapper.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataMapper/CheckboxListMapper.php
@@ -34,13 +34,13 @@ public function mapDataToForms($choices, $checkboxes)
             $choices = array();
         }
 
-        if (!is_array($choices)) {
+        if (!\is_array($choices)) {
             throw new UnexpectedTypeException($choices, 'array');
         }
 
         foreach ($checkboxes as $checkbox) {
             $value = $checkbox->getConfig()->getOption('value');
-            $checkbox->setData(in_array($value, $choices, true));
+            $checkbox->setData(\in_array($value, $choices, true));
         }
     }
 
@@ -49,7 +49,7 @@ public function mapDataToForms($choices, $checkboxes)
      */
     public function mapFormsToData($checkboxes, &$choices)
     {
-        if (!is_array($choices)) {
+        if (!\is_array($choices)) {
             throw new UnexpectedTypeException($choices, 'array');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataMapper/PropertyPathMapper.php b/src/Symfony/Component/Form/Extension/Core/DataMapper/PropertyPathMapper.php
index 25aba9a16d43..f9721e52b176 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataMapper/PropertyPathMapper.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataMapper/PropertyPathMapper.php
@@ -37,7 +37,7 @@ public function mapDataToForms($data, $forms)
     {
         $empty = null === $data || array() === $data;
 
-        if (!$empty && !is_array($data) && !is_object($data)) {
+        if (!$empty && !\is_array($data) && !\is_object($data)) {
             throw new UnexpectedTypeException($data, 'object, array or empty');
         }
 
@@ -62,7 +62,7 @@ public function mapFormsToData($forms, &$data)
             return;
         }
 
-        if (!is_array($data) && !is_object($data)) {
+        if (!\is_array($data) && !\is_object($data)) {
             throw new UnexpectedTypeException($data, 'object, array or empty');
         }
 
@@ -81,7 +81,7 @@ public function mapFormsToData($forms, &$data)
 
                 // If the data is identical to the value in $data, we are
                 // dealing with a reference
-                if (!is_object($data) || !$config->getByReference() || $form->getData() !== $this->propertyAccessor->getValue($data, $propertyPath)) {
+                if (!\is_object($data) || !$config->getByReference() || $form->getData() !== $this->propertyAccessor->getValue($data, $propertyPath)) {
                     $this->propertyAccessor->setValue($data, $propertyPath, $form->getData());
                 }
             }
diff --git a/src/Symfony/Component/Form/Extension/Core/DataMapper/RadioListMapper.php b/src/Symfony/Component/Form/Extension/Core/DataMapper/RadioListMapper.php
index 6f757c601f9b..d2ec810f70c4 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataMapper/RadioListMapper.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataMapper/RadioListMapper.php
@@ -30,7 +30,7 @@ class RadioListMapper implements DataMapperInterface
      */
     public function mapDataToForms($choice, $radios)
     {
-        if (!is_string($choice)) {
+        if (!\is_string($choice)) {
             throw new UnexpectedTypeException($choice, 'string');
         }
 
@@ -45,7 +45,7 @@ public function mapDataToForms($choice, $radios)
      */
     public function mapFormsToData($radios, &$choice)
     {
-        if (null !== $choice && !is_string($choice)) {
+        if (null !== $choice && !\is_string($choice)) {
             throw new UnexpectedTypeException($choice, 'null or string');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ArrayToPartsTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ArrayToPartsTransformer.php
index 6929fb886705..53d4deddd379 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ArrayToPartsTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ArrayToPartsTransformer.php
@@ -32,7 +32,7 @@ public function transform($array)
             $array = array();
         }
 
-        if (!is_array($array)) {
+        if (!\is_array($array)) {
             throw new TransformationFailedException('Expected an array.');
         }
 
@@ -51,7 +51,7 @@ public function transform($array)
 
     public function reverseTransform($array)
     {
-        if (!is_array($array)) {
+        if (!\is_array($array)) {
             throw new TransformationFailedException('Expected an array.');
         }
 
@@ -70,8 +70,8 @@ public function reverseTransform($array)
             }
         }
 
-        if (count($emptyKeys) > 0) {
-            if (count($emptyKeys) === count($this->partMapping)) {
+        if (\count($emptyKeys) > 0) {
+            if (\count($emptyKeys) === \count($this->partMapping)) {
                 // All parts empty
                 return;
             }
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/BaseDateTimeTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/BaseDateTimeTransformer.php
index 44fa3d811987..46265828f233 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/BaseDateTimeTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/BaseDateTimeTransformer.php
@@ -38,11 +38,11 @@ abstract class BaseDateTimeTransformer implements DataTransformerInterface
      */
     public function __construct($inputTimezone = null, $outputTimezone = null)
     {
-        if (null !== $inputTimezone && !is_string($inputTimezone)) {
+        if (null !== $inputTimezone && !\is_string($inputTimezone)) {
             throw new UnexpectedTypeException($inputTimezone, 'string');
         }
 
-        if (null !== $outputTimezone && !is_string($outputTimezone)) {
+        if (null !== $outputTimezone && !\is_string($outputTimezone)) {
             throw new UnexpectedTypeException($outputTimezone, 'string');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/BooleanToStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/BooleanToStringTransformer.php
index 592d90862f06..b56a9cd0bb6c 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/BooleanToStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/BooleanToStringTransformer.php
@@ -47,7 +47,7 @@ public function transform($value)
             return;
         }
 
-        if (!is_bool($value)) {
+        if (!\is_bool($value)) {
             throw new TransformationFailedException('Expected a Boolean.');
         }
 
@@ -69,7 +69,7 @@ public function reverseTransform($value)
             return false;
         }
 
-        if (!is_string($value)) {
+        if (!\is_string($value)) {
             throw new TransformationFailedException('Expected a string.');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToBooleanArrayTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToBooleanArrayTransformer.php
index 21a8711ca29b..bca7e480c2b5 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToBooleanArrayTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToBooleanArrayTransformer.php
@@ -69,7 +69,7 @@ public function transform($choice)
         }
 
         if ($this->placeholderPresent) {
-            $values['placeholder'] = 0 === count($valueMap);
+            $values['placeholder'] = 0 === \count($valueMap);
         }
 
         return $values;
@@ -91,7 +91,7 @@ public function transform($choice)
      */
     public function reverseTransform($values)
     {
-        if (!is_array($values)) {
+        if (!\is_array($values)) {
             throw new TransformationFailedException('Expected an array.');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToValueTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToValueTransformer.php
index e8424b92994a..3353afe57c7c 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToValueTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToValueTransformer.php
@@ -34,13 +34,13 @@ public function transform($choice)
 
     public function reverseTransform($value)
     {
-        if (null !== $value && !is_string($value)) {
+        if (null !== $value && !\is_string($value)) {
             throw new TransformationFailedException('Expected a string or null.');
         }
 
         $choices = $this->choiceList->getChoicesForValues(array((string) $value));
 
-        if (1 !== count($choices)) {
+        if (1 !== \count($choices)) {
             if (null === $value || '' === $value) {
                 return;
             }
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToBooleanArrayTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToBooleanArrayTransformer.php
index b090ce3c4a49..8c6360f22e97 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToBooleanArrayTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToBooleanArrayTransformer.php
@@ -53,7 +53,7 @@ public function transform($array)
             return array();
         }
 
-        if (!is_array($array)) {
+        if (!\is_array($array)) {
             throw new TransformationFailedException('Expected an array.');
         }
 
@@ -90,7 +90,7 @@ public function transform($array)
      */
     public function reverseTransform($values)
     {
-        if (!is_array($values)) {
+        if (!\is_array($values)) {
             throw new TransformationFailedException('Expected an array.');
         }
 
@@ -113,7 +113,7 @@ public function reverseTransform($values)
             }
         }
 
-        if (count($unknown) > 0) {
+        if (\count($unknown) > 0) {
             throw new TransformationFailedException(sprintf('The choices "%s" were not found', implode('", "', $unknown)));
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToValuesTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToValuesTransformer.php
index a6b2f3fd58ce..e0b7bef1aece 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToValuesTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToValuesTransformer.php
@@ -38,7 +38,7 @@ public function transform($array)
             return array();
         }
 
-        if (!is_array($array)) {
+        if (!\is_array($array)) {
             throw new TransformationFailedException('Expected an array.');
         }
 
@@ -58,13 +58,13 @@ public function reverseTransform($array)
             return array();
         }
 
-        if (!is_array($array)) {
+        if (!\is_array($array)) {
             throw new TransformationFailedException('Expected an array.');
         }
 
         $choices = $this->choiceList->getChoicesForValues($array);
 
-        if (count($choices) !== count($array)) {
+        if (\count($choices) !== \count($array)) {
             throw new TransformationFailedException('Could not find all matching choices for the given values');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DataTransformerChain.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DataTransformerChain.php
index 81ffc7e24762..72d1586d499d 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DataTransformerChain.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DataTransformerChain.php
@@ -73,7 +73,7 @@ public function transform($value)
      */
     public function reverseTransform($value)
     {
-        for ($i = count($this->transformers) - 1; $i >= 0; --$i) {
+        for ($i = \count($this->transformers) - 1; $i >= 0; --$i) {
             $value = $this->transformers[$i]->reverseTransform($value);
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToArrayTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToArrayTransformer.php
index af8bb836da4d..aeb6abb42d14 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToArrayTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToArrayTransformer.php
@@ -118,7 +118,7 @@ public function reverseTransform($value)
             return;
         }
 
-        if (!is_array($value)) {
+        if (!\is_array($value)) {
             throw new TransformationFailedException('Expected an array.');
         }
 
@@ -134,7 +134,7 @@ public function reverseTransform($value)
             }
         }
 
-        if (count($emptyFields) > 0) {
+        if (\count($emptyFields) > 0) {
             throw new TransformationFailedException(
                 sprintf('The fields "%s" should not be empty', implode('", "', $emptyFields)
             ));
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformer.php
index 816e6cad9282..16c30bf0fe01 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformer.php
@@ -51,11 +51,11 @@ public function __construct($inputTimezone = null, $outputTimezone = null, $date
             $timeFormat = \IntlDateFormatter::SHORT;
         }
 
-        if (!in_array($dateFormat, self::$formats, true)) {
+        if (!\in_array($dateFormat, self::$formats, true)) {
             throw new UnexpectedTypeException($dateFormat, implode('", "', self::$formats));
         }
 
-        if (!in_array($timeFormat, self::$formats, true)) {
+        if (!\in_array($timeFormat, self::$formats, true)) {
             throw new UnexpectedTypeException($timeFormat, implode('", "', self::$formats));
         }
 
@@ -107,7 +107,7 @@ public function transform($dateTime)
      */
     public function reverseTransform($value)
     {
-        if (!is_string($value)) {
+        if (!\is_string($value)) {
             throw new TransformationFailedException('Expected a string.');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToRfc3339Transformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToRfc3339Transformer.php
index 25bb1a52c95d..7e72f9a11d87 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToRfc3339Transformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToRfc3339Transformer.php
@@ -61,7 +61,7 @@ public function transform($dateTime)
      */
     public function reverseTransform($rfc3339)
     {
-        if (!is_string($rfc3339)) {
+        if (!\is_string($rfc3339)) {
             throw new TransformationFailedException('Expected a string.');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToStringTransformer.php
index daeee5cce779..cb274603155d 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToStringTransformer.php
@@ -116,7 +116,7 @@ public function reverseTransform($value)
             return;
         }
 
-        if (!is_string($value)) {
+        if (!\is_string($value)) {
             throw new TransformationFailedException('Expected a string.');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
index 596f604b7950..2d166324abf7 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
@@ -162,7 +162,7 @@ public function transform($value)
      */
     public function reverseTransform($value)
     {
-        if (!is_string($value)) {
+        if (!\is_string($value)) {
             throw new TransformationFailedException('Expected a string.');
         }
 
@@ -205,7 +205,7 @@ public function reverseTransform($value)
             throw new TransformationFailedException('I don\'t have a clear idea what infinity looks like');
         }
 
-        if (is_int($result) && $result === (int) $float = (float) $result) {
+        if (\is_int($result) && $result === (int) $float = (float) $result) {
             $result = $float;
         }
 
@@ -213,7 +213,7 @@ public function reverseTransform($value)
             $length = mb_strlen($value, $encoding);
             $remainder = mb_substr($value, $position, $length, $encoding);
         } else {
-            $length = strlen($value);
+            $length = \strlen($value);
             $remainder = substr($value, $position, $length);
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/PercentToLocalizedStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/PercentToLocalizedStringTransformer.php
index b843aa1823bd..170c2b3d1123 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/PercentToLocalizedStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/PercentToLocalizedStringTransformer.php
@@ -52,7 +52,7 @@ public function __construct($scale = null, $type = null)
             $type = self::FRACTIONAL;
         }
 
-        if (!in_array($type, self::$types, true)) {
+        if (!\in_array($type, self::$types, true)) {
             throw new UnexpectedTypeException($type, implode('", "', self::$types));
         }
 
@@ -107,7 +107,7 @@ public function transform($value)
      */
     public function reverseTransform($value)
     {
-        if (!is_string($value)) {
+        if (!\is_string($value)) {
             throw new TransformationFailedException('Expected a string.');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php
index 5b851af7dd88..c9adb0ad5a6f 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php
@@ -54,7 +54,7 @@ public function transform($value)
      */
     public function reverseTransform($array)
     {
-        if (!is_array($array)) {
+        if (!\is_array($array)) {
             throw new TransformationFailedException('Expected an array.');
         }
 
@@ -73,8 +73,8 @@ public function reverseTransform($array)
             }
         }
 
-        if (count($emptyKeys) > 0) {
-            if (count($emptyKeys) == count($this->keys)) {
+        if (\count($emptyKeys) > 0) {
+            if (\count($emptyKeys) == \count($this->keys)) {
                 // All keys empty
                 return;
             }
diff --git a/src/Symfony/Component/Form/Extension/Core/EventListener/FixCheckboxInputListener.php b/src/Symfony/Component/Form/Extension/Core/EventListener/FixCheckboxInputListener.php
index 6576b95f796d..5f9289280b96 100644
--- a/src/Symfony/Component/Form/Extension/Core/EventListener/FixCheckboxInputListener.php
+++ b/src/Symfony/Component/Form/Extension/Core/EventListener/FixCheckboxInputListener.php
@@ -44,7 +44,7 @@ public function preSubmit(FormEvent $event)
     {
         $data = $event->getData();
 
-        if (is_array($data)) {
+        if (\is_array($data)) {
             // Flip the submitted values for faster lookup
             // It's better to flip this array than $existingValues because
             // $submittedValues is generally smaller.
@@ -65,7 +65,7 @@ public function preSubmit(FormEvent $event)
                 }
             }
 
-            if (count($submittedValues) > 0) {
+            if (\count($submittedValues) > 0) {
                 throw new TransformationFailedException(sprintf(
                     'The following choices were not found: "%s"',
                     implode('", "', array_keys($submittedValues))
diff --git a/src/Symfony/Component/Form/Extension/Core/EventListener/FixUrlProtocolListener.php b/src/Symfony/Component/Form/Extension/Core/EventListener/FixUrlProtocolListener.php
index 9e7761705e53..45fc60d04965 100644
--- a/src/Symfony/Component/Form/Extension/Core/EventListener/FixUrlProtocolListener.php
+++ b/src/Symfony/Component/Form/Extension/Core/EventListener/FixUrlProtocolListener.php
@@ -36,7 +36,7 @@ public function onSubmit(FormEvent $event)
     {
         $data = $event->getData();
 
-        if ($this->defaultProtocol && $data && is_string($data) && !preg_match('~^[\w+.-]+://~', $data)) {
+        if ($this->defaultProtocol && $data && \is_string($data) && !preg_match('~^[\w+.-]+://~', $data)) {
             $event->setData($this->defaultProtocol.'://'.$data);
         }
     }
diff --git a/src/Symfony/Component/Form/Extension/Core/EventListener/MergeCollectionListener.php b/src/Symfony/Component/Form/Extension/Core/EventListener/MergeCollectionListener.php
index b79ca5f81295..c6af9e63857f 100644
--- a/src/Symfony/Component/Form/Extension/Core/EventListener/MergeCollectionListener.php
+++ b/src/Symfony/Component/Form/Extension/Core/EventListener/MergeCollectionListener.php
@@ -50,11 +50,11 @@ public function onSubmit(FormEvent $event)
             $data = array();
         }
 
-        if (!is_array($data) && !($data instanceof \Traversable && $data instanceof \ArrayAccess)) {
+        if (!\is_array($data) && !($data instanceof \Traversable && $data instanceof \ArrayAccess)) {
             throw new UnexpectedTypeException($data, 'array or (\Traversable and \ArrayAccess)');
         }
 
-        if (null !== $dataToMergeInto && !is_array($dataToMergeInto) && !($dataToMergeInto instanceof \Traversable && $dataToMergeInto instanceof \ArrayAccess)) {
+        if (null !== $dataToMergeInto && !\is_array($dataToMergeInto) && !($dataToMergeInto instanceof \Traversable && $dataToMergeInto instanceof \ArrayAccess)) {
             throw new UnexpectedTypeException($dataToMergeInto, 'array or (\Traversable and \ArrayAccess)');
         }
 
@@ -72,7 +72,7 @@ public function onSubmit(FormEvent $event)
             }
         } else {
             // Calculate delta
-            $itemsToAdd = is_object($data) ? clone $data : $data;
+            $itemsToAdd = \is_object($data) ? clone $data : $data;
             $itemsToDelete = array();
 
             foreach ($dataToMergeInto as $beforeKey => $beforeItem) {
diff --git a/src/Symfony/Component/Form/Extension/Core/EventListener/ResizeFormListener.php b/src/Symfony/Component/Form/Extension/Core/EventListener/ResizeFormListener.php
index 6efcda8fd8f9..b16a74e2364c 100644
--- a/src/Symfony/Component/Form/Extension/Core/EventListener/ResizeFormListener.php
+++ b/src/Symfony/Component/Form/Extension/Core/EventListener/ResizeFormListener.php
@@ -66,7 +66,7 @@ public function preSetData(FormEvent $event)
             $data = array();
         }
 
-        if (!is_array($data) && !($data instanceof \Traversable && $data instanceof \ArrayAccess)) {
+        if (!\is_array($data) && !($data instanceof \Traversable && $data instanceof \ArrayAccess)) {
             throw new UnexpectedTypeException($data, 'array or (\Traversable and \ArrayAccess)');
         }
 
@@ -88,7 +88,7 @@ public function preSubmit(FormEvent $event)
         $form = $event->getForm();
         $data = $event->getData();
 
-        if (!is_array($data) && !($data instanceof \Traversable && $data instanceof \ArrayAccess)) {
+        if (!\is_array($data) && !($data instanceof \Traversable && $data instanceof \ArrayAccess)) {
             $data = array();
         }
 
@@ -126,7 +126,7 @@ public function onSubmit(FormEvent $event)
             $data = array();
         }
 
-        if (!is_array($data) && !($data instanceof \Traversable && $data instanceof \ArrayAccess)) {
+        if (!\is_array($data) && !($data instanceof \Traversable && $data instanceof \ArrayAccess)) {
             throw new UnexpectedTypeException($data, 'array or (\Traversable and \ArrayAccess)');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/EventListener/TrimListener.php b/src/Symfony/Component/Form/Extension/Core/EventListener/TrimListener.php
index 843aaf105357..4bfc83a6c07e 100644
--- a/src/Symfony/Component/Form/Extension/Core/EventListener/TrimListener.php
+++ b/src/Symfony/Component/Form/Extension/Core/EventListener/TrimListener.php
@@ -27,7 +27,7 @@ public function preSubmit(FormEvent $event)
     {
         $data = $event->getData();
 
-        if (!is_string($data)) {
+        if (!\is_string($data)) {
             return;
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/BaseType.php b/src/Symfony/Component/Form/Extension/Core/Type/BaseType.php
index b36a67f36b0f..a910fca19e6c 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/BaseType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/BaseType.php
@@ -81,9 +81,9 @@ public function buildView(FormView $view, FormInterface $form, array $options)
             if (method_exists($type, 'getBlockPrefix')) {
                 array_unshift($blockPrefixes, $type->getBlockPrefix());
             } else {
-                @trigger_error(get_class($type).': The ResolvedFormTypeInterface::getBlockPrefix() method will be added in version 3.0. You should add it to your implementation.', E_USER_DEPRECATED);
+                @trigger_error(\get_class($type).': The ResolvedFormTypeInterface::getBlockPrefix() method will be added in version 3.0. You should add it to your implementation.', E_USER_DEPRECATED);
 
-                $fqcn = get_class($type->getInnerType());
+                $fqcn = \get_class($type->getInnerType());
                 $name = $type->getName();
                 $hasCustomName = $name !== $fqcn;
 
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/ChoiceType.php b/src/Symfony/Component/Form/Extension/Core/Type/ChoiceType.php
index 92a0c075af07..7e57f66677b0 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/ChoiceType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/ChoiceType.php
@@ -74,7 +74,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
 
             // Check if the choices already contain the empty value
             // Only add the placeholder option if this is not the case
-            if (null !== $options['placeholder'] && 0 === count($options['choice_list']->getChoicesForValues(array('')))) {
+            if (null !== $options['placeholder'] && 0 === \count($options['choice_list']->getChoicesForValues(array('')))) {
                 $placeholderView = new ChoiceView(null, '', $options['placeholder']);
 
                 // "placeholder" is a reserved name
@@ -100,7 +100,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
 
                 // Convert the submitted data to a string, if scalar, before
                 // casting it to an array
-                if (!is_array($data)) {
+                if (!\is_array($data)) {
                     $data = (array) (string) $data;
                 }
 
@@ -131,7 +131,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
                 unset($unknownValues['']);
 
                 // Throw exception if unknown values were submitted
-                if (count($unknownValues) > 0) {
+                if (\count($unknownValues) > 0) {
                     throw new TransformationFailedException(sprintf(
                         'The choices "%s" do not exist in the choice list.',
                         implode('", "', array_keys($unknownValues))
@@ -161,12 +161,12 @@ public function buildForm(FormBuilderInterface $builder, array $options)
         $builder->addEventListener(FormEvents::PRE_SUBMIT, function (FormEvent $event) {
             $data = $event->getData();
 
-            if (!is_array($data)) {
+            if (!\is_array($data)) {
                 return;
             }
 
             foreach ($data as $v) {
-                if (null !== $v && !is_string($v) && !is_int($v)) {
+                if (null !== $v && !\is_string($v) && !\is_int($v)) {
                     throw new TransformationFailedException('All choices submitted must be NULL, strings or ints.');
                 }
             }
@@ -204,7 +204,7 @@ public function buildView(FormView $view, FormInterface $form, array $options)
         // avoid making the type check inside the closure.
         if ($options['multiple']) {
             $view->vars['is_selected'] = function ($choice, array $values) {
-                return in_array($choice, $values, true);
+                return \in_array($choice, $values, true);
             };
         } else {
             $view->vars['is_selected'] = function ($choice, $value) {
@@ -466,7 +466,7 @@ private function addSubForms(FormBuilderInterface $builder, array $choiceViews,
     {
         foreach ($choiceViews as $name => $choiceView) {
             // Flatten groups
-            if (is_array($choiceView)) {
+            if (\is_array($choiceView)) {
                 $this->addSubForms($builder, $choiceView, $options);
                 continue;
             }
@@ -539,7 +539,7 @@ public static function normalizeLegacyChoices($choices, $choiceLabels, &$nextKey
         $normalizedChoices = array();
 
         foreach ($choices as $choice => $choiceLabel) {
-            if (is_array($choiceLabel) || $choiceLabel instanceof \Traversable) {
+            if (\is_array($choiceLabel) || $choiceLabel instanceof \Traversable) {
                 $normalizedChoices[$choice] = self::normalizeLegacyChoices($choiceLabel, $choiceLabels, $nextKey);
                 continue;
             }
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/CollectionType.php b/src/Symfony/Component/Form/Extension/Core/Type/CollectionType.php
index f8b6d0132d8f..b127b7eb9f4e 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/CollectionType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/CollectionType.php
@@ -109,7 +109,7 @@ public function configureOptions(OptionsResolver $resolver)
             return __NAMESPACE__.'\TextType';
         };
         $entryOptions = function (Options $options) {
-            if (1 === count($options['options']) && isset($options['block_name'])) {
+            if (1 === \count($options['options']) && isset($options['block_name'])) {
                 return array();
             }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/DateTimeType.php b/src/Symfony/Component/Form/Extension/Core/Type/DateTimeType.php
index 9f9a55aa87f6..8ef17ff2479f 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/DateTimeType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/DateTimeType.php
@@ -77,12 +77,12 @@ public function buildForm(FormBuilderInterface $builder, array $options)
             $timeParts[] = 'second';
         }
 
-        $dateFormat = is_int($options['date_format']) ? $options['date_format'] : self::DEFAULT_DATE_FORMAT;
+        $dateFormat = \is_int($options['date_format']) ? $options['date_format'] : self::DEFAULT_DATE_FORMAT;
         $timeFormat = self::DEFAULT_TIME_FORMAT;
         $calendar = \IntlDateFormatter::GREGORIAN;
-        $pattern = is_string($options['format']) ? $options['format'] : null;
+        $pattern = \is_string($options['format']) ? $options['format'] : null;
 
-        if (!in_array($dateFormat, self::$acceptedFormats, true)) {
+        if (!\in_array($dateFormat, self::$acceptedFormats, true)) {
             throw new InvalidOptionsException('The "date_format" option must be one of the IntlDateFormatter constants (FULL, LONG, MEDIUM, SHORT) or a string representing a custom format.');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/DateType.php b/src/Symfony/Component/Form/Extension/Core/Type/DateType.php
index fe9f02874750..e509cc05821b 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/DateType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/DateType.php
@@ -46,12 +46,12 @@ class DateType extends AbstractType
      */
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
-        $dateFormat = is_int($options['format']) ? $options['format'] : self::DEFAULT_FORMAT;
+        $dateFormat = \is_int($options['format']) ? $options['format'] : self::DEFAULT_FORMAT;
         $timeFormat = \IntlDateFormatter::NONE;
         $calendar = \IntlDateFormatter::GREGORIAN;
-        $pattern = is_string($options['format']) ? $options['format'] : null;
+        $pattern = \is_string($options['format']) ? $options['format'] : null;
 
-        if (!in_array($dateFormat, self::$acceptedFormats, true)) {
+        if (!\in_array($dateFormat, self::$acceptedFormats, true)) {
             throw new InvalidOptionsException('The "format" option must be one of the IntlDateFormatter constants (FULL, LONG, MEDIUM, SHORT) or a string representing a custom format.');
         }
 
@@ -160,7 +160,7 @@ public function finishView(FormView $view, FormInterface $form, array $options)
             $pattern = $form->getConfig()->getAttribute('formatter')->getPattern();
 
             // remove special characters unless the format was explicitly specified
-            if (!is_string($options['format'])) {
+            if (!\is_string($options['format'])) {
                 // remove quoted strings first
                 $pattern = preg_replace('/\'[^\']+\'/', '', $pattern);
 
@@ -201,7 +201,7 @@ public function configureOptions(OptionsResolver $resolver)
                 $placeholder = $options['empty_value'];
             }
 
-            if (is_array($placeholder)) {
+            if (\is_array($placeholder)) {
                 $default = $placeholderDefault($options);
 
                 return array_merge(
@@ -218,7 +218,7 @@ public function configureOptions(OptionsResolver $resolver)
         };
 
         $choiceTranslationDomainNormalizer = function (Options $options, $choiceTranslationDomain) {
-            if (is_array($choiceTranslationDomain)) {
+            if (\is_array($choiceTranslationDomain)) {
                 $default = false;
 
                 return array_replace(
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/FileType.php b/src/Symfony/Component/Form/Extension/Core/Type/FileType.php
index a06f19537cee..95eebe52022b 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/FileType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/FileType.php
@@ -36,7 +36,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
                 $data = array();
                 $files = $event->getData();
 
-                if (!is_array($files)) {
+                if (!\is_array($files)) {
                     $files = array();
                 }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/FormType.php b/src/Symfony/Component/Form/Extension/Core/Type/FormType.php
index 5468e4675ecb..a877afcf2819 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/FormType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/FormType.php
@@ -125,7 +125,7 @@ public function configureOptions(OptionsResolver $resolver)
 
         // Derive "data_class" option from passed "data" object
         $dataClass = function (Options $options) {
-            return isset($options['data']) && is_object($options['data']) ? get_class($options['data']) : null;
+            return isset($options['data']) && \is_object($options['data']) ? \get_class($options['data']) : null;
         };
 
         // Derive "empty_data" closure from "data_class" option
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/TimeType.php b/src/Symfony/Component/Form/Extension/Core/Type/TimeType.php
index 3ea716869e6e..8d5082138e0b 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/TimeType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/TimeType.php
@@ -198,7 +198,7 @@ public function configureOptions(OptionsResolver $resolver)
                 $placeholder = $options['empty_value'];
             }
 
-            if (is_array($placeholder)) {
+            if (\is_array($placeholder)) {
                 $default = $placeholderDefault($options);
 
                 return array_merge(
@@ -215,7 +215,7 @@ public function configureOptions(OptionsResolver $resolver)
         };
 
         $choiceTranslationDomainNormalizer = function (Options $options, $choiceTranslationDomain) {
-            if (is_array($choiceTranslationDomain)) {
+            if (\is_array($choiceTranslationDomain)) {
                 $default = false;
 
                 return array_replace(
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/TimezoneType.php b/src/Symfony/Component/Form/Extension/Core/Type/TimezoneType.php
index 247f3d9ae9e9..d73a0160c5a0 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/TimezoneType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/TimezoneType.php
@@ -81,10 +81,10 @@ public static function getTimezones()
             foreach (\DateTimeZone::listIdentifiers() as $timezone) {
                 $parts = explode('/', $timezone);
 
-                if (count($parts) > 2) {
+                if (\count($parts) > 2) {
                     $region = $parts[0];
                     $name = $parts[1].' - '.$parts[2];
-                } elseif (count($parts) > 1) {
+                } elseif (\count($parts) > 1) {
                     $region = $parts[0];
                     $name = $parts[1];
                 } else {
@@ -117,10 +117,10 @@ private static function getFlippedTimezones()
             foreach (\DateTimeZone::listIdentifiers() as $timezone) {
                 $parts = explode('/', $timezone);
 
-                if (count($parts) > 2) {
+                if (\count($parts) > 2) {
                     $region = $parts[0];
                     $name = $parts[1].' - '.$parts[2];
-                } elseif (count($parts) > 1) {
+                } elseif (\count($parts) > 1) {
                     $region = $parts[0];
                     $name = $parts[1];
                 } else {
diff --git a/src/Symfony/Component/Form/Extension/Csrf/EventListener/CsrfValidationListener.php b/src/Symfony/Component/Form/Extension/Csrf/EventListener/CsrfValidationListener.php
index b5073af7595a..f28a50830d3a 100644
--- a/src/Symfony/Component/Form/Extension/Csrf/EventListener/CsrfValidationListener.php
+++ b/src/Symfony/Component/Form/Extension/Csrf/EventListener/CsrfValidationListener.php
@@ -89,7 +89,7 @@ public function preSubmit(FormEvent $event)
                 $form->addError(new FormError($errorMessage));
             }
 
-            if (is_array($data)) {
+            if (\is_array($data)) {
                 unset($data[$this->fieldName]);
                 $event->setData($data);
             }
diff --git a/src/Symfony/Component/Form/Extension/Csrf/Type/FormTypeCsrfExtension.php b/src/Symfony/Component/Form/Extension/Csrf/Type/FormTypeCsrfExtension.php
index 2c3c0664c592..84d83893330b 100644
--- a/src/Symfony/Component/Form/Extension/Csrf/Type/FormTypeCsrfExtension.php
+++ b/src/Symfony/Component/Form/Extension/Csrf/Type/FormTypeCsrfExtension.php
@@ -82,7 +82,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
             ->addEventSubscriber(new CsrfValidationListener(
                 $options['csrf_field_name'],
                 $options['csrf_token_manager'],
-                $options['csrf_token_id'] ?: ($builder->getName() ?: get_class($builder->getType()->getInnerType())),
+                $options['csrf_token_id'] ?: ($builder->getName() ?: \get_class($builder->getType()->getInnerType())),
                 $options['csrf_message'],
                 $this->translator,
                 $this->translationDomain,
@@ -102,7 +102,7 @@ public function finishView(FormView $view, FormInterface $form, array $options)
     {
         if ($options['csrf_protection'] && !$view->parent && $options['compound']) {
             $factory = $form->getConfig()->getFormFactory();
-            $tokenId = $options['csrf_token_id'] ?: ($form->getName() ?: get_class($form->getConfig()->getType()->getInnerType()));
+            $tokenId = $options['csrf_token_id'] ?: ($form->getName() ?: \get_class($form->getConfig()->getType()->getInnerType()));
             $data = (string) $options['csrf_token_manager']->getToken($tokenId);
 
             $csrfForm = $factory->createNamed($options['csrf_field_name'], 'Symfony\Component\Form\Extension\Core\Type\HiddenType', $data, array(
diff --git a/src/Symfony/Component/Form/Extension/DataCollector/FormDataCollector.php b/src/Symfony/Component/Form/Extension/DataCollector/FormDataCollector.php
index 8e7a3c61f55e..c955efc3df6e 100644
--- a/src/Symfony/Component/Form/Extension/DataCollector/FormDataCollector.php
+++ b/src/Symfony/Component/Form/Extension/DataCollector/FormDataCollector.php
@@ -147,7 +147,7 @@ public function collectSubmittedData(FormInterface $form)
 
         // Count errors
         if (isset($this->dataByForm[$hash]['errors'])) {
-            $this->data['nb_errors'] += count($this->dataByForm[$hash]['errors']);
+            $this->data['nb_errors'] += \count($this->dataByForm[$hash]['errors']);
         }
 
         foreach ($form as $child) {
diff --git a/src/Symfony/Component/Form/Extension/DataCollector/FormDataExtractor.php b/src/Symfony/Component/Form/Extension/DataCollector/FormDataExtractor.php
index 3e2ffd04f9f3..aa625806672b 100644
--- a/src/Symfony/Component/Form/Extension/DataCollector/FormDataExtractor.php
+++ b/src/Symfony/Component/Form/Extension/DataCollector/FormDataExtractor.php
@@ -39,7 +39,7 @@ public function extractConfiguration(FormInterface $form)
             'id' => $this->buildId($form),
             'name' => $form->getName(),
             'type' => $form->getConfig()->getType()->getName(),
-            'type_class' => get_class($form->getConfig()->getType()->getInnerType()),
+            'type_class' => \get_class($form->getConfig()->getType()->getInnerType()),
             'synchronized' => $this->valueExporter->exportValue($form->isSynchronized()),
             'passed_options' => array(),
             'resolved_options' => array(),
@@ -105,7 +105,7 @@ public function extractSubmittedData(FormInterface $form)
         foreach ($form->getErrors() as $error) {
             $errorData = array(
                 'message' => $error->getMessage(),
-                'origin' => is_object($error->getOrigin())
+                'origin' => \is_object($error->getOrigin())
                     ? spl_object_hash($error->getOrigin())
                     : null,
                 'trace' => array(),
@@ -116,7 +116,7 @@ public function extractSubmittedData(FormInterface $form)
             while (null !== $cause) {
                 if ($cause instanceof ConstraintViolationInterface) {
                     $errorData['trace'][] = array(
-                        'class' => $this->valueExporter->exportValue(get_class($cause)),
+                        'class' => $this->valueExporter->exportValue(\get_class($cause)),
                         'root' => $this->valueExporter->exportValue($cause->getRoot()),
                         'path' => $this->valueExporter->exportValue($cause->getPropertyPath()),
                         'value' => $this->valueExporter->exportValue($cause->getInvalidValue()),
@@ -129,7 +129,7 @@ public function extractSubmittedData(FormInterface $form)
 
                 if ($cause instanceof \Exception) {
                     $errorData['trace'][] = array(
-                        'class' => $this->valueExporter->exportValue(get_class($cause)),
+                        'class' => $this->valueExporter->exportValue(\get_class($cause)),
                         'message' => $this->valueExporter->exportValue($cause->getMessage()),
                     );
 
diff --git a/src/Symfony/Component/Form/Extension/DependencyInjection/DependencyInjectionExtension.php b/src/Symfony/Component/Form/Extension/DependencyInjection/DependencyInjectionExtension.php
index c0a56d063159..3171096bf79a 100644
--- a/src/Symfony/Component/Form/Extension/DependencyInjection/DependencyInjectionExtension.php
+++ b/src/Symfony/Component/Form/Extension/DependencyInjection/DependencyInjectionExtension.php
@@ -42,7 +42,7 @@ public function getType($name)
         $type = $this->container->get($this->typeServiceIds[$name]);
 
         // BC: validate result of getName() for legacy names (non-FQCN)
-        if ($name !== get_class($type) && $type->getName() !== $name) {
+        if ($name !== \get_class($type) && $type->getName() !== $name) {
             throw new InvalidArgumentException(
                 sprintf('The type name specified for the service "%s" does not match the actual name. Expected "%s", given "%s"',
                     $this->typeServiceIds[$name],
@@ -99,7 +99,7 @@ public function getTypeGuesser()
                 $guessers[] = $this->container->get($serviceId);
             }
 
-            if (count($guessers) > 0) {
+            if (\count($guessers) > 0) {
                 $this->guesser = new FormTypeGuesserChain($guessers);
             }
         }
diff --git a/src/Symfony/Component/Form/Extension/HttpFoundation/EventListener/BindRequestListener.php b/src/Symfony/Component/Form/Extension/HttpFoundation/EventListener/BindRequestListener.php
index 730ff9221658..c2533c66317b 100644
--- a/src/Symfony/Component/Form/Extension/HttpFoundation/EventListener/BindRequestListener.php
+++ b/src/Symfony/Component/Form/Extension/HttpFoundation/EventListener/BindRequestListener.php
@@ -69,7 +69,7 @@ public function preBind(FormEvent $event)
                     $files = $request->files->get($name, $default);
                 }
 
-                if (is_array($params) && is_array($files)) {
+                if (\is_array($params) && \is_array($files)) {
                     $data = array_replace_recursive($params, $files);
                 } else {
                     $data = $params ?: $files;
diff --git a/src/Symfony/Component/Form/Extension/HttpFoundation/HttpFoundationRequestHandler.php b/src/Symfony/Component/Form/Extension/HttpFoundation/HttpFoundationRequestHandler.php
index 571db0eb41df..0a1297d3ab21 100644
--- a/src/Symfony/Component/Form/Extension/HttpFoundation/HttpFoundationRequestHandler.php
+++ b/src/Symfony/Component/Form/Extension/HttpFoundation/HttpFoundationRequestHandler.php
@@ -73,7 +73,7 @@ public function handleRequest(FormInterface $form, $request = null)
                 $form->submit(null, false);
 
                 $form->addError(new FormError(
-                    call_user_func($form->getConfig()->getOption('upload_max_size_message')),
+                    \call_user_func($form->getConfig()->getOption('upload_max_size_message')),
                     null,
                     array('{{ max }}' => $this->serverParams->getNormalizedIniPostMaxSize())
                 ));
@@ -93,7 +93,7 @@ public function handleRequest(FormInterface $form, $request = null)
                 return;
             }
 
-            if (is_array($params) && is_array($files)) {
+            if (\is_array($params) && \is_array($files)) {
                 $data = array_replace_recursive($params, $files);
             } else {
                 $data = $params ?: $files;
@@ -101,7 +101,7 @@ public function handleRequest(FormInterface $form, $request = null)
         }
 
         // Don't auto-submit the form unless at least one field is present.
-        if ('' === $name && count(array_intersect_key($data, $form->all())) <= 0) {
+        if ('' === $name && \count(array_intersect_key($data, $form->all())) <= 0) {
             return;
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Templating/TemplatingRendererEngine.php b/src/Symfony/Component/Form/Extension/Templating/TemplatingRendererEngine.php
index 8e2ffa514d85..e280423e6f87 100644
--- a/src/Symfony/Component/Form/Extension/Templating/TemplatingRendererEngine.php
+++ b/src/Symfony/Component/Form/Extension/Templating/TemplatingRendererEngine.php
@@ -60,7 +60,7 @@ protected function loadResourceForBlockName($cacheKey, FormView $view, $blockNam
 
         // Check each theme whether it contains the searched block
         if (isset($this->themes[$cacheKey])) {
-            for ($i = count($this->themes[$cacheKey]) - 1; $i >= 0; --$i) {
+            for ($i = \count($this->themes[$cacheKey]) - 1; $i >= 0; --$i) {
                 if ($this->loadResourceFromTheme($cacheKey, $blockName, $this->themes[$cacheKey][$i])) {
                     return true;
                 }
@@ -69,7 +69,7 @@ protected function loadResourceForBlockName($cacheKey, FormView $view, $blockNam
 
         // Check the default themes once we reach the root form without success
         if (!$view->parent) {
-            for ($i = count($this->defaultThemes) - 1; $i >= 0; --$i) {
+            for ($i = \count($this->defaultThemes) - 1; $i >= 0; --$i) {
                 if ($this->loadResourceFromTheme($cacheKey, $blockName, $this->defaultThemes[$i])) {
                     return true;
                 }
diff --git a/src/Symfony/Component/Form/Extension/Validator/Constraints/FormValidator.php b/src/Symfony/Component/Form/Extension/Validator/Constraints/FormValidator.php
index df533d5d3e9b..21551f36bbde 100644
--- a/src/Symfony/Component/Form/Extension/Validator/Constraints/FormValidator.php
+++ b/src/Symfony/Component/Form/Extension/Validator/Constraints/FormValidator.php
@@ -52,7 +52,7 @@ public function validate($form, Constraint $constraint)
             // Validate the data against its own constraints
             if (self::allowDataWalking($form)) {
                 if ($validator) {
-                    if (is_array($groups) && count($groups) > 0 || $groups instanceof GroupSequence && count($groups->groups) > 0) {
+                    if (\is_array($groups) && \count($groups) > 0 || $groups instanceof GroupSequence && \count($groups->groups) > 0) {
                         $validator->atPath('data')->validate($form->getData(), null, $groups);
                     }
                 } else {
@@ -74,12 +74,12 @@ public function validate($form, Constraint $constraint)
                     // 2.4 API
                     foreach ($groups as $group) {
                         foreach ($constraints as $constraint) {
-                            if (in_array($group, $constraint->groups)) {
+                            if (\in_array($group, $constraint->groups)) {
                                 $this->context->validateValue($form->getData(), $constraint, 'data', $group);
                             }
                         }
 
-                        if (count($this->context->getViolations()) > 0) {
+                        if (\count($this->context->getViolations()) > 0) {
                             break;
                         }
                     }
@@ -101,7 +101,7 @@ public function validate($form, Constraint $constraint)
                     // Otherwise validate a constraint only once for the first
                     // matching group
                     foreach ($groups as $group) {
-                        if (in_array($group, $constraint->groups)) {
+                        if (\in_array($group, $constraint->groups)) {
                             if ($validator) {
                                 $validator->atPath('data')->validate($form->getData(), $constraint, $group);
                             } else {
@@ -136,7 +136,7 @@ public function validate($form, Constraint $constraint)
             if ($childrenSynchronized) {
                 $clientDataAsString = is_scalar($form->getViewData())
                     ? (string) $form->getViewData()
-                    : gettype($form->getViewData());
+                    : \gettype($form->getViewData());
 
                 if ($this->context instanceof ExecutionContextInterface) {
                     $this->context->setConstraint($constraint);
@@ -158,7 +158,7 @@ public function validate($form, Constraint $constraint)
         }
 
         // Mark the form with an error if it contains extra fields
-        if (!$config->getOption('allow_extra_fields') && count($form->getExtraData()) > 0) {
+        if (!$config->getOption('allow_extra_fields') && \count($form->getExtraData()) > 0) {
             if ($this->context instanceof ExecutionContextInterface) {
                 $this->context->setConstraint($constraint);
                 $this->context->buildViolation($config->getOption('extra_fields_message'))
@@ -188,7 +188,7 @@ private static function allowDataWalking(FormInterface $form)
         $data = $form->getData();
 
         // Scalar values cannot have mapped constraints
-        if (!is_object($data) && !is_array($data)) {
+        if (!\is_object($data) && !\is_array($data)) {
             return false;
         }
 
@@ -253,8 +253,8 @@ private static function getValidationGroups(FormInterface $form)
      */
     private static function resolveValidationGroups($groups, FormInterface $form)
     {
-        if (!is_string($groups) && is_callable($groups)) {
-            $groups = call_user_func($groups, $form);
+        if (!\is_string($groups) && \is_callable($groups)) {
+            $groups = \call_user_func($groups, $form);
         }
 
         if ($groups instanceof GroupSequence) {
diff --git a/src/Symfony/Component/Form/Extension/Validator/Type/BaseValidatorExtension.php b/src/Symfony/Component/Form/Extension/Validator/Type/BaseValidatorExtension.php
index 4f52003c0d09..431bf5ecfb6c 100644
--- a/src/Symfony/Component/Form/Extension/Validator/Type/BaseValidatorExtension.php
+++ b/src/Symfony/Component/Form/Extension/Validator/Type/BaseValidatorExtension.php
@@ -39,7 +39,7 @@ public function configureOptions(OptionsResolver $resolver)
                 return;
             }
 
-            if (is_callable($groups)) {
+            if (\is_callable($groups)) {
                 return $groups;
             }
 
diff --git a/src/Symfony/Component/Form/Extension/Validator/Type/FormTypeValidatorExtension.php b/src/Symfony/Component/Form/Extension/Validator/Type/FormTypeValidatorExtension.php
index 7ec363e9a7d9..5657970031db 100644
--- a/src/Symfony/Component/Form/Extension/Validator/Type/FormTypeValidatorExtension.php
+++ b/src/Symfony/Component/Form/Extension/Validator/Type/FormTypeValidatorExtension.php
@@ -57,7 +57,7 @@ public function configureOptions(OptionsResolver $resolver)
 
         // Constraint should always be converted to an array
         $constraintsNormalizer = function (Options $options, $constraints) {
-            return is_object($constraints) ? array($constraints) : (array) $constraints;
+            return \is_object($constraints) ? array($constraints) : (array) $constraints;
         };
 
         $cascadeValidationNormalizer = function (Options $options, $cascadeValidation) {
diff --git a/src/Symfony/Component/Form/Extension/Validator/Type/UploadValidatorExtension.php b/src/Symfony/Component/Form/Extension/Validator/Type/UploadValidatorExtension.php
index 6f1f632118c8..0147afcac232 100644
--- a/src/Symfony/Component/Form/Extension/Validator/Type/UploadValidatorExtension.php
+++ b/src/Symfony/Component/Form/Extension/Validator/Type/UploadValidatorExtension.php
@@ -44,7 +44,7 @@ public function configureOptions(OptionsResolver $resolver)
         $translationDomain = $this->translationDomain;
         $resolver->setNormalizer('upload_max_size_message', function (Options $options, $message) use ($translator, $translationDomain) {
             return function () use ($translator, $translationDomain, $message) {
-                return $translator->trans(call_user_func($message), array(), $translationDomain);
+                return $translator->trans(\call_user_func($message), array(), $translationDomain);
             };
         });
     }
diff --git a/src/Symfony/Component/Form/Extension/Validator/ValidatorTypeGuesser.php b/src/Symfony/Component/Form/Extension/Validator/ValidatorTypeGuesser.php
index 0881983e730e..23df9fff01ea 100644
--- a/src/Symfony/Component/Form/Extension/Validator/ValidatorTypeGuesser.php
+++ b/src/Symfony/Component/Form/Extension/Validator/ValidatorTypeGuesser.php
@@ -85,7 +85,7 @@ public function guessPattern($class, $property)
      */
     public function guessTypeForConstraint(Constraint $constraint)
     {
-        switch (get_class($constraint)) {
+        switch (\get_class($constraint)) {
             case 'Symfony\Component\Validator\Constraints\Type':
                 switch ($constraint->type) {
                     case 'array':
@@ -172,7 +172,7 @@ public function guessTypeForConstraint(Constraint $constraint)
      */
     public function guessRequiredForConstraint(Constraint $constraint)
     {
-        switch (get_class($constraint)) {
+        switch (\get_class($constraint)) {
             case 'Symfony\Component\Validator\Constraints\NotNull':
             case 'Symfony\Component\Validator\Constraints\NotBlank':
             case 'Symfony\Component\Validator\Constraints\True':
@@ -188,7 +188,7 @@ public function guessRequiredForConstraint(Constraint $constraint)
      */
     public function guessMaxLengthForConstraint(Constraint $constraint)
     {
-        switch (get_class($constraint)) {
+        switch (\get_class($constraint)) {
             case 'Symfony\Component\Validator\Constraints\Length':
                 if (is_numeric($constraint->max)) {
                     return new ValueGuess($constraint->max, Guess::HIGH_CONFIDENCE);
@@ -196,14 +196,14 @@ public function guessMaxLengthForConstraint(Constraint $constraint)
                 break;
 
             case 'Symfony\Component\Validator\Constraints\Type':
-                if (in_array($constraint->type, array('double', 'float', 'numeric', 'real'))) {
+                if (\in_array($constraint->type, array('double', 'float', 'numeric', 'real'))) {
                     return new ValueGuess(null, Guess::MEDIUM_CONFIDENCE);
                 }
                 break;
 
             case 'Symfony\Component\Validator\Constraints\Range':
                 if (is_numeric($constraint->max)) {
-                    return new ValueGuess(strlen((string) $constraint->max), Guess::LOW_CONFIDENCE);
+                    return new ValueGuess(\strlen((string) $constraint->max), Guess::LOW_CONFIDENCE);
                 }
                 break;
         }
@@ -216,7 +216,7 @@ public function guessMaxLengthForConstraint(Constraint $constraint)
      */
     public function guessPatternForConstraint(Constraint $constraint)
     {
-        switch (get_class($constraint)) {
+        switch (\get_class($constraint)) {
             case 'Symfony\Component\Validator\Constraints\Length':
                 if (is_numeric($constraint->min)) {
                     return new ValueGuess(sprintf('.{%s,}', (string) $constraint->min), Guess::LOW_CONFIDENCE);
@@ -233,12 +233,12 @@ public function guessPatternForConstraint(Constraint $constraint)
 
             case 'Symfony\Component\Validator\Constraints\Range':
                 if (is_numeric($constraint->min)) {
-                    return new ValueGuess(sprintf('.{%s,}', strlen((string) $constraint->min)), Guess::LOW_CONFIDENCE);
+                    return new ValueGuess(sprintf('.{%s,}', \strlen((string) $constraint->min)), Guess::LOW_CONFIDENCE);
                 }
                 break;
 
             case 'Symfony\Component\Validator\Constraints\Type':
-                if (in_array($constraint->type, array('double', 'float', 'numeric', 'real'))) {
+                if (\in_array($constraint->type, array('double', 'float', 'numeric', 'real'))) {
                     return new ValueGuess(null, Guess::MEDIUM_CONFIDENCE);
                 }
                 break;
diff --git a/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/MappingRule.php b/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/MappingRule.php
index 1fac736e8c9e..e286eb56fd33 100644
--- a/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/MappingRule.php
+++ b/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/MappingRule.php
@@ -69,7 +69,7 @@ public function match($propertyPath)
      */
     public function isPrefix($propertyPath)
     {
-        $length = strlen($propertyPath);
+        $length = \strlen($propertyPath);
         $prefix = substr($this->propertyPath, 0, $length);
         $next = isset($this->propertyPath[$length]) ? $this->propertyPath[$length] : null;
 
diff --git a/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationMapper.php b/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationMapper.php
index 8a3602e701c3..1aca2c8077ce 100644
--- a/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationMapper.php
+++ b/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationMapper.php
@@ -48,7 +48,7 @@ public function mapViolation(ConstraintViolation $violation, FormInterface $form
         $match = false;
 
         // Don't create a ViolationPath instance for empty property paths
-        if (strlen($violation->getPropertyPath()) > 0) {
+        if (\strlen($violation->getPropertyPath()) > 0) {
             $violationPath = new ViolationPath($violation->getPropertyPath());
             $relativePath = $this->reconstructPath($violationPath, $form);
         }
diff --git a/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationPath.php b/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationPath.php
index 007968ab4c24..805150f2d1d0 100644
--- a/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationPath.php
+++ b/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationPath.php
@@ -56,7 +56,7 @@ public function __construct($violationPath)
         $elements = $path->getElements();
         $data = false;
 
-        for ($i = 0, $l = count($elements); $i < $l; ++$i) {
+        for ($i = 0, $l = \count($elements); $i < $l; ++$i) {
             if (!$data) {
                 // The element "data" has not yet been passed
                 if ('children' === $elements[$i] && $path->isProperty($i)) {
@@ -107,7 +107,7 @@ public function __construct($violationPath)
             }
         }
 
-        $this->length = count($this->elements);
+        $this->length = \count($this->elements);
 
         $this->buildString();
     }
diff --git a/src/Symfony/Component/Form/Form.php b/src/Symfony/Component/Form/Form.php
index 0235ae9e6005..b9a2a1be59d7 100644
--- a/src/Symfony/Component/Form/Form.php
+++ b/src/Symfony/Component/Form/Form.php
@@ -323,7 +323,7 @@ public function setData($modelData)
             return $this;
         }
 
-        if (is_object($modelData) && !$this->config->getByReference()) {
+        if (\is_object($modelData) && !$this->config->getByReference()) {
             $modelData = clone $modelData;
         }
 
@@ -355,9 +355,9 @@ public function setData($modelData)
             $dataClass = $this->config->getDataClass();
 
             if (null !== $dataClass && !$viewData instanceof $dataClass) {
-                $actualType = is_object($viewData)
-                    ? 'an instance of class '.get_class($viewData)
-                    : 'a(n) '.gettype($viewData);
+                $actualType = \is_object($viewData)
+                    ? 'an instance of class '.\get_class($viewData)
+                    : 'a(n) '.\gettype($viewData);
 
                 throw new LogicException(
                     'The form\'s view data is expected to be an instance of class '.
@@ -377,7 +377,7 @@ public function setData($modelData)
 
         // It is not necessary to invoke this method if the form doesn't have children,
         // even if the form is compound.
-        if (count($this->children) > 0) {
+        if (\count($this->children) > 0) {
             // Update child forms from the data
             $iterator = new InheritDataAwareIterator($this->children);
             $iterator = new \RecursiveIteratorIterator($iterator);
@@ -566,7 +566,7 @@ public function submit($submittedData, $clearMissing = true)
                     $submittedData = array();
                 }
 
-                if (!is_array($submittedData)) {
+                if (!\is_array($submittedData)) {
                     throw new TransformationFailedException('Compound forms expect an array or NULL on submission.');
                 }
 
@@ -623,7 +623,7 @@ public function submit($submittedData, $clearMissing = true)
                 // Merge form data from children into existing view data
                 // It is not necessary to invoke this method if the form has no children,
                 // even if it is compound.
-                if (count($this->children) > 0) {
+                if (\count($this->children) > 0) {
                     // Use InheritDataAwareIterator to process children of
                     // descendants that inherit this form's data.
                     // These descendants will not be submitted normally (see the check
@@ -758,7 +758,7 @@ public function isEmpty()
 
         return FormUtil::isEmpty($this->modelData) ||
             // arrays, countables
-            ((is_array($this->modelData) || $this->modelData instanceof \Countable) && 0 === count($this->modelData)) ||
+            ((\is_array($this->modelData) || $this->modelData instanceof \Countable) && 0 === \count($this->modelData)) ||
             // traversables that are not countable
             ($this->modelData instanceof \Traversable && 0 === iterator_count($this->modelData));
     }
@@ -776,7 +776,7 @@ public function isValid()
             return true;
         }
 
-        return 0 === count($this->getErrors(true));
+        return 0 === \count($this->getErrors(true));
     }
 
     /**
@@ -813,7 +813,7 @@ public function getErrors($deep = false, $flatten = true)
 
                 $iterator = $child->getErrors(true, $flatten);
 
-                if (0 === count($iterator)) {
+                if (0 === \count($iterator)) {
                     continue;
                 }
 
@@ -894,11 +894,11 @@ public function add($child, $type = null, array $options = array())
         }
 
         if (!$child instanceof FormInterface) {
-            if (!is_string($child) && !is_int($child)) {
+            if (!\is_string($child) && !\is_int($child)) {
                 throw new UnexpectedTypeException($child, 'string, integer or Symfony\Component\Form\FormInterface');
             }
 
-            if (null !== $type && !is_string($type) && !$type instanceof FormTypeInterface) {
+            if (null !== $type && !\is_string($type) && !$type instanceof FormTypeInterface) {
                 throw new UnexpectedTypeException($type, 'string or Symfony\Component\Form\FormTypeInterface');
             }
 
@@ -1046,7 +1046,7 @@ public function getIterator()
      */
     public function count()
     {
-        return count($this->children);
+        return \count($this->children);
     }
 
     /**
@@ -1117,7 +1117,7 @@ private function normToModel($value)
         try {
             $transformers = $this->config->getModelTransformers();
 
-            for ($i = count($transformers) - 1; $i >= 0; --$i) {
+            for ($i = \count($transformers) - 1; $i >= 0; --$i) {
                 $value = $transformers[$i]->reverseTransform($value);
             }
         } catch (TransformationFailedException $exception) {
@@ -1184,7 +1184,7 @@ private function viewToNorm($value)
         }
 
         try {
-            for ($i = count($transformers) - 1; $i >= 0; --$i) {
+            for ($i = \count($transformers) - 1; $i >= 0; --$i) {
                 $value = $transformers[$i]->reverseTransform($value);
             }
         } catch (TransformationFailedException $exception) {
diff --git a/src/Symfony/Component/Form/FormBuilder.php b/src/Symfony/Component/Form/FormBuilder.php
index e8648ac41b17..6be9747d5f53 100644
--- a/src/Symfony/Component/Form/FormBuilder.php
+++ b/src/Symfony/Component/Form/FormBuilder.php
@@ -71,11 +71,11 @@ public function add($child, $type = null, array $options = array())
             return $this;
         }
 
-        if (!is_string($child) && !is_int($child)) {
+        if (!\is_string($child) && !\is_int($child)) {
             throw new UnexpectedTypeException($child, 'string, integer or Symfony\Component\Form\FormBuilderInterface');
         }
 
-        if (null !== $type && !is_string($type) && !$type instanceof FormTypeInterface) {
+        if (null !== $type && !\is_string($type) && !$type instanceof FormTypeInterface) {
             throw new UnexpectedTypeException($type, 'string or Symfony\Component\Form\FormTypeInterface');
         }
 
@@ -186,7 +186,7 @@ public function count()
             throw new BadMethodCallException('FormBuilder methods cannot be accessed anymore once the builder is turned into a FormConfigInterface instance.');
         }
 
-        return count($this->children);
+        return \count($this->children);
     }
 
     /**
diff --git a/src/Symfony/Component/Form/FormConfigBuilder.php b/src/Symfony/Component/Form/FormConfigBuilder.php
index 14150179d8ea..42356d852f9d 100644
--- a/src/Symfony/Component/Form/FormConfigBuilder.php
+++ b/src/Symfony/Component/Form/FormConfigBuilder.php
@@ -820,7 +820,7 @@ public function setMethod($method)
 
         $upperCaseMethod = strtoupper($method);
 
-        if (!in_array($upperCaseMethod, self::$allowedMethods)) {
+        if (!\in_array($upperCaseMethod, self::$allowedMethods)) {
             throw new InvalidArgumentException(sprintf(
                 'The form method is "%s", but should be one of "%s".',
                 $method,
@@ -887,7 +887,7 @@ public function getFormConfig()
      */
     public static function validateName($name)
     {
-        if (null !== $name && !is_string($name) && !is_int($name)) {
+        if (null !== $name && !\is_string($name) && !\is_int($name)) {
             throw new UnexpectedTypeException($name, 'string, integer or null');
         }
 
diff --git a/src/Symfony/Component/Form/FormErrorIterator.php b/src/Symfony/Component/Form/FormErrorIterator.php
index 45032e240792..605a0656ff7c 100644
--- a/src/Symfony/Component/Form/FormErrorIterator.php
+++ b/src/Symfony/Component/Form/FormErrorIterator.php
@@ -54,7 +54,7 @@ public function __construct(FormInterface $form, array $errors)
                     'The errors must be instances of '.
                     '"\Symfony\Component\Form\FormError" or "%s". Got: "%s".',
                     __CLASS__,
-                    is_object($error) ? get_class($error) : gettype($error)
+                    \is_object($error) ? \get_class($error) : \gettype($error)
                 ));
             }
         }
@@ -233,7 +233,7 @@ public function getChildren()
      */
     public function count()
     {
-        return count($this->errors);
+        return \count($this->errors);
     }
 
     /**
diff --git a/src/Symfony/Component/Form/FormFactory.php b/src/Symfony/Component/Form/FormFactory.php
index 43651a14cc12..182a32bcde37 100644
--- a/src/Symfony/Component/Form/FormFactory.php
+++ b/src/Symfony/Component/Form/FormFactory.php
@@ -60,7 +60,7 @@ public function createBuilder($type = 'Symfony\Component\Form\Extension\Core\Typ
             $typeObject = $type;
         } elseif ($type instanceof FormTypeInterface) {
             $typeObject = $type;
-        } elseif (is_string($type)) {
+        } elseif (\is_string($type)) {
             $typeObject = $this->registry->getType($type);
             $name = $type;
         } else {
@@ -94,12 +94,12 @@ public function createNamedBuilder($name, $type = 'Symfony\Component\Form\Extens
         }
 
         if ($type instanceof FormTypeInterface) {
-            @trigger_error(sprintf('Passing type instances to FormBuilder::add(), Form::add() or the FormFactory is deprecated since Symfony 2.8 and will not be supported in 3.0. Use the fully-qualified type class name instead (%s).', get_class($type)), E_USER_DEPRECATED);
+            @trigger_error(sprintf('Passing type instances to FormBuilder::add(), Form::add() or the FormFactory is deprecated since Symfony 2.8 and will not be supported in 3.0. Use the fully-qualified type class name instead (%s).', \get_class($type)), E_USER_DEPRECATED);
             $type = $this->resolveType($type);
-        } elseif (is_string($type)) {
+        } elseif (\is_string($type)) {
             $type = $this->registry->getType($type);
         } elseif ($type instanceof ResolvedFormTypeInterface) {
-            @trigger_error(sprintf('Passing type instances to FormBuilder::add(), Form::add() or the FormFactory is deprecated since Symfony 2.8 and will not be supported in 3.0. Use the fully-qualified type class name instead (%s).', get_class($type->getInnerType())), E_USER_DEPRECATED);
+            @trigger_error(sprintf('Passing type instances to FormBuilder::add(), Form::add() or the FormFactory is deprecated since Symfony 2.8 and will not be supported in 3.0. Use the fully-qualified type class name instead (%s).', \get_class($type->getInnerType())), E_USER_DEPRECATED);
         } else {
             throw new UnexpectedTypeException($type, 'string, Symfony\Component\Form\ResolvedFormTypeInterface or Symfony\Component\Form\FormTypeInterface');
         }
diff --git a/src/Symfony/Component/Form/FormFactoryBuilder.php b/src/Symfony/Component/Form/FormFactoryBuilder.php
index 64021eac7a57..9ca1b234a203 100644
--- a/src/Symfony/Component/Form/FormFactoryBuilder.php
+++ b/src/Symfony/Component/Form/FormFactoryBuilder.php
@@ -144,8 +144,8 @@ public function getFormFactory()
     {
         $extensions = $this->extensions;
 
-        if (count($this->types) > 0 || count($this->typeExtensions) > 0 || count($this->typeGuessers) > 0) {
-            if (count($this->typeGuessers) > 1) {
+        if (\count($this->types) > 0 || \count($this->typeExtensions) > 0 || \count($this->typeGuessers) > 0) {
+            if (\count($this->typeGuessers) > 1) {
                 $typeGuesser = new FormTypeGuesserChain($this->typeGuessers);
             } else {
                 $typeGuesser = isset($this->typeGuessers[0]) ? $this->typeGuessers[0] : null;
diff --git a/src/Symfony/Component/Form/FormRegistry.php b/src/Symfony/Component/Form/FormRegistry.php
index 538063e27d3d..8e911937a49b 100644
--- a/src/Symfony/Component/Form/FormRegistry.php
+++ b/src/Symfony/Component/Form/FormRegistry.php
@@ -98,7 +98,7 @@ public function getType($name)
         }
 
         if (isset($this->legacyNames[$name])) {
-            @trigger_error(sprintf('Accessing type "%s" by its string name is deprecated since Symfony 2.8 and will be removed in 3.0. Use the fully-qualified type class name "%s" instead.', $name, get_class($this->types[$name]->getInnerType())), E_USER_DEPRECATED);
+            @trigger_error(sprintf('Accessing type "%s" by its string name is deprecated since Symfony 2.8 and will be removed in 3.0. Use the fully-qualified type class name "%s" instead.', $name, \get_class($this->types[$name]->getInnerType())), E_USER_DEPRECATED);
         }
 
         return $this->types[$name];
@@ -116,7 +116,7 @@ private function resolveAndAddType(FormTypeInterface $type)
     {
         $typeExtensions = array();
         $parentType = $type->getParent();
-        $fqcn = get_class($type);
+        $fqcn = \get_class($type);
         $name = $type->getName();
         $hasCustomName = $name !== $fqcn;
 
@@ -130,7 +130,7 @@ private function resolveAndAddType(FormTypeInterface $type)
         if ($hasCustomName) {
             foreach ($this->extensions as $extension) {
                 if ($x = $extension->getTypeExtensions($name)) {
-                    @trigger_error(sprintf('Returning a type name from %s::getExtendedType() is deprecated since Symfony 2.8 and will be removed in 3.0. Return the fully-qualified type class name instead.', get_class($x[0])), E_USER_DEPRECATED);
+                    @trigger_error(sprintf('Returning a type name from %s::getExtendedType() is deprecated since Symfony 2.8 and will be removed in 3.0. Return the fully-qualified type class name instead.', \get_class($x[0])), E_USER_DEPRECATED);
 
                     $typeExtensions = array_merge($typeExtensions, $x);
                 }
@@ -165,7 +165,7 @@ private function resolveAndAddType(FormTypeInterface $type)
     public function hasType($name)
     {
         if (isset($this->legacyNames[$name])) {
-            @trigger_error(sprintf('Accessing type "%s" by its string name is deprecated since Symfony 2.8 and will be removed in 3.0. Use the fully-qualified type class name "%s" instead.', $name, get_class($this->types[$name]->getInnerType())), E_USER_DEPRECATED);
+            @trigger_error(sprintf('Accessing type "%s" by its string name is deprecated since Symfony 2.8 and will be removed in 3.0. Use the fully-qualified type class name "%s" instead.', $name, \get_class($this->types[$name]->getInnerType())), E_USER_DEPRECATED);
         }
 
         if (isset($this->types[$name])) {
diff --git a/src/Symfony/Component/Form/FormRenderer.php b/src/Symfony/Component/Form/FormRenderer.php
index 342a64d5037f..df2ccd6b6e99 100644
--- a/src/Symfony/Component/Form/FormRenderer.php
+++ b/src/Symfony/Component/Form/FormRenderer.php
@@ -185,7 +185,7 @@ public function searchAndRenderBlock(FormView $view, $blockNameSuffix, array $va
             foreach ($view->vars['block_prefixes'] as $blockNamePrefix) {
                 $blockNameHierarchy[] = $blockNamePrefix.'_'.$blockNameSuffix;
             }
-            $hierarchyLevel = count($blockNameHierarchy) - 1;
+            $hierarchyLevel = \count($blockNameHierarchy) - 1;
 
             $hierarchyInit = true;
         } else {
@@ -229,7 +229,7 @@ public function searchAndRenderBlock(FormView $view, $blockNameSuffix, array $va
 
         // Escape if no resource exists for this block
         if (!$resource) {
-            if (count($blockNameHierarchy) !== count(array_unique($blockNameHierarchy))) {
+            if (\count($blockNameHierarchy) !== \count(array_unique($blockNameHierarchy))) {
                 throw new LogicException(sprintf('Unable to render the form because the block names array contains duplicates: "%s".', implode('", "', array_reverse($blockNameHierarchy))));
             }
 
diff --git a/src/Symfony/Component/Form/FormView.php b/src/Symfony/Component/Form/FormView.php
index 21a3d5036ad2..b4c4b0580d7c 100644
--- a/src/Symfony/Component/Form/FormView.php
+++ b/src/Symfony/Component/Form/FormView.php
@@ -63,7 +63,7 @@ public function __construct(FormView $parent = null)
      */
     public function isRendered()
     {
-        if (true === $this->rendered || 0 === count($this->children)) {
+        if (true === $this->rendered || 0 === \count($this->children)) {
             return $this->rendered;
         }
 
@@ -162,6 +162,6 @@ public function getIterator()
      */
     public function count()
     {
-        return count($this->children);
+        return \count($this->children);
     }
 }
diff --git a/src/Symfony/Component/Form/NativeRequestHandler.php b/src/Symfony/Component/Form/NativeRequestHandler.php
index 37e1c99a7450..ccebdab6d80a 100644
--- a/src/Symfony/Component/Form/NativeRequestHandler.php
+++ b/src/Symfony/Component/Form/NativeRequestHandler.php
@@ -78,7 +78,7 @@ public function handleRequest(FormInterface $form, $request = null)
                 $form->submit(null, false);
 
                 $form->addError(new FormError(
-                    call_user_func($form->getConfig()->getOption('upload_max_size_message')),
+                    \call_user_func($form->getConfig()->getOption('upload_max_size_message')),
                     null,
                     array('{{ max }}' => $this->serverParams->getNormalizedIniPostMaxSize())
                 ));
@@ -103,7 +103,7 @@ public function handleRequest(FormInterface $form, $request = null)
                 return;
             }
 
-            if (is_array($params) && is_array($files)) {
+            if (\is_array($params) && \is_array($files)) {
                 $data = array_replace_recursive($params, $files);
             } else {
                 $data = $params ?: $files;
@@ -111,7 +111,7 @@ public function handleRequest(FormInterface $form, $request = null)
         }
 
         // Don't auto-submit the form unless at least one field is present.
-        if ('' === $name && count(array_intersect_key($data, $form->all())) <= 0) {
+        if ('' === $name && \count(array_intersect_key($data, $form->all())) <= 0) {
             return;
         }
 
@@ -126,7 +126,7 @@ public function isFileUpload($data)
         // POST data will always be strings or arrays of strings. Thus, we can be sure
         // that the submitted data is a file upload if the "error" value is an integer
         // (this value must have been injected by PHP itself).
-        return is_array($data) && isset($data['error']) && is_int($data['error']);
+        return \is_array($data) && isset($data['error']) && \is_int($data['error']);
     }
 
     /**
@@ -166,14 +166,14 @@ private static function getRequestMethod()
      */
     private static function fixPhpFilesArray($data)
     {
-        if (!is_array($data)) {
+        if (!\is_array($data)) {
             return $data;
         }
 
         $keys = array_keys($data);
         sort($keys);
 
-        if (self::$fileKeys !== $keys || !isset($data['name']) || !is_array($data['name'])) {
+        if (self::$fileKeys !== $keys || !isset($data['name']) || !\is_array($data['name'])) {
             return $data;
         }
 
@@ -204,7 +204,7 @@ private static function fixPhpFilesArray($data)
      */
     private static function stripEmptyFiles($data)
     {
-        if (!is_array($data)) {
+        if (!\is_array($data)) {
             return $data;
         }
 
diff --git a/src/Symfony/Component/Form/PreloadedExtension.php b/src/Symfony/Component/Form/PreloadedExtension.php
index 5b82ef97f13c..c2b999473ba3 100644
--- a/src/Symfony/Component/Form/PreloadedExtension.php
+++ b/src/Symfony/Component/Form/PreloadedExtension.php
@@ -41,7 +41,7 @@ public function __construct(array $types, array $typeExtensions, FormTypeGuesser
             $this->types[$type->getName()] = $type;
 
             // Since Symfony 2.8, types are identified by their FQCN
-            $this->types[get_class($type)] = $type;
+            $this->types[\get_class($type)] = $type;
         }
     }
 
diff --git a/src/Symfony/Component/Form/ResolvedFormType.php b/src/Symfony/Component/Form/ResolvedFormType.php
index d7c7a3cab64b..1bca1aa5443c 100644
--- a/src/Symfony/Component/Form/ResolvedFormType.php
+++ b/src/Symfony/Component/Form/ResolvedFormType.php
@@ -56,7 +56,7 @@ class ResolvedFormType implements ResolvedFormTypeInterface
 
     public function __construct(FormTypeInterface $innerType, array $typeExtensions = array(), ResolvedFormTypeInterface $parent = null)
     {
-        $fqcn = get_class($innerType);
+        $fqcn = \get_class($innerType);
         $name = $innerType->getName();
         $hasCustomName = $name !== $fqcn;
 
@@ -71,12 +71,12 @@ public function __construct(FormTypeInterface $innerType, array $typeExtensions
             // Anyone else should only override getBlockPrefix() if they actually
             // want to have a different block prefix than the default one
             if ($isOldOverwritten && !$isNewOverwritten) {
-                @trigger_error(get_class($innerType).': The FormTypeInterface::getName() method is deprecated since Symfony 2.8 and will be removed in 3.0. Remove it from your classes. Use getBlockPrefix() if you want to customize the template block prefix. This method will be added to the FormTypeInterface with Symfony 3.0.', E_USER_DEPRECATED);
+                @trigger_error(\get_class($innerType).': The FormTypeInterface::getName() method is deprecated since Symfony 2.8 and will be removed in 3.0. Remove it from your classes. Use getBlockPrefix() if you want to customize the template block prefix. This method will be added to the FormTypeInterface with Symfony 3.0.', E_USER_DEPRECATED);
             }
 
             $blockPrefix = $innerType->getBlockPrefix();
         } else {
-            @trigger_error(get_class($innerType).': The FormTypeInterface::getBlockPrefix() method will be added in version 3.0. You should extend AbstractType or add it to your implementation.', E_USER_DEPRECATED);
+            @trigger_error(\get_class($innerType).': The FormTypeInterface::getBlockPrefix() method will be added in version 3.0. You should extend AbstractType or add it to your implementation.', E_USER_DEPRECATED);
 
             // Deal with classes that don't extend AbstractType
             // Calculate block prefix from the FQCN by default
@@ -88,7 +88,7 @@ public function __construct(FormTypeInterface $innerType, array $typeExtensions
         if ($hasCustomName && !preg_match('/^[a-z0-9_]*$/i', $name)) {
             throw new InvalidArgumentException(sprintf(
                 'The "%s" form type name ("%s") is not valid. Names must only contain letters, numbers, and "_".',
-                get_class($innerType),
+                \get_class($innerType),
                 $name
             ));
         }
@@ -260,10 +260,10 @@ public function getOptionsResolver()
                 $isNewOverwritten = 'Symfony\Component\Form\AbstractType' !== $reflector->getDeclaringClass()->getName();
 
                 if ($isOldOverwritten && !$isNewOverwritten) {
-                    @trigger_error(get_class($this->innerType).': The FormTypeInterface::setDefaultOptions() method is deprecated since Symfony 2.7 and will be removed in 3.0. Use configureOptions() instead. This method will be added to the FormTypeInterface with Symfony 3.0.', E_USER_DEPRECATED);
+                    @trigger_error(\get_class($this->innerType).': The FormTypeInterface::setDefaultOptions() method is deprecated since Symfony 2.7 and will be removed in 3.0. Use configureOptions() instead. This method will be added to the FormTypeInterface with Symfony 3.0.', E_USER_DEPRECATED);
                 }
             } else {
-                @trigger_error(get_class($this->innerType).': The FormTypeInterface::configureOptions() method will be added in Symfony 3.0. You should extend AbstractType or implement it in your classes.', E_USER_DEPRECATED);
+                @trigger_error(\get_class($this->innerType).': The FormTypeInterface::configureOptions() method will be added in Symfony 3.0. You should extend AbstractType or implement it in your classes.', E_USER_DEPRECATED);
             }
 
             foreach ($this->typeExtensions as $extension) {
@@ -277,10 +277,10 @@ public function getOptionsResolver()
                     $isNewOverwritten = 'Symfony\Component\Form\AbstractTypeExtension' !== $reflector->getDeclaringClass()->getName();
 
                     if ($isOldOverwritten && !$isNewOverwritten) {
-                        @trigger_error(get_class($extension).': The FormTypeExtensionInterface::setDefaultOptions() method is deprecated since Symfony 2.7 and will be removed in 3.0. Use configureOptions() instead. This method will be added to the FormTypeExtensionInterface with Symfony 3.0.', E_USER_DEPRECATED);
+                        @trigger_error(\get_class($extension).': The FormTypeExtensionInterface::setDefaultOptions() method is deprecated since Symfony 2.7 and will be removed in 3.0. Use configureOptions() instead. This method will be added to the FormTypeExtensionInterface with Symfony 3.0.', E_USER_DEPRECATED);
                     }
                 } else {
-                    @trigger_error(get_class($this->innerType).': The FormTypeExtensionInterface::configureOptions() method will be added in Symfony 3.0. You should extend AbstractTypeExtension or implement it in your classes.', E_USER_DEPRECATED);
+                    @trigger_error(\get_class($this->innerType).': The FormTypeExtensionInterface::configureOptions() method will be added in Symfony 3.0. You should extend AbstractTypeExtension or implement it in your classes.', E_USER_DEPRECATED);
                 }
             }
         }
diff --git a/src/Symfony/Component/Form/Test/FormPerformanceTestCase.php b/src/Symfony/Component/Form/Test/FormPerformanceTestCase.php
index dfb4ffaa0115..a6d8dc7411d9 100644
--- a/src/Symfony/Component/Form/Test/FormPerformanceTestCase.php
+++ b/src/Symfony/Component/Form/Test/FormPerformanceTestCase.php
@@ -54,7 +54,7 @@ protected function runTest()
      */
     public function setMaxRunningTime($maxRunningTime)
     {
-        if (is_int($maxRunningTime) && $maxRunningTime >= 0) {
+        if (\is_int($maxRunningTime) && $maxRunningTime >= 0) {
             $this->maxRunningTime = $maxRunningTime;
         } else {
             throw new \InvalidArgumentException();
diff --git a/src/Symfony/Component/Form/Tests/AbstractBootstrap3LayoutTest.php b/src/Symfony/Component/Form/Tests/AbstractBootstrap3LayoutTest.php
index da603a470fd3..576b29e52616 100644
--- a/src/Symfony/Component/Form/Tests/AbstractBootstrap3LayoutTest.php
+++ b/src/Symfony/Component/Form/Tests/AbstractBootstrap3LayoutTest.php
@@ -375,7 +375,7 @@ public function testSingleChoiceAttributes()
             'expanded' => false,
         ));
 
-        $classPart = in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
+        $classPart = \in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
 
         $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
 '/select
@@ -678,7 +678,7 @@ public function testMultipleChoiceAttributes()
             'expanded' => false,
         ));
 
-        $classPart = in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
+        $classPart = \in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
 
         $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
 '/select
@@ -949,7 +949,7 @@ public function testSingleChoiceExpandedAttributes()
             'expanded' => true,
         ));
 
-        $classPart = in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
+        $classPart = \in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
 
         $this->assertWidgetMatchesXpath($form->createView(), array(),
 '/div
@@ -1336,7 +1336,7 @@ public function testMultipleChoiceExpandedAttributes()
             'required' => true,
         ));
 
-        $classPart = in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
+        $classPart = \in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
 
         $this->assertWidgetMatchesXpath($form->createView(), array(),
 '/div
diff --git a/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php b/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php
index 921ac97e3eb5..d8088eb92a23 100644
--- a/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php
+++ b/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php
@@ -23,7 +23,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     protected function setUp()
     {
-        if (!extension_loaded('intl')) {
+        if (!\extension_loaded('intl')) {
             $this->markTestSkipped('Extension intl is required.');
         }
 
@@ -113,7 +113,7 @@ abstract protected function renderForm(FormView $view, array $vars = array());
 
     protected function renderEnctype(FormView $view)
     {
-        $this->markTestSkipped(sprintf('Legacy %s::renderEnctype() is not implemented.', get_class($this)));
+        $this->markTestSkipped(sprintf('Legacy %s::renderEnctype() is not implemented.', \get_class($this)));
     }
 
     abstract protected function renderLabel(FormView $view, $label = null, array $vars = array());
@@ -629,7 +629,7 @@ public function testSingleChoiceAttributes()
             'expanded' => false,
         ));
 
-        $classPart = in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
+        $classPart = \in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
 
         $this->assertWidgetMatchesXpath($form->createView(), array(),
 '/select
@@ -975,7 +975,7 @@ public function testMultipleChoiceAttributes()
             'expanded' => false,
         ));
 
-        $classPart = in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
+        $classPart = \in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
 
         $this->assertWidgetMatchesXpath($form->createView(), array(),
 '/select
@@ -1095,7 +1095,7 @@ public function testSingleChoiceExpandedAttributes()
             'expanded' => true,
         ));
 
-        $classPart = in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
+        $classPart = \in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
 
         $this->assertWidgetMatchesXpath($form->createView(), array(),
 '/div
@@ -1253,7 +1253,7 @@ public function testMultipleChoiceExpandedAttributes()
             'required' => true,
         ));
 
-        $classPart = in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
+        $classPart = \in_array('choice_attr', $this->testableFeatures) ? '[@class="foo&bar"]' : '';
 
         $this->assertWidgetMatchesXpath($form->createView(), array(),
 '/div
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php
index 257aba96903e..82653634d186 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php
@@ -624,7 +624,7 @@ public function provideSameChoices()
             array(0, 0),
             array('a', 'a'),
             // https://github.com/symfony/symfony/issues/10409
-            array(chr(181).'meter', chr(181).'meter'), // UTF-8
+            array(\chr(181).'meter', \chr(181).'meter'), // UTF-8
             array($object, $object),
         );
     }
@@ -654,7 +654,7 @@ public function provideSameKeyChoices()
             array(0, 0),
             array(0, '0'),
             array('a', 'a'),
-            array(chr(181).'meter', chr(181).'meter'),
+            array(\chr(181).'meter', \chr(181).'meter'),
         );
     }
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/MergeCollectionListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/MergeCollectionListenerTest.php
index 2dcbc359eab9..321d702a1bf5 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/MergeCollectionListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/MergeCollectionListenerTest.php
@@ -85,7 +85,7 @@ public function testAddExtraEntriesIfAllowAdd($allowDelete)
         $listener->onSubmit($event);
 
         // The original object was modified
-        if (is_object($originalData)) {
+        if (\is_object($originalData)) {
             $this->assertSame($originalData, $event->getData());
         }
 
@@ -109,7 +109,7 @@ public function testAddExtraEntriesIfAllowAddDontOverwriteExistingIndices($allow
         $listener->onSubmit($event);
 
         // The original object was modified
-        if (is_object($originalData)) {
+        if (\is_object($originalData)) {
             $this->assertSame($originalData, $event->getData());
         }
 
@@ -134,7 +134,7 @@ public function testDoNothingIfNotAllowAdd($allowDelete)
         $listener->onSubmit($event);
 
         // We still have the original object
-        if (is_object($originalData)) {
+        if (\is_object($originalData)) {
             $this->assertSame($originalData, $event->getData());
         }
 
@@ -158,7 +158,7 @@ public function testRemoveMissingEntriesIfAllowDelete($allowAdd)
         $listener->onSubmit($event);
 
         // The original object was modified
-        if (is_object($originalData)) {
+        if (\is_object($originalData)) {
             $this->assertSame($originalData, $event->getData());
         }
 
@@ -183,7 +183,7 @@ public function testDoNothingIfNotAllowDelete($allowAdd)
         $listener->onSubmit($event);
 
         // We still have the original object
-        if (is_object($originalData)) {
+        if (\is_object($originalData)) {
             $this->assertSame($originalData, $event->getData());
         }
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php
index 44f6e45e924c..59dc05cb681c 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php
@@ -148,7 +148,7 @@ public function testExpandedChoicesOptionsTurnIntoChildren()
             'choices_as_values' => true,
         ));
 
-        $this->assertCount(count($this->choices), $form, 'Each choice should become a new field');
+        $this->assertCount(\count($this->choices), $form, 'Each choice should become a new field');
     }
 
     /**
@@ -161,7 +161,7 @@ public function testExpandedFlippedChoicesOptionsTurnIntoChildren()
             'choices' => array_flip($this->choices),
         ));
 
-        $this->assertCount(count($this->choices), $form, 'Each choice should become a new field');
+        $this->assertCount(\count($this->choices), $form, 'Each choice should become a new field');
     }
 
     public function testChoiceListWithScalarValues()
@@ -253,7 +253,7 @@ public function testPlaceholderPresentOnNonRequiredExpandedSingleChoice()
         ));
 
         $this->assertArrayHasKey('placeholder', $form);
-        $this->assertCount(count($this->choices) + 1, $form, 'Each choice should become a new field');
+        $this->assertCount(\count($this->choices) + 1, $form, 'Each choice should become a new field');
     }
 
     public function testPlaceholderNotPresentIfRequired()
@@ -267,7 +267,7 @@ public function testPlaceholderNotPresentIfRequired()
         ));
 
         $this->assertArrayNotHasKey('placeholder', $form);
-        $this->assertCount(count($this->choices), $form, 'Each choice should become a new field');
+        $this->assertCount(\count($this->choices), $form, 'Each choice should become a new field');
     }
 
     public function testPlaceholderNotPresentIfMultiple()
@@ -281,7 +281,7 @@ public function testPlaceholderNotPresentIfMultiple()
         ));
 
         $this->assertArrayNotHasKey('placeholder', $form);
-        $this->assertCount(count($this->choices), $form, 'Each choice should become a new field');
+        $this->assertCount(\count($this->choices), $form, 'Each choice should become a new field');
     }
 
     public function testPlaceholderNotPresentIfEmptyChoice()
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/FormTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/FormTypeTest.php
index c0ddc85a8a16..e92754860aca 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/FormTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/FormTypeTest.php
@@ -40,7 +40,7 @@ public function getReference()
     // to update it
     public function getReferenceCopy()
     {
-        return is_object($this->referenceCopy) ? clone $this->referenceCopy : $this->referenceCopy;
+        return \is_object($this->referenceCopy) ? clone $this->referenceCopy : $this->referenceCopy;
     }
 
     public function setReferenceCopy($reference)
diff --git a/src/Symfony/Component/Form/Tests/Extension/Csrf/Type/FormTypeCsrfExtensionTest.php b/src/Symfony/Component/Form/Tests/Extension/Csrf/Type/FormTypeCsrfExtensionTest.php
index 6432ac688996..3b5e15410a77 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Csrf/Type/FormTypeCsrfExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Csrf/Type/FormTypeCsrfExtensionTest.php
@@ -391,7 +391,7 @@ public function testsTranslateCustomErrorMessage()
         $expected = new FormError('[trans]Foobar[/trans]');
         $expected->setOrigin($form);
 
-        $this->assertGreaterThan(0, count($errors));
+        $this->assertGreaterThan(0, \count($errors));
         $this->assertEquals($expected, $errors[0]);
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataExtractorTest.php b/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataExtractorTest.php
index 9e0b5f57e647..3751ec360b65 100644
--- a/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataExtractorTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataExtractorTest.php
@@ -28,7 +28,7 @@ class FormDataExtractorTest_SimpleValueExporter extends ValueExporter
      */
     public function exportValue($value, $depth = 1, $deep = false)
     {
-        return is_object($value) ? sprintf('object(%s)', get_class($value)) : var_export($value, true);
+        return \is_object($value) ? sprintf('object(%s)', \get_class($value)) : var_export($value, true);
     }
 }
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/Type/UploadValidatorExtensionTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/Type/UploadValidatorExtensionTest.php
index 8c0984f7e4e1..c086bcaa2188 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/Type/UploadValidatorExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/Type/UploadValidatorExtensionTest.php
@@ -39,6 +39,6 @@ public function testPostMaxSizeTranslation()
         $extension->configureOptions($resolver);
         $options = $resolver->resolve();
 
-        $this->assertEquals('translated max {{ max }}!', call_user_func($options['upload_max_size_message']));
+        $this->assertEquals('translated max {{ max }}!', \call_user_func($options['upload_max_size_message']));
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationPathTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationPathTest.php
index 88d5169cd7a4..2e1c9f673daa 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationPathTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationPathTest.php
@@ -96,8 +96,8 @@ public function testCreatePath($string, $entries, $slicedPath = null)
         $path = new ViolationPath($string);
 
         $this->assertSame($slicedPath, $path->__toString());
-        $this->assertCount(count($entries), $path->getElements());
-        $this->assertSame(count($entries), $path->getLength());
+        $this->assertCount(\count($entries), $path->getElements());
+        $this->assertSame(\count($entries), $path->getLength());
 
         foreach ($entries as $index => $entry) {
             $this->assertEquals($entry[0], $path->getElement($index));
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/CustomArrayObject.php b/src/Symfony/Component/Form/Tests/Fixtures/CustomArrayObject.php
index 950f677fd061..91b277303732 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/CustomArrayObject.php
+++ b/src/Symfony/Component/Form/Tests/Fixtures/CustomArrayObject.php
@@ -55,7 +55,7 @@ public function getIterator()
 
     public function count()
     {
-        return count($this->array);
+        return \count($this->array);
     }
 
     public function serialize()
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/TestExtension.php b/src/Symfony/Component/Form/Tests/Fixtures/TestExtension.php
index 8e8628ab8fc6..b6f2d1576fea 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/TestExtension.php
+++ b/src/Symfony/Component/Form/Tests/Fixtures/TestExtension.php
@@ -31,7 +31,7 @@ public function __construct(FormTypeGuesserInterface $guesser)
 
     public function addType(FormTypeInterface $type)
     {
-        $this->types[$type->getName() ?: get_class($type)] = $type;
+        $this->types[$type->getName() ?: \get_class($type)] = $type;
     }
 
     public function getType($name)
diff --git a/src/Symfony/Component/Form/Tests/FormRegistryTest.php b/src/Symfony/Component/Form/Tests/FormRegistryTest.php
index 83f7d4a9bac8..c0ecc6c58593 100644
--- a/src/Symfony/Component/Form/Tests/FormRegistryTest.php
+++ b/src/Symfony/Component/Form/Tests/FormRegistryTest.php
@@ -87,7 +87,7 @@ public function testGetTypeFromExtension()
             ->with($type)
             ->willReturn($resolvedType);
 
-        $this->assertSame($resolvedType, $this->registry->getType(get_class($type)));
+        $this->assertSame($resolvedType, $this->registry->getType(\get_class($type)));
     }
 
     public function testLoadUnregisteredType()
@@ -138,7 +138,7 @@ public function testLegacyGetTypeFromExtension()
 
         // Even types with explicit getName() methods must support access by
         // FQCN to support a smooth transition from 2.8 => 3.0
-        $this->assertSame($resolvedType, $this->registry->getType(get_class($type)));
+        $this->assertSame($resolvedType, $this->registry->getType(\get_class($type)));
     }
 
     public function testGetTypeWithTypeExtensions()
@@ -157,7 +157,7 @@ public function testGetTypeWithTypeExtensions()
             ->with($type, array($ext1, $ext2))
             ->willReturn($resolvedType);
 
-        $this->assertSame($resolvedType, $this->registry->getType(get_class($type)));
+        $this->assertSame($resolvedType, $this->registry->getType(\get_class($type)));
     }
 
     /**
@@ -202,7 +202,7 @@ public function testGetTypeConnectsParent()
             ->with($type, array(), $parentResolvedType)
             ->willReturn($resolvedType);
 
-        $this->assertSame($resolvedType, $this->registry->getType(get_class($type)));
+        $this->assertSame($resolvedType, $this->registry->getType(\get_class($type)));
     }
 
     /**
@@ -275,7 +275,7 @@ public function testHasTypeAfterLoadingFromExtension()
 
         $this->extension2->addType($type);
 
-        $this->assertTrue($this->registry->hasType(get_class($type)));
+        $this->assertTrue($this->registry->hasType(\get_class($type)));
     }
 
     public function testHasTypeIfFQCN()
diff --git a/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php
index 6d3dae218caf..d0bc82e75965 100644
--- a/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php
@@ -33,15 +33,15 @@ public function provideTranslationFiles()
     {
         return array_map(
             function ($filePath) { return (array) $filePath; },
-            glob(dirname(dirname(__DIR__)).'/Resources/translations/*.xlf')
+            glob(\dirname(\dirname(__DIR__)).'/Resources/translations/*.xlf')
         );
     }
 
     public function testNorwegianAlias()
     {
         $this->assertFileEquals(
-            dirname(dirname(__DIR__)).'/Resources/translations/validators.nb.xlf',
-            dirname(dirname(__DIR__)).'/Resources/translations/validators.no.xlf',
+            \dirname(\dirname(__DIR__)).'/Resources/translations/validators.nb.xlf',
+            \dirname(\dirname(__DIR__)).'/Resources/translations/validators.no.xlf',
             'The NO locale should be an alias for the NB variant of the Norwegian language.'
         );
     }
diff --git a/src/Symfony/Component/Form/Util/OrderedHashMap.php b/src/Symfony/Component/Form/Util/OrderedHashMap.php
index 24ec0d529902..6a97559850a3 100644
--- a/src/Symfony/Component/Form/Util/OrderedHashMap.php
+++ b/src/Symfony/Component/Form/Util/OrderedHashMap.php
@@ -169,6 +169,6 @@ public function getIterator()
      */
     public function count()
     {
-        return count($this->elements);
+        return \count($this->elements);
     }
 }
diff --git a/src/Symfony/Component/Form/Util/OrderedHashMapIterator.php b/src/Symfony/Component/Form/Util/OrderedHashMapIterator.php
index d9d874af61a1..3de636392dd8 100644
--- a/src/Symfony/Component/Form/Util/OrderedHashMapIterator.php
+++ b/src/Symfony/Component/Form/Util/OrderedHashMapIterator.php
@@ -73,7 +73,7 @@ public function __construct(array &$elements, array &$orderedKeys, array &$manag
         $this->elements = &$elements;
         $this->orderedKeys = &$orderedKeys;
         $this->managedCursors = &$managedCursors;
-        $this->cursorId = count($managedCursors);
+        $this->cursorId = \count($managedCursors);
 
         $this->managedCursors[$this->cursorId] = &$this->cursor;
     }
diff --git a/src/Symfony/Component/Form/Util/ServerParams.php b/src/Symfony/Component/Form/Util/ServerParams.php
index fc5e9dd27ad3..3d5b76a7c27c 100644
--- a/src/Symfony/Component/Form/Util/ServerParams.php
+++ b/src/Symfony/Component/Form/Util/ServerParams.php
@@ -53,9 +53,9 @@ public function getPostMaxSize()
 
         $max = ltrim($iniMax, '+');
         if (0 === strpos($max, '0x')) {
-            $max = intval($max, 16);
+            $max = \intval($max, 16);
         } elseif (0 === strpos($max, '0')) {
-            $max = intval($max, 8);
+            $max = \intval($max, 8);
         } else {
             $max = (int) $max;
         }
diff --git a/src/Symfony/Component/Form/Util/VirtualFormAwareIterator.php b/src/Symfony/Component/Form/Util/VirtualFormAwareIterator.php
index cc68f430d0d7..6ffb0cdbb9bf 100644
--- a/src/Symfony/Component/Form/Util/VirtualFormAwareIterator.php
+++ b/src/Symfony/Component/Form/Util/VirtualFormAwareIterator.php
@@ -33,7 +33,7 @@ public function __construct(\Traversable $iterator)
          * The {@link Symfony\Component\Form\Util\InheritDataAwareIterator::__construct} method
          * forces this argument to false.
          */
-        if (__CLASS__ === get_class($this)) {
+        if (__CLASS__ === \get_class($this)) {
             @trigger_error('The '.__CLASS__.' class is deprecated since Symfony 2.3 and will be removed in 3.0. Use the Symfony\Component\Form\Util\InheritDataAwareIterator class instead.', E_USER_DEPRECATED);
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/AcceptHeaderItem.php b/src/Symfony/Component/HttpFoundation/AcceptHeaderItem.php
index c69dbbba3566..fe7b08bcad99 100644
--- a/src/Symfony/Component/HttpFoundation/AcceptHeaderItem.php
+++ b/src/Symfony/Component/HttpFoundation/AcceptHeaderItem.php
@@ -57,7 +57,7 @@ public static function fromString($itemValue)
                 $attributes[$bit] = null;
             } else {
                 $parts = explode('=', $bit);
-                $attributes[$parts[0]] = isset($parts[1]) && strlen($parts[1]) > 0 ? $parts[1] : '';
+                $attributes[$parts[0]] = isset($parts[1]) && \strlen($parts[1]) > 0 ? $parts[1] : '';
             }
         }
 
@@ -72,7 +72,7 @@ public static function fromString($itemValue)
     public function __toString()
     {
         $string = $this->value.($this->quality < 1 ? ';q='.$this->quality : '');
-        if (count($this->attributes) > 0) {
+        if (\count($this->attributes) > 0) {
             $string .= ';'.implode(';', array_map(function ($name, $value) {
                 return sprintf(preg_match('/[,;=]/', $value) ? '%s="%s"' : '%s=%s', $name, $value);
             }, array_keys($this->attributes), $this->attributes));
diff --git a/src/Symfony/Component/HttpFoundation/ApacheRequest.php b/src/Symfony/Component/HttpFoundation/ApacheRequest.php
index 84803ebae28f..4e99186dcd50 100644
--- a/src/Symfony/Component/HttpFoundation/ApacheRequest.php
+++ b/src/Symfony/Component/HttpFoundation/ApacheRequest.php
@@ -35,7 +35,7 @@ protected function prepareBaseUrl()
 
         if (false === strpos($this->server->get('REQUEST_URI'), $baseUrl)) {
             // assume mod_rewrite
-            return rtrim(dirname($baseUrl), '/\\');
+            return rtrim(\dirname($baseUrl), '/\\');
         }
 
         return $baseUrl;
diff --git a/src/Symfony/Component/HttpFoundation/BinaryFileResponse.php b/src/Symfony/Component/HttpFoundation/BinaryFileResponse.php
index 7f1f7ed7e78e..7e8e145dbd35 100644
--- a/src/Symfony/Component/HttpFoundation/BinaryFileResponse.php
+++ b/src/Symfony/Component/HttpFoundation/BinaryFileResponse.php
@@ -165,7 +165,7 @@ public function setContentDisposition($disposition, $filename = '', $filenameFal
             for ($i = 0, $filenameLength = mb_strlen($filename, $encoding); $i < $filenameLength; ++$i) {
                 $char = mb_substr($filename, $i, 1, $encoding);
 
-                if ('%' === $char || ord($char) < 32 || ord($char) > 126) {
+                if ('%' === $char || \ord($char) < 32 || \ord($char) > 126) {
                     $filenameFallback .= '_';
                 } else {
                     $filenameFallback .= $char;
@@ -218,12 +218,12 @@ public function prepare(Request $request)
                 foreach (explode(',', $request->headers->get('X-Accel-Mapping', '')) as $mapping) {
                     $mapping = explode('=', $mapping, 2);
 
-                    if (2 === count($mapping)) {
+                    if (2 === \count($mapping)) {
                         $pathPrefix = trim($mapping[0]);
                         $location = trim($mapping[1]);
 
-                        if (substr($path, 0, strlen($pathPrefix)) === $pathPrefix) {
-                            $path = $location.substr($path, strlen($pathPrefix));
+                        if (substr($path, 0, \strlen($pathPrefix)) === $pathPrefix) {
+                            $path = $location.substr($path, \strlen($pathPrefix));
                             break;
                         }
                     }
diff --git a/src/Symfony/Component/HttpFoundation/File/Exception/UnexpectedTypeException.php b/src/Symfony/Component/HttpFoundation/File/Exception/UnexpectedTypeException.php
index 0444b8778218..62005d3b635d 100644
--- a/src/Symfony/Component/HttpFoundation/File/Exception/UnexpectedTypeException.php
+++ b/src/Symfony/Component/HttpFoundation/File/Exception/UnexpectedTypeException.php
@@ -15,6 +15,6 @@ class UnexpectedTypeException extends FileException
 {
     public function __construct($value, $expectedType)
     {
-        parent::__construct(sprintf('Expected argument of type %s, %s given', $expectedType, is_object($value) ? get_class($value) : gettype($value)));
+        parent::__construct(sprintf('Expected argument of type %s, %s given', $expectedType, \is_object($value) ? \get_class($value) : \gettype($value)));
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/File/MimeType/FileBinaryMimeTypeGuesser.php b/src/Symfony/Component/HttpFoundation/File/MimeType/FileBinaryMimeTypeGuesser.php
index 3c358104651b..8181c44e2758 100644
--- a/src/Symfony/Component/HttpFoundation/File/MimeType/FileBinaryMimeTypeGuesser.php
+++ b/src/Symfony/Component/HttpFoundation/File/MimeType/FileBinaryMimeTypeGuesser.php
@@ -49,7 +49,7 @@ public static function isSupported()
             return $supported;
         }
 
-        if ('\\' === DIRECTORY_SEPARATOR || !function_exists('passthru') || !function_exists('escapeshellarg')) {
+        if ('\\' === DIRECTORY_SEPARATOR || !\function_exists('passthru') || !\function_exists('escapeshellarg')) {
             return $supported = false;
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/File/MimeType/FileinfoMimeTypeGuesser.php b/src/Symfony/Component/HttpFoundation/File/MimeType/FileinfoMimeTypeGuesser.php
index 9b42835e4304..d185af358746 100644
--- a/src/Symfony/Component/HttpFoundation/File/MimeType/FileinfoMimeTypeGuesser.php
+++ b/src/Symfony/Component/HttpFoundation/File/MimeType/FileinfoMimeTypeGuesser.php
@@ -40,7 +40,7 @@ public function __construct($magicFile = null)
      */
     public static function isSupported()
     {
-        return function_exists('finfo_open');
+        return \function_exists('finfo_open');
     }
 
     /**
diff --git a/src/Symfony/Component/HttpFoundation/File/UploadedFile.php b/src/Symfony/Component/HttpFoundation/File/UploadedFile.php
index 39b29775ccd8..de6ce75cc94b 100644
--- a/src/Symfony/Component/HttpFoundation/File/UploadedFile.php
+++ b/src/Symfony/Component/HttpFoundation/File/UploadedFile.php
@@ -222,9 +222,9 @@ public static function getMaxFilesize()
 
         $max = ltrim($iniMax, '+');
         if (0 === strpos($max, '0x')) {
-            $max = intval($max, 16);
+            $max = \intval($max, 16);
         } elseif (0 === strpos($max, '0')) {
-            $max = intval($max, 8);
+            $max = \intval($max, 8);
         } else {
             $max = (int) $max;
         }
diff --git a/src/Symfony/Component/HttpFoundation/FileBag.php b/src/Symfony/Component/HttpFoundation/FileBag.php
index 5edd0e6210c5..c135ad641248 100644
--- a/src/Symfony/Component/HttpFoundation/FileBag.php
+++ b/src/Symfony/Component/HttpFoundation/FileBag.php
@@ -45,7 +45,7 @@ public function replace(array $files = array())
      */
     public function set($key, $value)
     {
-        if (!is_array($value) && !$value instanceof UploadedFile) {
+        if (!\is_array($value) && !$value instanceof UploadedFile) {
             throw new \InvalidArgumentException('An uploaded file must be an array or an instance of UploadedFile.');
         }
 
@@ -76,7 +76,7 @@ protected function convertFileInformation($file)
         }
 
         $file = $this->fixPhpFilesArray($file);
-        if (is_array($file)) {
+        if (\is_array($file)) {
             $keys = array_keys($file);
             sort($keys);
 
@@ -113,14 +113,14 @@ protected function convertFileInformation($file)
      */
     protected function fixPhpFilesArray($data)
     {
-        if (!is_array($data)) {
+        if (!\is_array($data)) {
             return $data;
         }
 
         $keys = array_keys($data);
         sort($keys);
 
-        if (self::$fileKeys != $keys || !isset($data['name']) || !is_array($data['name'])) {
+        if (self::$fileKeys != $keys || !isset($data['name']) || !\is_array($data['name'])) {
             return $data;
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/HeaderBag.php b/src/Symfony/Component/HttpFoundation/HeaderBag.php
index 890dabd13033..06c9e9a0c7c5 100644
--- a/src/Symfony/Component/HttpFoundation/HeaderBag.php
+++ b/src/Symfony/Component/HttpFoundation/HeaderBag.php
@@ -120,7 +120,7 @@ public function get($key, $default = null, $first = true)
         }
 
         if ($first) {
-            return count($this->headers[$key]) ? $this->headers[$key][0] : $default;
+            return \count($this->headers[$key]) ? $this->headers[$key][0] : $default;
         }
 
         return $this->headers[$key];
@@ -172,7 +172,7 @@ public function has($key)
      */
     public function contains($key, $value)
     {
-        return in_array($value, $this->get($key, null, false));
+        return \in_array($value, $this->get($key, null, false));
     }
 
     /**
@@ -280,7 +280,7 @@ public function getIterator()
      */
     public function count()
     {
-        return count($this->headers);
+        return \count($this->headers);
     }
 
     protected function getCacheControlHeader()
diff --git a/src/Symfony/Component/HttpFoundation/IpUtils.php b/src/Symfony/Component/HttpFoundation/IpUtils.php
index 86d135b2d3af..a1bfa90885dc 100644
--- a/src/Symfony/Component/HttpFoundation/IpUtils.php
+++ b/src/Symfony/Component/HttpFoundation/IpUtils.php
@@ -37,7 +37,7 @@ private function __construct()
      */
     public static function checkIp($requestIp, $ips)
     {
-        if (!is_array($ips)) {
+        if (!\is_array($ips)) {
             $ips = array($ips);
         }
 
@@ -116,7 +116,7 @@ public static function checkIp6($requestIp, $ip)
             return self::$checkedIps[$cacheKey];
         }
 
-        if (!((extension_loaded('sockets') && defined('AF_INET6')) || @inet_pton('::1'))) {
+        if (!((\extension_loaded('sockets') && \defined('AF_INET6')) || @inet_pton('::1'))) {
             throw new \RuntimeException('Unable to check Ipv6. Check that PHP was not compiled with option "disable-ipv6".');
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/JsonResponse.php b/src/Symfony/Component/HttpFoundation/JsonResponse.php
index d3695d1535c4..5a9e75586baf 100644
--- a/src/Symfony/Component/HttpFoundation/JsonResponse.php
+++ b/src/Symfony/Component/HttpFoundation/JsonResponse.php
@@ -90,7 +90,7 @@ public function setCallback($callback = null)
             );
             $parts = explode('.', $callback);
             foreach ($parts as $part) {
-                if (!preg_match($pattern, $part) || in_array($part, $reserved, true)) {
+                if (!preg_match($pattern, $part) || \in_array($part, $reserved, true)) {
                     throw new \InvalidArgumentException('The callback name is not valid.');
                 }
             }
@@ -112,7 +112,7 @@ public function setCallback($callback = null)
      */
     public function setData($data = array())
     {
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             // HHVM does not trigger any warnings and let exceptions
             // thrown from a JsonSerializable object pass through.
             // If only PHP did the same...
@@ -136,7 +136,7 @@ public function setData($data = array())
                     restore_error_handler();
                     set_error_handler(function () use ($errorHandler) {
                         if (JSON_ERROR_NONE === json_last_error()) {
-                            return $errorHandler && false !== call_user_func_array($errorHandler, func_get_args());
+                            return $errorHandler && false !== \call_user_func_array($errorHandler, \func_get_args());
                         }
                     });
                     $data = json_encode($data, $this->encodingOptions);
@@ -153,7 +153,7 @@ public function setData($data = array())
                 if (\PHP_VERSION_ID < 50500 || !interface_exists('JsonSerializable', false)) {
                     restore_error_handler();
                 }
-                if (interface_exists('JsonSerializable', false) && 'Exception' === get_class($e) && 0 === strpos($e->getMessage(), 'Failed calling ')) {
+                if (interface_exists('JsonSerializable', false) && 'Exception' === \get_class($e) && 0 === strpos($e->getMessage(), 'Failed calling ')) {
                     throw $e->getPrevious() ?: $e;
                 }
                 throw $e;
diff --git a/src/Symfony/Component/HttpFoundation/ParameterBag.php b/src/Symfony/Component/HttpFoundation/ParameterBag.php
index b524c27e526e..fdf60e56e9b2 100644
--- a/src/Symfony/Component/HttpFoundation/ParameterBag.php
+++ b/src/Symfony/Component/HttpFoundation/ParameterBag.php
@@ -101,7 +101,7 @@ public function get($key, $default = null, $deep = false)
 
         $value = $this->parameters[$root];
         $currentKey = null;
-        for ($i = $pos, $c = strlen($key); $i < $c; ++$i) {
+        for ($i = $pos, $c = \strlen($key); $i < $c; ++$i) {
             $char = $key[$i];
 
             if ('[' === $char) {
@@ -115,7 +115,7 @@ public function get($key, $default = null, $deep = false)
                     throw new \InvalidArgumentException(sprintf('Malformed path. Unexpected "]" at position %d.', $i));
                 }
 
-                if (!is_array($value) || !array_key_exists($currentKey, $value)) {
+                if (!\is_array($value) || !array_key_exists($currentKey, $value)) {
                     return $default;
                 }
 
@@ -263,7 +263,7 @@ public function filter($key, $default = null, $filter = FILTER_DEFAULT, $options
                 $filters[filter_id($tmp)] = 1;
             }
         }
-        if (is_bool($filter) || !isset($filters[$filter]) || is_array($deep)) {
+        if (\is_bool($filter) || !isset($filters[$filter]) || \is_array($deep)) {
             @trigger_error('Passing the $deep boolean as 3rd argument to the '.__METHOD__.' method is deprecated since Symfony 2.8 and will be removed in 3.0. Remove it altogether as the $deep argument will be removed in 3.0.', E_USER_DEPRECATED);
             $tmp = $deep;
             $deep = $filter;
@@ -274,12 +274,12 @@ public function filter($key, $default = null, $filter = FILTER_DEFAULT, $options
         $value = $this->get($key, $default, $deep);
 
         // Always turn $options into an array - this allows filter_var option shortcuts.
-        if (!is_array($options) && $options) {
+        if (!\is_array($options) && $options) {
             $options = array('flags' => $options);
         }
 
         // Add a convenience check for arrays.
-        if (is_array($value) && !isset($options['flags'])) {
+        if (\is_array($value) && !isset($options['flags'])) {
             $options['flags'] = FILTER_REQUIRE_ARRAY;
         }
 
@@ -303,6 +303,6 @@ public function getIterator()
      */
     public function count()
     {
-        return count($this->parameters);
+        return \count($this->parameters);
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Request.php b/src/Symfony/Component/HttpFoundation/Request.php
index 60a7c47ad9cd..f055201df525 100644
--- a/src/Symfony/Component/HttpFoundation/Request.php
+++ b/src/Symfony/Component/HttpFoundation/Request.php
@@ -288,7 +288,7 @@ public static function createFromGlobals()
         $request = self::createRequestFromFactory($_GET, $_POST, array(), $_COOKIE, $_FILES, $server);
 
         if (0 === strpos($request->headers->get('CONTENT_TYPE'), 'application/x-www-form-urlencoded')
-            && in_array(strtoupper($request->server->get('REQUEST_METHOD', 'GET')), array('PUT', 'DELETE', 'PATCH'))
+            && \in_array(strtoupper($request->server->get('REQUEST_METHOD', 'GET')), array('PUT', 'DELETE', 'PATCH'))
         ) {
             parse_str($request->getContent(), $data);
             $request->request = new ParameterBag($data);
@@ -540,7 +540,7 @@ public function overrideGlobals()
 
         foreach ($this->headers->all() as $key => $value) {
             $key = strtoupper(str_replace('-', '_', $key));
-            if (in_array($key, array('CONTENT_TYPE', 'CONTENT_LENGTH'))) {
+            if (\in_array($key, array('CONTENT_TYPE', 'CONTENT_LENGTH'))) {
                 $_SERVER[$key] = implode(', ', $value);
             } else {
                 $_SERVER['HTTP_'.$key] = implode(', ', $value);
@@ -1133,7 +1133,7 @@ public function getRelativeUriForPath($path)
         }
 
         $targetDirs[] = $targetFile;
-        $path = str_repeat('../', count($sourceDirs)).implode('/', $targetDirs);
+        $path = str_repeat('../', \count($sourceDirs)).implode('/', $targetDirs);
 
         // A reference to the same base directory or an empty subdirectory must be prefixed with "./".
         // This also applies to a segment with a colon character (e.g., "file:colon") that cannot be used
@@ -1176,7 +1176,7 @@ public function getQueryString()
     public function isSecure()
     {
         if ($this->isFromTrustedProxy() && $proto = $this->getTrustedValues(self::HEADER_CLIENT_PROTO)) {
-            return in_array(strtolower($proto[0]), array('https', 'on', 'ssl', '1'), true);
+            return \in_array(strtolower($proto[0]), array('https', 'on', 'ssl', '1'), true);
         }
 
         $https = $this->server->get('HTTPS');
@@ -1220,10 +1220,10 @@ public function getHost()
             throw new \UnexpectedValueException(sprintf('Invalid Host "%s"', $host));
         }
 
-        if (count(self::$trustedHostPatterns) > 0) {
+        if (\count(self::$trustedHostPatterns) > 0) {
             // to avoid host header injection attacks, you should provide a list of trusted host patterns
 
-            if (in_array($host, self::$trustedHosts)) {
+            if (\in_array($host, self::$trustedHosts)) {
                 return $host;
             }
 
@@ -1331,10 +1331,10 @@ public function getFormat($mimeType)
         }
 
         foreach (static::$formats as $format => $mimeTypes) {
-            if (in_array($mimeType, (array) $mimeTypes)) {
+            if (\in_array($mimeType, (array) $mimeTypes)) {
                 return $format;
             }
-            if (null !== $canonicalMimeType && in_array($canonicalMimeType, (array) $mimeTypes)) {
+            if (null !== $canonicalMimeType && \in_array($canonicalMimeType, (array) $mimeTypes)) {
                 return $format;
             }
         }
@@ -1352,7 +1352,7 @@ public function setFormat($format, $mimeTypes)
             static::initializeFormats();
         }
 
-        static::$formats[$format] = is_array($mimeTypes) ? $mimeTypes : array($mimeTypes);
+        static::$formats[$format] = \is_array($mimeTypes) ? $mimeTypes : array($mimeTypes);
     }
 
     /**
@@ -1464,7 +1464,7 @@ public function isMethod($method)
      */
     public function isMethodSafe(/* $andCacheable = true */)
     {
-        return in_array($this->getMethod(), 0 < func_num_args() && !func_get_arg(0) ? array('GET', 'HEAD', 'OPTIONS', 'TRACE') : array('GET', 'HEAD'));
+        return \in_array($this->getMethod(), 0 < \func_num_args() && !func_get_arg(0) ? array('GET', 'HEAD', 'OPTIONS', 'TRACE') : array('GET', 'HEAD'));
     }
 
     /**
@@ -1476,7 +1476,7 @@ public function isMethodSafe(/* $andCacheable = true */)
      */
     public function isMethodCacheable()
     {
-        return in_array($this->getMethod(), array('GET', 'HEAD'));
+        return \in_array($this->getMethod(), array('GET', 'HEAD'));
     }
 
     /**
@@ -1490,7 +1490,7 @@ public function isMethodCacheable()
      */
     public function getContent($asResource = false)
     {
-        $currentContentIsResource = is_resource($this->content);
+        $currentContentIsResource = \is_resource($this->content);
         if (\PHP_VERSION_ID < 50600 && false === $this->content) {
             throw new \LogicException('getContent() can only be called once when using the resource return type and PHP below 5.6.');
         }
@@ -1503,7 +1503,7 @@ public function getContent($asResource = false)
             }
 
             // Content passed in parameter (test)
-            if (is_string($this->content)) {
+            if (\is_string($this->content)) {
                 $resource = fopen('php://temp', 'r+');
                 fwrite($resource, $this->content);
                 rewind($resource);
@@ -1571,7 +1571,7 @@ public function getPreferredLanguage(array $locales = null)
             $extendedPreferredLanguages[] = $language;
             if (false !== $position = strpos($language, '_')) {
                 $superLanguage = substr($language, 0, $position);
-                if (!in_array($superLanguage, $preferredLanguages)) {
+                if (!\in_array($superLanguage, $preferredLanguages)) {
                     $extendedPreferredLanguages[] = $superLanguage;
                 }
             }
@@ -1602,11 +1602,11 @@ public function getLanguages()
                     // Language not listed in ISO 639 that are not variants
                     // of any listed language, which can be registered with the
                     // i-prefix, such as i-cherokee
-                    if (count($codes) > 1) {
+                    if (\count($codes) > 1) {
                         $lang = $codes[1];
                     }
                 } else {
-                    for ($i = 0, $max = count($codes); $i < $max; ++$i) {
+                    for ($i = 0, $max = \count($codes); $i < $max; ++$i) {
                         if (0 === $i) {
                             $lang = strtolower($codes[0]);
                         } else {
@@ -1712,7 +1712,7 @@ protected function prepareRequestUri()
             // HTTP proxy reqs setup request URI with scheme and host [and port] + the URL path, only use URL path
             $schemeAndHttpHost = $this->getSchemeAndHttpHost();
             if (0 === strpos($requestUri, $schemeAndHttpHost)) {
-                $requestUri = substr($requestUri, strlen($schemeAndHttpHost));
+                $requestUri = substr($requestUri, \strlen($schemeAndHttpHost));
             }
         } elseif ($this->server->has('ORIG_PATH_INFO')) {
             // IIS 5.0, PHP as CGI
@@ -1752,7 +1752,7 @@ protected function prepareBaseUrl()
             $segs = explode('/', trim($file, '/'));
             $segs = array_reverse($segs);
             $index = 0;
-            $last = count($segs);
+            $last = \count($segs);
             $baseUrl = '';
             do {
                 $seg = $segs[$index];
@@ -1772,7 +1772,7 @@ protected function prepareBaseUrl()
             return $prefix;
         }
 
-        if ($baseUrl && false !== $prefix = $this->getUrlencodedPrefix($requestUri, rtrim(dirname($baseUrl), '/'.DIRECTORY_SEPARATOR).'/')) {
+        if ($baseUrl && false !== $prefix = $this->getUrlencodedPrefix($requestUri, rtrim(\dirname($baseUrl), '/'.DIRECTORY_SEPARATOR).'/')) {
             // directory portion of $baseUrl matches
             return rtrim($prefix, '/'.DIRECTORY_SEPARATOR);
         }
@@ -1791,8 +1791,8 @@ protected function prepareBaseUrl()
         // If using mod_rewrite or ISAPI_Rewrite strip the script filename
         // out of baseUrl. $pos !== 0 makes sure it is not matching a value
         // from PATH_INFO or QUERY_STRING
-        if (strlen($requestUri) >= strlen($baseUrl) && (false !== $pos = strpos($requestUri, $baseUrl)) && 0 !== $pos) {
-            $baseUrl = substr($requestUri, 0, $pos + strlen($baseUrl));
+        if (\strlen($requestUri) >= \strlen($baseUrl) && (false !== $pos = strpos($requestUri, $baseUrl)) && 0 !== $pos) {
+            $baseUrl = substr($requestUri, 0, $pos + \strlen($baseUrl));
         }
 
         return rtrim($baseUrl, '/'.DIRECTORY_SEPARATOR);
@@ -1812,7 +1812,7 @@ protected function prepareBasePath()
         }
 
         if (basename($baseUrl) === $filename) {
-            $basePath = dirname($baseUrl);
+            $basePath = \dirname($baseUrl);
         } else {
             $basePath = $baseUrl;
         }
@@ -1845,7 +1845,7 @@ protected function preparePathInfo()
             $requestUri = '/'.$requestUri;
         }
 
-        $pathInfo = substr($requestUri, strlen($baseUrl));
+        $pathInfo = substr($requestUri, \strlen($baseUrl));
         if (null !== $baseUrl && (false === $pathInfo || '' === $pathInfo)) {
             // If substr() returns false then PATH_INFO is set to an empty string
             return '/';
@@ -1909,7 +1909,7 @@ private function getUrlencodedPrefix($string, $prefix)
             return false;
         }
 
-        $len = strlen($prefix);
+        $len = \strlen($prefix);
 
         if (preg_match(sprintf('#^(%%[[:xdigit:]]{2}|.){%d}#', $len), $string, $match)) {
             return $match[0];
@@ -1921,7 +1921,7 @@ private function getUrlencodedPrefix($string, $prefix)
     private static function createRequestFromFactory(array $query = array(), array $request = array(), array $attributes = array(), array $cookies = array(), array $files = array(), array $server = array(), $content = null)
     {
         if (self::$requestFactory) {
-            $request = call_user_func(self::$requestFactory, $query, $request, $attributes, $cookies, $files, $server, $content);
+            $request = \call_user_func(self::$requestFactory, $query, $request, $attributes, $cookies, $files, $server, $content);
 
             if (!$request instanceof self) {
                 throw new \LogicException('The Request factory must return an instance of Symfony\Component\HttpFoundation\Request.');
diff --git a/src/Symfony/Component/HttpFoundation/RequestMatcher.php b/src/Symfony/Component/HttpFoundation/RequestMatcher.php
index 076d077c7d07..6b4cef147d99 100644
--- a/src/Symfony/Component/HttpFoundation/RequestMatcher.php
+++ b/src/Symfony/Component/HttpFoundation/RequestMatcher.php
@@ -145,11 +145,11 @@ public function matchAttribute($key, $regexp)
      */
     public function matches(Request $request)
     {
-        if ($this->schemes && !in_array($request->getScheme(), $this->schemes, true)) {
+        if ($this->schemes && !\in_array($request->getScheme(), $this->schemes, true)) {
             return false;
         }
 
-        if ($this->methods && !in_array($request->getMethod(), $this->methods, true)) {
+        if ($this->methods && !\in_array($request->getMethod(), $this->methods, true)) {
             return false;
         }
 
@@ -173,6 +173,6 @@ public function matches(Request $request)
 
         // Note to future implementors: add additional checks above the
         // foreach above or else your check might not be run!
-        return 0 === count($this->ips);
+        return 0 === \count($this->ips);
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/RequestStack.php b/src/Symfony/Component/HttpFoundation/RequestStack.php
index 3d9cfd0c6419..40123f66f910 100644
--- a/src/Symfony/Component/HttpFoundation/RequestStack.php
+++ b/src/Symfony/Component/HttpFoundation/RequestStack.php
@@ -92,7 +92,7 @@ public function getMasterRequest()
      */
     public function getParentRequest()
     {
-        $pos = count($this->requests) - 2;
+        $pos = \count($this->requests) - 2;
 
         if (!isset($this->requests[$pos])) {
             return;
diff --git a/src/Symfony/Component/HttpFoundation/Response.php b/src/Symfony/Component/HttpFoundation/Response.php
index 3a1b5ca8f885..22099213917e 100644
--- a/src/Symfony/Component/HttpFoundation/Response.php
+++ b/src/Symfony/Component/HttpFoundation/Response.php
@@ -382,7 +382,7 @@ public function send()
         $this->sendHeaders();
         $this->sendContent();
 
-        if (function_exists('fastcgi_finish_request')) {
+        if (\function_exists('fastcgi_finish_request')) {
             fastcgi_finish_request();
         } elseif (!\in_array(PHP_SAPI, array('cli', 'phpdbg'), true)) {
             static::closeOutputBuffers(0, true);
@@ -404,8 +404,8 @@ public function send()
      */
     public function setContent($content)
     {
-        if (null !== $content && !is_string($content) && !is_numeric($content) && !is_callable(array($content, '__toString'))) {
-            throw new \UnexpectedValueException(sprintf('The Response content must be a string or object implementing __toString(), "%s" given.', gettype($content)));
+        if (null !== $content && !\is_string($content) && !is_numeric($content) && !\is_callable(array($content, '__toString'))) {
+            throw new \UnexpectedValueException(sprintf('The Response content must be a string or object implementing __toString(), "%s" given.', \gettype($content)));
         }
 
         $this->content = (string) $content;
@@ -537,7 +537,7 @@ public function getCharset()
      */
     public function isCacheable()
     {
-        if (!in_array($this->statusCode, array(200, 203, 300, 301, 302, 404, 410))) {
+        if (!\in_array($this->statusCode, array(200, 203, 300, 301, 302, 404, 410))) {
             return false;
         }
 
@@ -1029,7 +1029,7 @@ public function isNotModified(Request $request)
         $modifiedSince = $request->headers->get('If-Modified-Since');
 
         if ($etags = $request->getETags()) {
-            $notModified = in_array($this->getEtag(), $etags) || in_array('*', $etags);
+            $notModified = \in_array($this->getEtag(), $etags) || \in_array('*', $etags);
         }
 
         if ($modifiedSince && $lastModified) {
@@ -1144,7 +1144,7 @@ public function isNotFound()
      */
     public function isRedirect($location = null)
     {
-        return in_array($this->statusCode, array(201, 301, 302, 303, 307, 308)) && (null === $location ?: $location == $this->headers->get('Location'));
+        return \in_array($this->statusCode, array(201, 301, 302, 303, 307, 308)) && (null === $location ?: $location == $this->headers->get('Location'));
     }
 
     /**
@@ -1154,7 +1154,7 @@ public function isRedirect($location = null)
      */
     public function isEmpty()
     {
-        return in_array($this->statusCode, array(204, 304));
+        return \in_array($this->statusCode, array(204, 304));
     }
 
     /**
@@ -1168,8 +1168,8 @@ public function isEmpty()
     public static function closeOutputBuffers($targetLevel, $flush)
     {
         $status = ob_get_status(true);
-        $level = count($status);
-        $flags = defined('PHP_OUTPUT_HANDLER_REMOVABLE') ? PHP_OUTPUT_HANDLER_REMOVABLE | ($flush ? PHP_OUTPUT_HANDLER_FLUSHABLE : PHP_OUTPUT_HANDLER_CLEANABLE) : -1;
+        $level = \count($status);
+        $flags = \defined('PHP_OUTPUT_HANDLER_REMOVABLE') ? PHP_OUTPUT_HANDLER_REMOVABLE | ($flush ? PHP_OUTPUT_HANDLER_FLUSHABLE : PHP_OUTPUT_HANDLER_CLEANABLE) : -1;
 
         while ($level-- > $targetLevel && ($s = $status[$level]) && (!isset($s['del']) ? !isset($s['flags']) || ($s['flags'] & $flags) === $flags : $s['del'])) {
             if ($flush) {
diff --git a/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php b/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php
index c299c369288d..e97eefc4497b 100644
--- a/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php
+++ b/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php
@@ -87,7 +87,7 @@ public function set($key, $values, $replace = true)
         $this->headerNames[$uniqueKey] = $key;
 
         // ensure the cache-control header has sensible defaults
-        if (in_array($uniqueKey, array('cache-control', 'etag', 'last-modified', 'expires'))) {
+        if (\in_array($uniqueKey, array('cache-control', 'etag', 'last-modified', 'expires'))) {
             $computed = $this->computeCacheControlValue();
             $this->headers['cache-control'] = array($computed);
             $this->headerNames['cache-control'] = 'Cache-Control';
@@ -166,7 +166,7 @@ public function removeCookie($name, $path = '/', $domain = null)
      */
     public function getCookies($format = self::COOKIES_FLAT)
     {
-        if (!in_array($format, array(self::COOKIES_FLAT, self::COOKIES_ARRAY))) {
+        if (!\in_array($format, array(self::COOKIES_FLAT, self::COOKIES_ARRAY))) {
             throw new \InvalidArgumentException(sprintf('Format "%s" invalid (%s).', $format, implode(', ', array(self::COOKIES_FLAT, self::COOKIES_ARRAY))));
         }
 
@@ -217,7 +217,7 @@ public function clearCookie($name, $path = '/', $domain = null, $secure = false,
      */
     public function makeDisposition($disposition, $filename, $filenameFallback = '')
     {
-        if (!in_array($disposition, array(self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE))) {
+        if (!\in_array($disposition, array(self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE))) {
             throw new \InvalidArgumentException(sprintf('The disposition must be either "%s" or "%s".', self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE));
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/ServerBag.php b/src/Symfony/Component/HttpFoundation/ServerBag.php
index 19d2022ef7dd..d8ab561aafb1 100644
--- a/src/Symfony/Component/HttpFoundation/ServerBag.php
+++ b/src/Symfony/Component/HttpFoundation/ServerBag.php
@@ -68,7 +68,7 @@ public function getHeaders()
                 if (0 === stripos($authorizationHeader, 'basic ')) {
                     // Decode AUTHORIZATION header into PHP_AUTH_USER and PHP_AUTH_PW when authorization header is basic
                     $exploded = explode(':', base64_decode(substr($authorizationHeader, 6)), 2);
-                    if (2 == count($exploded)) {
+                    if (2 == \count($exploded)) {
                         list($headers['PHP_AUTH_USER'], $headers['PHP_AUTH_PW']) = $exploded;
                     }
                 } elseif (empty($this->parameters['PHP_AUTH_DIGEST']) && (0 === stripos($authorizationHeader, 'digest '))) {
diff --git a/src/Symfony/Component/HttpFoundation/Session/Attribute/AttributeBag.php b/src/Symfony/Component/HttpFoundation/Session/Attribute/AttributeBag.php
index ea1fda290fdf..fc5fb14101b2 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Attribute/AttributeBag.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Attribute/AttributeBag.php
@@ -143,6 +143,6 @@ public function getIterator()
      */
     public function count()
     {
-        return count($this->attributes);
+        return \count($this->attributes);
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Session/Attribute/NamespacedAttributeBag.php b/src/Symfony/Component/HttpFoundation/Session/Attribute/NamespacedAttributeBag.php
index f9df69e90782..2f1e01a971a9 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Attribute/NamespacedAttributeBag.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Attribute/NamespacedAttributeBag.php
@@ -110,7 +110,7 @@ protected function &resolveAttributePath($name, $writeContext = false)
         }
 
         $parts = explode($this->namespaceCharacter, $name);
-        if (count($parts) < 2) {
+        if (\count($parts) < 2) {
             if (!$writeContext) {
                 return $array;
             }
@@ -120,7 +120,7 @@ protected function &resolveAttributePath($name, $writeContext = false)
             return $array;
         }
 
-        unset($parts[count($parts) - 1]);
+        unset($parts[\count($parts) - 1]);
 
         foreach ($parts as $part) {
             if (null !== $array && !array_key_exists($part, $array)) {
diff --git a/src/Symfony/Component/HttpFoundation/Session/Session.php b/src/Symfony/Component/HttpFoundation/Session/Session.php
index d20a4daff90f..e3ad5b95aa7c 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Session.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Session.php
@@ -136,7 +136,7 @@ public function getIterator()
      */
     public function count()
     {
-        return count($this->storage->getBag($this->attributeName)->all());
+        return \count($this->storage->getBag($this->attributeName)->all());
     }
 
     /**
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
index bb000f5c9a7a..1756ae564808 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
@@ -507,7 +507,7 @@ private function doRead($sessionId)
                     return '';
                 }
 
-                return is_resource($sessionRows[0][0]) ? stream_get_contents($sessionRows[0][0]) : $sessionRows[0][0];
+                return \is_resource($sessionRows[0][0]) ? stream_get_contents($sessionRows[0][0]) : $sessionRows[0][0];
             }
 
             if (null !== $insertStmt) {
@@ -617,11 +617,11 @@ private function doAdvisoryLock($sessionId)
     private function convertStringToInt($string)
     {
         if (4 === \PHP_INT_SIZE) {
-            return (ord($string[3]) << 24) + (ord($string[2]) << 16) + (ord($string[1]) << 8) + ord($string[0]);
+            return (\ord($string[3]) << 24) + (\ord($string[2]) << 16) + (\ord($string[1]) << 8) + \ord($string[0]);
         }
 
-        $int1 = (ord($string[7]) << 24) + (ord($string[6]) << 16) + (ord($string[5]) << 8) + ord($string[4]);
-        $int2 = (ord($string[3]) << 24) + (ord($string[2]) << 16) + (ord($string[1]) << 8) + ord($string[0]);
+        $int1 = (\ord($string[7]) << 24) + (\ord($string[6]) << 16) + (\ord($string[5]) << 8) + \ord($string[4]);
+        $int2 = (\ord($string[3]) << 24) + (\ord($string[2]) << 16) + (\ord($string[1]) << 8) + \ord($string[0]);
 
         return $int2 + ($int1 << 32);
     }
diff --git a/src/Symfony/Component/HttpFoundation/StreamedResponse.php b/src/Symfony/Component/HttpFoundation/StreamedResponse.php
index 41ba4dc4e78c..8552d7130580 100644
--- a/src/Symfony/Component/HttpFoundation/StreamedResponse.php
+++ b/src/Symfony/Component/HttpFoundation/StreamedResponse.php
@@ -69,7 +69,7 @@ public static function create($callback = null, $status = 200, $headers = array(
      */
     public function setCallback($callback)
     {
-        if (!is_callable($callback)) {
+        if (!\is_callable($callback)) {
             throw new \LogicException('The Response callback must be a valid PHP callable.');
         }
         $this->callback = $callback;
@@ -108,7 +108,7 @@ public function sendContent()
             throw new \LogicException('The Response callback must not be null.');
         }
 
-        call_user_func($this->callback);
+        \call_user_func($this->callback);
 
         return $this;
     }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/File/UploadedFileTest.php b/src/Symfony/Component/HttpFoundation/Tests/File/UploadedFileTest.php
index 36f122fe7922..1a88d483505b 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/File/UploadedFileTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/File/UploadedFileTest.php
@@ -46,7 +46,7 @@ public function testFileUploadsWithNoMimeType()
 
         $this->assertEquals('application/octet-stream', $file->getClientMimeType());
 
-        if (extension_loaded('fileinfo')) {
+        if (\extension_loaded('fileinfo')) {
             $this->assertEquals('image/gif', $file->getMimeType());
         }
     }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/HeaderBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/HeaderBagTest.php
index 683ef47b276b..dc1d83f184b1 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/HeaderBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/HeaderBagTest.php
@@ -183,7 +183,7 @@ public function testGetIterator()
             $this->assertEquals(array($headers[$key]), $val);
         }
 
-        $this->assertEquals(count($headers), $i);
+        $this->assertEquals(\count($headers), $i);
     }
 
     public function testCount()
@@ -191,6 +191,6 @@ public function testCount()
         $headers = array('foo' => 'bar', 'HELLO' => 'WORLD');
         $headerBag = new HeaderBag($headers);
 
-        $this->assertCount(count($headers), $headerBag);
+        $this->assertCount(\count($headers), $headerBag);
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php b/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
index 7a93f9947262..232a2040ff63 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
@@ -47,7 +47,7 @@ public function getIpv4Data()
      */
     public function testIpv6($matches, $remoteAddr, $cidr)
     {
-        if (!defined('AF_INET6')) {
+        if (!\defined('AF_INET6')) {
             $this->markTestSkipped('Only works when PHP is compiled without the option "disable-ipv6".');
         }
 
@@ -78,7 +78,7 @@ public function getIpv6Data()
      */
     public function testAnIpv6WithOptionDisabledIpv6()
     {
-        if (defined('AF_INET6')) {
+        if (\defined('AF_INET6')) {
             $this->markTestSkipped('Only works when PHP is compiled with the option "disable-ipv6".');
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php
index 0559b5ba0ff8..03411166fc0f 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php
@@ -20,7 +20,7 @@ protected function setUp()
     {
         parent::setUp();
 
-        if (!defined('HHVM_VERSION')) {
+        if (!\defined('HHVM_VERSION')) {
             $this->iniSet('serialize_precision', 14);
         }
     }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ParameterBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/ParameterBagTest.php
index 87806b3f5757..fca221c34988 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ParameterBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ParameterBagTest.php
@@ -206,7 +206,7 @@ public function testGetIterator()
             $this->assertEquals($parameters[$key], $val);
         }
 
-        $this->assertEquals(count($parameters), $i);
+        $this->assertEquals(\count($parameters), $i);
     }
 
     public function testCount()
@@ -214,7 +214,7 @@ public function testCount()
         $parameters = array('foo' => 'bar', 'hello' => 'world');
         $bag = new ParameterBag($parameters);
 
-        $this->assertCount(count($parameters), $bag);
+        $this->assertCount(\count($parameters), $bag);
     }
 
     public function testGetBoolean()
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php
index ffd8eb354f15..881a68e98b3d 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php
@@ -899,7 +899,7 @@ protected function provideResponse()
      */
     public function ianaCodesReasonPhrasesProvider()
     {
-        if (!in_array('https', stream_get_wrappers(), true)) {
+        if (!\in_array('https', stream_get_wrappers(), true)) {
             $this->markTestSkipped('The "https" wrapper is not available');
         }
 
@@ -927,7 +927,7 @@ public function ianaCodesReasonPhrasesProvider()
             $value = $xpath->query('.//ns:value', $record)->item(0)->nodeValue;
             $description = $xpath->query('.//ns:description', $record)->item(0)->nodeValue;
 
-            if (in_array($description, array('Unassigned', '(Unused)'), true)) {
+            if (\in_array($description, array('Unassigned', '(Unused)'), true)) {
                 continue;
             }
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/AttributeBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/AttributeBagTest.php
index 724a0b984470..43644e23eab2 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/AttributeBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/AttributeBagTest.php
@@ -176,11 +176,11 @@ public function testGetIterator()
             ++$i;
         }
 
-        $this->assertEquals(count($this->array), $i);
+        $this->assertEquals(\count($this->array), $i);
     }
 
     public function testCount()
     {
-        $this->assertCount(count($this->array), $this->bag);
+        $this->assertCount(\count($this->array), $this->bag);
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php
index 3fe0122f4fd0..577ff1c4ef02 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php
@@ -171,7 +171,7 @@ public function testLegacyGetIterator()
             ++$i;
         }
 
-        $this->assertEquals(count($flashes), $i);
+        $this->assertEquals(\count($flashes), $i);
         $this->assertCount(0, $this->bag->all());
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/SessionTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/SessionTest.php
index fa93507a41aa..50a4129d6f25 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/SessionTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/SessionTest.php
@@ -206,7 +206,7 @@ public function testGetIterator()
             ++$i;
         }
 
-        $this->assertEquals(count($attributes), $i);
+        $this->assertEquals(\count($attributes), $i);
     }
 
     public function testGetCount()
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcacheSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcacheSessionHandlerTest.php
index 75be18befffa..0a6e26ee3f4d 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcacheSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcacheSessionHandlerTest.php
@@ -32,7 +32,7 @@ class MemcacheSessionHandlerTest extends TestCase
 
     protected function setUp()
     {
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             $this->markTestSkipped('PHPUnit_MockObject cannot mock the Memcache class on HHVM. See https://github.com/sebastianbergmann/phpunit-mock-objects/pull/289');
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php
index 2e7be359efcf..2a114801056c 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php
@@ -32,7 +32,7 @@ class MemcachedSessionHandlerTest extends TestCase
 
     protected function setUp()
     {
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             $this->markTestSkipped('PHPUnit_MockObject cannot mock the Memcached class on HHVM. See https://github.com/sebastianbergmann/phpunit-mock-objects/pull/289');
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php
index 8ea0c52a87d7..7fa516871a90 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php
@@ -31,11 +31,11 @@ protected function setUp()
     {
         parent::setUp();
 
-        if (extension_loaded('mongodb')) {
+        if (\extension_loaded('mongodb')) {
             if (!class_exists('MongoDB\Client')) {
                 $this->markTestSkipped('The mongodb/mongodb package is required.');
             }
-        } elseif (!extension_loaded('mongo')) {
+        } elseif (!\extension_loaded('mongo')) {
             $this->markTestSkipped('The Mongo or MongoDB extension is required.');
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PdoSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PdoSessionHandlerTest.php
index a9884c1c92ea..a34c2b2c7cb8 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PdoSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PdoSessionHandlerTest.php
@@ -136,7 +136,7 @@ public function testReadWriteReadWithNullByte()
 
     public function testReadConvertsStreamToString()
     {
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             $this->markTestSkipped('PHPUnit_MockObject cannot mock the PDOStatement class on HHVM. See https://github.com/sebastianbergmann/phpunit-mock-objects/pull/289');
         }
 
@@ -157,7 +157,7 @@ public function testReadConvertsStreamToString()
 
     public function testReadLockedConvertsStreamToString()
     {
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             $this->markTestSkipped('PHPUnit_MockObject cannot mock the PDOStatement class on HHVM. See https://github.com/sebastianbergmann/phpunit-mock-objects/pull/289');
         }
 
@@ -358,8 +358,8 @@ public function getAttribute($attribute)
 
     public function prepare($statement, $driverOptions = array())
     {
-        return is_callable($this->prepareResult)
-            ? call_user_func($this->prepareResult, $statement, $driverOptions)
+        return \is_callable($this->prepareResult)
+            ? \call_user_func($this->prepareResult, $statement, $driverOptions)
             : $this->prepareResult;
     }
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
index 529583c01aad..c1e3db4610c6 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
@@ -185,7 +185,7 @@ public function testCookieOptions()
 
     public function testSessionOptions()
     {
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             $this->markTestSkipped('HHVM is not handled in this test case.');
         }
 
diff --git a/src/Symfony/Component/HttpKernel/Bundle/Bundle.php b/src/Symfony/Component/HttpKernel/Bundle/Bundle.php
index 2aac43e93350..024754e05f6b 100644
--- a/src/Symfony/Component/HttpKernel/Bundle/Bundle.php
+++ b/src/Symfony/Component/HttpKernel/Bundle/Bundle.php
@@ -84,7 +84,7 @@ public function getContainerExtension()
 
             if (null !== $extension) {
                 if (!$extension instanceof ExtensionInterface) {
-                    throw new \LogicException(sprintf('Extension %s must implement Symfony\Component\DependencyInjection\Extension\ExtensionInterface.', get_class($extension)));
+                    throw new \LogicException(sprintf('Extension %s must implement Symfony\Component\DependencyInjection\Extension\ExtensionInterface.', \get_class($extension)));
                 }
 
                 // check naming convention
@@ -116,7 +116,7 @@ public function getContainerExtension()
      */
     public function getNamespace()
     {
-        $class = get_class($this);
+        $class = \get_class($this);
 
         return substr($class, 0, strrpos($class, '\\'));
     }
@@ -130,7 +130,7 @@ public function getPath()
     {
         if (null === $this->path) {
             $reflected = new \ReflectionObject($this);
-            $this->path = dirname($reflected->getFileName());
+            $this->path = \dirname($reflected->getFileName());
         }
 
         return $this->path;
@@ -156,7 +156,7 @@ final public function getName()
             return $this->name;
         }
 
-        $name = get_class($this);
+        $name = \get_class($this);
         $pos = strrpos($name, '\\');
 
         return $this->name = false === $pos ? $name : substr($name, $pos + 1);
diff --git a/src/Symfony/Component/HttpKernel/CacheWarmer/CacheWarmer.php b/src/Symfony/Component/HttpKernel/CacheWarmer/CacheWarmer.php
index dba35a639a46..52dc2ad2c3d8 100644
--- a/src/Symfony/Component/HttpKernel/CacheWarmer/CacheWarmer.php
+++ b/src/Symfony/Component/HttpKernel/CacheWarmer/CacheWarmer.php
@@ -20,7 +20,7 @@ abstract class CacheWarmer implements CacheWarmerInterface
 {
     protected function writeCacheFile($file, $content)
     {
-        $tmpFile = @tempnam(dirname($file), basename($file));
+        $tmpFile = @tempnam(\dirname($file), basename($file));
         if (false !== @file_put_contents($tmpFile, $content) && @rename($tmpFile, $file)) {
             @chmod($file, 0666 & ~umask());
 
diff --git a/src/Symfony/Component/HttpKernel/Client.php b/src/Symfony/Component/HttpKernel/Client.php
index c19b6ade76cc..63efc44f5184 100644
--- a/src/Symfony/Component/HttpKernel/Client.php
+++ b/src/Symfony/Component/HttpKernel/Client.php
@@ -76,7 +76,7 @@ protected function getScript($request)
 
         $r = new \ReflectionClass('\\Symfony\\Component\\ClassLoader\\ClassLoader');
         $requirePath = str_replace("'", "\\'", $r->getFileName());
-        $symfonyPath = str_replace("'", "\\'", dirname(dirname(dirname(__DIR__))));
+        $symfonyPath = str_replace("'", "\\'", \dirname(\dirname(\dirname(__DIR__))));
         $errorReporting = error_reporting();
 
         $code = <<<EOF
@@ -143,7 +143,7 @@ protected function filterFiles(array $files)
     {
         $filtered = array();
         foreach ($files as $key => $value) {
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 $filtered[$key] = $this->filterFiles($value);
             } elseif ($value instanceof UploadedFile) {
                 if ($value->isValid() && $value->getSize() > UploadedFile::getMaxFilesize()) {
diff --git a/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php b/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
index 8a3ea1b84068..8e547a4b156c 100644
--- a/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
+++ b/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
@@ -65,29 +65,29 @@ public function getController(Request $request)
             return false;
         }
 
-        if (is_array($controller)) {
+        if (\is_array($controller)) {
             return $controller;
         }
 
-        if (is_object($controller)) {
+        if (\is_object($controller)) {
             if (method_exists($controller, '__invoke')) {
                 return $controller;
             }
 
-            throw new \InvalidArgumentException(sprintf('Controller "%s" for URI "%s" is not callable.', get_class($controller), $request->getPathInfo()));
+            throw new \InvalidArgumentException(sprintf('Controller "%s" for URI "%s" is not callable.', \get_class($controller), $request->getPathInfo()));
         }
 
         if (false === strpos($controller, ':')) {
             if (method_exists($controller, '__invoke')) {
                 return $this->instantiateController($controller);
-            } elseif (function_exists($controller)) {
+            } elseif (\function_exists($controller)) {
                 return $controller;
             }
         }
 
         $callable = $this->createController($controller);
 
-        if (!is_callable($callable)) {
+        if (!\is_callable($callable)) {
             throw new \InvalidArgumentException(sprintf('Controller "%s" for URI "%s" is not callable.', $controller, $request->getPathInfo()));
         }
 
@@ -99,9 +99,9 @@ public function getController(Request $request)
      */
     public function getArguments(Request $request, $controller)
     {
-        if (is_array($controller)) {
+        if (\is_array($controller)) {
             $r = new \ReflectionMethod($controller[0], $controller[1]);
-        } elseif (is_object($controller) && !$controller instanceof \Closure) {
+        } elseif (\is_object($controller) && !$controller instanceof \Closure) {
             $r = new \ReflectionObject($controller);
             $r = $r->getMethod('__invoke');
         } else {
@@ -124,7 +124,7 @@ protected function doGetArguments(Request $request, $controller, array $paramete
         $arguments = array();
         foreach ($parameters as $param) {
             if (array_key_exists($param->name, $attributes)) {
-                if ($this->supportsVariadic && $param->isVariadic() && is_array($attributes[$param->name])) {
+                if ($this->supportsVariadic && $param->isVariadic() && \is_array($attributes[$param->name])) {
                     $arguments = array_merge($arguments, array_values($attributes[$param->name]));
                 } else {
                     $arguments[] = $attributes[$param->name];
@@ -136,10 +136,10 @@ protected function doGetArguments(Request $request, $controller, array $paramete
             } elseif ($this->supportsScalarTypes && $param->hasType() && $param->allowsNull()) {
                 $arguments[] = null;
             } else {
-                if (is_array($controller)) {
-                    $repr = sprintf('%s::%s()', get_class($controller[0]), $controller[1]);
-                } elseif (is_object($controller)) {
-                    $repr = get_class($controller);
+                if (\is_array($controller)) {
+                    $repr = sprintf('%s::%s()', \get_class($controller[0]), $controller[1]);
+                } elseif (\is_object($controller)) {
+                    $repr = \get_class($controller);
                 } else {
                     $repr = $controller;
                 }
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/ConfigDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/ConfigDataCollector.php
index 318c6522b42a..45046eda8aa4 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/ConfigDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/ConfigDataCollector.php
@@ -61,12 +61,12 @@ public function collect(Request $request, Response $response, \Exception $except
             'env' => isset($this->kernel) ? $this->kernel->getEnvironment() : 'n/a',
             'debug' => isset($this->kernel) ? $this->kernel->isDebug() : 'n/a',
             'php_version' => PHP_VERSION,
-            'xdebug_enabled' => extension_loaded('xdebug'),
-            'eaccel_enabled' => extension_loaded('eaccelerator') && ini_get('eaccelerator.enable'),
-            'apc_enabled' => extension_loaded('apc') && ini_get('apc.enabled'),
-            'xcache_enabled' => extension_loaded('xcache') && ini_get('xcache.cacher'),
-            'wincache_enabled' => extension_loaded('wincache') && ini_get('wincache.ocenabled'),
-            'zend_opcache_enabled' => extension_loaded('Zend OPcache') && ini_get('opcache.enable'),
+            'xdebug_enabled' => \extension_loaded('xdebug'),
+            'eaccel_enabled' => \extension_loaded('eaccelerator') && ini_get('eaccelerator.enable'),
+            'apc_enabled' => \extension_loaded('apc') && ini_get('apc.enabled'),
+            'xcache_enabled' => \extension_loaded('xcache') && ini_get('xcache.cacher'),
+            'wincache_enabled' => \extension_loaded('wincache') && ini_get('wincache.ocenabled'),
+            'zend_opcache_enabled' => \extension_loaded('Zend OPcache') && ini_get('opcache.enable'),
             'bundles' => array(),
             'sapi_name' => PHP_SAPI,
         );
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
index 27208ea6254b..5f57bed7f0a0 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
@@ -110,7 +110,7 @@ public function dump(Data $data)
                                 $src = explode("\n", $src);
                                 $fileExcerpt = array();
 
-                                for ($i = max($line - 3, 1), $max = min($line + 3, count($src)); $i <= $max; ++$i) {
+                                for ($i = max($line - 3, 1), $max = min($line + 3, \count($src)); $i <= $max; ++$i) {
                                     $fileExcerpt[] = '<li'.($i === $line ? ' class="selected"' : '').'><code>'.$this->htmlEncode($src[$i - 1]).'</code></li>';
                                 }
 
@@ -192,7 +192,7 @@ public function unserialize($data)
         parent::unserialize($data);
         $charset = array_pop($this->data);
         $fileLinkFormat = array_pop($this->data);
-        $this->dataCount = count($this->data);
+        $this->dataCount = \count($this->data);
         self::__construct($this->stopwatch, $fileLinkFormat, $charset);
     }
 
@@ -240,7 +240,7 @@ public function __destruct()
             $this->isCollected = true;
 
             $h = headers_list();
-            $i = count($h);
+            $i = \count($h);
             array_unshift($h, 'Content-Type: '.ini_get('default_mimetype'));
             while (0 !== stripos($h[$i], 'Content-Type:')) {
                 --$i;
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
index 0e4df12baa8d..150e74666499 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
@@ -155,7 +155,7 @@ private function sanitizeLogs($logs)
 
     private function sanitizeContext($context)
     {
-        if (is_array($context)) {
+        if (\is_array($context)) {
             foreach ($context as $key => $value) {
                 $context[$key] = $this->sanitizeContext($value);
             }
@@ -163,16 +163,16 @@ private function sanitizeContext($context)
             return $context;
         }
 
-        if (is_resource($context)) {
+        if (\is_resource($context)) {
             return sprintf('Resource(%s)', get_resource_type($context));
         }
 
-        if (is_object($context)) {
+        if (\is_object($context)) {
             if ($context instanceof \Exception) {
-                return sprintf('Exception(%s): %s', get_class($context), $context->getMessage());
+                return sprintf('Exception(%s): %s', \get_class($context), $context->getMessage());
             }
 
-            return sprintf('Object(%s)', get_class($context));
+            return sprintf('Object(%s)', \get_class($context));
         }
 
         return $context;
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/MemoryDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/MemoryDataCollector.php
index b7f61f46fd19..0d9b562c6043 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/MemoryDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/MemoryDataCollector.php
@@ -90,9 +90,9 @@ private function convertToBytes($memoryLimit)
         $memoryLimit = strtolower($memoryLimit);
         $max = strtolower(ltrim($memoryLimit, '+'));
         if (0 === strpos($max, '0x')) {
-            $max = intval($max, 16);
+            $max = \intval($max, 16);
         } elseif (0 === strpos($max, '0')) {
-            $max = intval($max, 8);
+            $max = \intval($max, 8);
         } else {
             $max = (int) $max;
         }
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php
index face98ffa858..b6e1613a64f9 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php
@@ -43,7 +43,7 @@ public function collect(Request $request, Response $response, \Exception $except
         // attributes are serialized and as they can be anything, they need to be converted to strings.
         $attributes = array();
         foreach ($request->attributes->all() as $key => $value) {
-            if ('_route' === $key && is_object($value)) {
+            if ('_route' === $key && \is_object($value)) {
                 $attributes[$key] = $this->varToString($value->getPath());
             } elseif ('_route_params' === $key) {
                 // we need to keep route params as an array (see getRouteParams())
@@ -114,7 +114,7 @@ public function collect(Request $request, Response $response, \Exception $except
         }
 
         foreach ($this->data as $key => $value) {
-            if (!is_array($value)) {
+            if (!\is_array($value)) {
                 continue;
             }
             if ('request_headers' === $key || 'response_headers' === $key) {
@@ -127,20 +127,20 @@ public function collect(Request $request, Response $response, \Exception $except
 
         if (isset($this->controllers[$request])) {
             $controller = $this->controllers[$request];
-            if (is_array($controller)) {
+            if (\is_array($controller)) {
                 try {
                     $r = new \ReflectionMethod($controller[0], $controller[1]);
                     $this->data['controller'] = array(
-                        'class' => is_object($controller[0]) ? get_class($controller[0]) : $controller[0],
+                        'class' => \is_object($controller[0]) ? \get_class($controller[0]) : $controller[0],
                         'method' => $controller[1],
                         'file' => $r->getFileName(),
                         'line' => $r->getStartLine(),
                     );
                 } catch (\ReflectionException $e) {
-                    if (is_callable($controller)) {
+                    if (\is_callable($controller)) {
                         // using __call or  __callStatic
                         $this->data['controller'] = array(
-                            'class' => is_object($controller[0]) ? get_class($controller[0]) : $controller[0],
+                            'class' => \is_object($controller[0]) ? \get_class($controller[0]) : $controller[0],
                             'method' => $controller[1],
                             'file' => 'n/a',
                             'line' => 'n/a',
@@ -155,7 +155,7 @@ public function collect(Request $request, Response $response, \Exception $except
                     'file' => $r->getFileName(),
                     'line' => $r->getStartLine(),
                 );
-            } elseif (is_object($controller)) {
+            } elseif (\is_object($controller)) {
                 $r = new \ReflectionClass($controller);
                 $this->data['controller'] = array(
                     'class' => $r->getName(),
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/Util/ValueExporter.php b/src/Symfony/Component/HttpKernel/DataCollector/Util/ValueExporter.php
index 324e8d65d91f..5eb505789c72 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/Util/ValueExporter.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/Util/ValueExporter.php
@@ -31,15 +31,15 @@ public function exportValue($value, $depth = 1, $deep = false)
             return sprintf('__PHP_Incomplete_Class(%s)', $this->getClassNameFromIncomplete($value));
         }
 
-        if (is_object($value)) {
+        if (\is_object($value)) {
             if ($value instanceof \DateTime || $value instanceof \DateTimeInterface) {
-                return sprintf('Object(%s) - %s', get_class($value), $value->format(\DateTime::ATOM));
+                return sprintf('Object(%s) - %s', \get_class($value), $value->format(\DateTime::ATOM));
             }
 
-            return sprintf('Object(%s)', get_class($value));
+            return sprintf('Object(%s)', \get_class($value));
         }
 
-        if (is_array($value)) {
+        if (\is_array($value)) {
             if (empty($value)) {
                 return '[]';
             }
@@ -48,7 +48,7 @@ public function exportValue($value, $depth = 1, $deep = false)
 
             $a = array();
             foreach ($value as $k => $v) {
-                if (is_array($v)) {
+                if (\is_array($v)) {
                     $deep = true;
                 }
                 $a[] = sprintf('%s => %s', $k, $this->exportValue($v, $depth + 1, $deep));
@@ -61,7 +61,7 @@ public function exportValue($value, $depth = 1, $deep = false)
             return sprintf('[%s]', implode(', ', $a));
         }
 
-        if (is_resource($value)) {
+        if (\is_resource($value)) {
             return sprintf('Resource(%s#%d)', get_resource_type($value), $value);
         }
 
diff --git a/src/Symfony/Component/HttpKernel/DependencyInjection/LazyLoadingFragmentHandler.php b/src/Symfony/Component/HttpKernel/DependencyInjection/LazyLoadingFragmentHandler.php
index b513816cc976..f13aec68349c 100644
--- a/src/Symfony/Component/HttpKernel/DependencyInjection/LazyLoadingFragmentHandler.php
+++ b/src/Symfony/Component/HttpKernel/DependencyInjection/LazyLoadingFragmentHandler.php
@@ -39,7 +39,7 @@ public function __construct(ContainerInterface $container, $requestStack = null,
         if ((null !== $requestStack && !$requestStack instanceof RequestStack) || $debug instanceof RequestStack) {
             $tmp = $debug;
             $debug = $requestStack;
-            $requestStack = func_num_args() < 3 ? null : $tmp;
+            $requestStack = \func_num_args() < 3 ? null : $tmp;
 
             @trigger_error('The '.__METHOD__.' method now requires a RequestStack to be given as second argument as '.__CLASS__.'::setRequest method will not be supported anymore in 3.0.', E_USER_DEPRECATED);
         } elseif (!$requestStack instanceof RequestStack) {
diff --git a/src/Symfony/Component/HttpKernel/DependencyInjection/MergeExtensionConfigurationPass.php b/src/Symfony/Component/HttpKernel/DependencyInjection/MergeExtensionConfigurationPass.php
index dcd73828de0b..1dbf7f7beeed 100644
--- a/src/Symfony/Component/HttpKernel/DependencyInjection/MergeExtensionConfigurationPass.php
+++ b/src/Symfony/Component/HttpKernel/DependencyInjection/MergeExtensionConfigurationPass.php
@@ -31,7 +31,7 @@ public function __construct(array $extensions)
     public function process(ContainerBuilder $container)
     {
         foreach ($this->extensions as $extension) {
-            if (!count($container->getExtensionConfig($extension))) {
+            if (!\count($container->getExtensionConfig($extension))) {
                 $container->loadFromExtension($extension, array());
             }
         }
diff --git a/src/Symfony/Component/HttpKernel/Event/FilterControllerEvent.php b/src/Symfony/Component/HttpKernel/Event/FilterControllerEvent.php
index 1da23b7017de..19831faf02be 100644
--- a/src/Symfony/Component/HttpKernel/Event/FilterControllerEvent.php
+++ b/src/Symfony/Component/HttpKernel/Event/FilterControllerEvent.php
@@ -56,7 +56,7 @@ public function getController()
     public function setController($controller)
     {
         // controller must be a callable
-        if (!is_callable($controller)) {
+        if (!\is_callable($controller)) {
             throw new \LogicException(sprintf('The controller must be a callable (%s given).', $this->varToString($controller)));
         }
 
@@ -65,11 +65,11 @@ public function setController($controller)
 
     private function varToString($var)
     {
-        if (is_object($var)) {
-            return sprintf('Object(%s)', get_class($var));
+        if (\is_object($var)) {
+            return sprintf('Object(%s)', \get_class($var));
         }
 
-        if (is_array($var)) {
+        if (\is_array($var)) {
             $a = array();
             foreach ($var as $k => $v) {
                 $a[] = sprintf('%s => %s', $k, $this->varToString($v));
@@ -78,7 +78,7 @@ private function varToString($var)
             return sprintf('Array(%s)', implode(', ', $a));
         }
 
-        if (is_resource($var)) {
+        if (\is_resource($var)) {
             return sprintf('Resource(%s)', get_resource_type($var));
         }
 
diff --git a/src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php b/src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php
index b560e24d725a..c0c68bc80624 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php
@@ -67,14 +67,14 @@ public function configure(Event $event = null)
         $this->firstCall = $this->hasTerminatedWithException = false;
 
         $handler = set_exception_handler('var_dump');
-        $handler = is_array($handler) ? $handler[0] : null;
+        $handler = \is_array($handler) ? $handler[0] : null;
         restore_exception_handler();
 
         if ($this->logger || null !== $this->throwAt) {
             if ($handler instanceof ErrorHandler) {
                 if ($this->logger) {
                     $handler->setDefaultLogger($this->logger, $this->levels);
-                    if (is_array($this->levels)) {
+                    if (\is_array($this->levels)) {
                         $scream = 0;
                         foreach ($this->levels as $type => $log) {
                             $scream |= $type;
@@ -118,7 +118,7 @@ public function configure(Event $event = null)
         if ($this->exceptionHandler) {
             if ($handler instanceof ErrorHandler) {
                 $h = $handler->setExceptionHandler('var_dump');
-                if (is_array($h) && $h[0] instanceof ExceptionHandler) {
+                if (\is_array($h) && $h[0] instanceof ExceptionHandler) {
                     $handler->setExceptionHandler($h);
                     $handler = $h[0];
                 } else {
@@ -139,7 +139,7 @@ public static function getSubscribedEvents()
     {
         $events = array(KernelEvents::REQUEST => array('configure', 2048));
 
-        if (defined('Symfony\Component\Console\ConsoleEvents::COMMAND')) {
+        if (\defined('Symfony\Component\Console\ConsoleEvents::COMMAND')) {
             $events[ConsoleEvents::COMMAND] = array('configure', 2048);
         }
 
diff --git a/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php b/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
index 32d0a130ffd0..fa23e06bb1ff 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
@@ -45,16 +45,16 @@ public function onKernelException(GetResponseForExceptionEvent $event)
     {
         $exception = $event->getException();
         $request = $event->getRequest();
-        $eventDispatcher = func_num_args() > 2 ? func_get_arg(2) : null;
+        $eventDispatcher = \func_num_args() > 2 ? func_get_arg(2) : null;
 
-        $this->logException($exception, sprintf('Uncaught PHP Exception %s: "%s" at %s line %s', get_class($exception), $exception->getMessage(), $exception->getFile(), $exception->getLine()));
+        $this->logException($exception, sprintf('Uncaught PHP Exception %s: "%s" at %s line %s', \get_class($exception), $exception->getMessage(), $exception->getFile(), $exception->getLine()));
 
         $request = $this->duplicateRequest($exception, $request);
 
         try {
             $response = $event->getKernel()->handle($request, HttpKernelInterface::SUB_REQUEST, false);
         } catch (\Exception $e) {
-            $this->logException($e, sprintf('Exception thrown when handling an exception (%s: %s at %s line %s)', get_class($e), $e->getMessage(), $e->getFile(), $e->getLine()));
+            $this->logException($e, sprintf('Exception thrown when handling an exception (%s: %s at %s line %s)', \get_class($e), $e->getMessage(), $e->getFile(), $e->getLine()));
 
             $wrapper = $e;
 
diff --git a/src/Symfony/Component/HttpKernel/EventListener/LocaleListener.php b/src/Symfony/Component/HttpKernel/EventListener/LocaleListener.php
index 8d389150b03c..36ef263075ba 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/LocaleListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/LocaleListener.php
@@ -48,9 +48,9 @@ public function __construct($requestStack = null, $defaultLocale = 'en', $router
     {
         if ((null !== $requestStack && !$requestStack instanceof RequestStack) || $defaultLocale instanceof RequestContextAwareInterface || $router instanceof RequestStack) {
             $tmp = $router;
-            $router = func_num_args() < 2 ? null : $defaultLocale;
+            $router = \func_num_args() < 2 ? null : $defaultLocale;
             $defaultLocale = $requestStack;
-            $requestStack = func_num_args() < 3 ? null : $tmp;
+            $requestStack = \func_num_args() < 3 ? null : $tmp;
 
             @trigger_error('The '.__METHOD__.' method now requires a RequestStack to be given as first argument as '.__CLASS__.'::setRequest method will not be supported anymore in 3.0.', E_USER_DEPRECATED);
         } elseif (!$requestStack instanceof RequestStack) {
diff --git a/src/Symfony/Component/HttpKernel/EventListener/ProfilerListener.php b/src/Symfony/Component/HttpKernel/EventListener/ProfilerListener.php
index c7a0e9cd37a7..cb634e820478 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/ProfilerListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/ProfilerListener.php
@@ -52,7 +52,7 @@ public function __construct(Profiler $profiler, $requestStack = null, $matcher =
             $onlyMasterRequests = $onlyException;
             $onlyException = $matcher;
             $matcher = $requestStack;
-            $requestStack = func_num_args() < 5 ? null : $tmp;
+            $requestStack = \func_num_args() < 5 ? null : $tmp;
 
             @trigger_error('The '.__METHOD__.' method now requires a RequestStack to be given as second argument as '.__CLASS__.'::onKernelRequest method will be removed in 3.0.', E_USER_DEPRECATED);
         } elseif (!$requestStack instanceof RequestStack) {
diff --git a/src/Symfony/Component/HttpKernel/Fragment/AbstractSurrogateFragmentRenderer.php b/src/Symfony/Component/HttpKernel/Fragment/AbstractSurrogateFragmentRenderer.php
index 07eda6f1c1c0..65474aa4907e 100644
--- a/src/Symfony/Component/HttpKernel/Fragment/AbstractSurrogateFragmentRenderer.php
+++ b/src/Symfony/Component/HttpKernel/Fragment/AbstractSurrogateFragmentRenderer.php
@@ -88,6 +88,6 @@ private function generateSignedFragmentUri($uri, Request $request)
         // we need to sign the absolute URI, but want to return the path only.
         $fragmentUri = $this->signer->sign($this->generateFragmentUri($uri, $request, true));
 
-        return substr($fragmentUri, strlen($request->getSchemeAndHttpHost()));
+        return substr($fragmentUri, \strlen($request->getSchemeAndHttpHost()));
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/Fragment/FragmentHandler.php b/src/Symfony/Component/HttpKernel/Fragment/FragmentHandler.php
index 34bf121bd9fa..0a7ed907ebb3 100644
--- a/src/Symfony/Component/HttpKernel/Fragment/FragmentHandler.php
+++ b/src/Symfony/Component/HttpKernel/Fragment/FragmentHandler.php
@@ -48,11 +48,11 @@ class FragmentHandler
      */
     public function __construct($requestStack = null, $renderers = array(), $debug = false)
     {
-        if (is_array($requestStack)) {
+        if (\is_array($requestStack)) {
             $tmp = $debug;
-            $debug = func_num_args() < 2 ? false : $renderers;
+            $debug = \func_num_args() < 2 ? false : $renderers;
             $renderers = $requestStack;
-            $requestStack = func_num_args() < 3 ? null : $tmp;
+            $requestStack = \func_num_args() < 3 ? null : $tmp;
 
             @trigger_error('The '.__METHOD__.' method now requires a RequestStack to be given as first argument as '.__CLASS__.'::setRequest method will not be supported anymore in 3.0.', E_USER_DEPRECATED);
         } elseif (!$requestStack instanceof RequestStack) {
@@ -62,7 +62,7 @@ public function __construct($requestStack = null, $renderers = array(), $debug =
         if (null !== $requestStack && !$requestStack instanceof RequestStack) {
             throw new \InvalidArgumentException('RequestStack instance expected.');
         }
-        if (!is_array($renderers)) {
+        if (!\is_array($renderers)) {
             throw new \InvalidArgumentException('Renderers must be an array.');
         }
 
diff --git a/src/Symfony/Component/HttpKernel/Fragment/HIncludeFragmentRenderer.php b/src/Symfony/Component/HttpKernel/Fragment/HIncludeFragmentRenderer.php
index 4ee89d6e8c05..191f729b2c09 100644
--- a/src/Symfony/Component/HttpKernel/Fragment/HIncludeFragmentRenderer.php
+++ b/src/Symfony/Component/HttpKernel/Fragment/HIncludeFragmentRenderer.php
@@ -89,7 +89,7 @@ public function render($uri, Request $request, array $options = array())
             }
 
             // we need to sign the absolute URI, but want to return the path only.
-            $uri = substr($this->signer->sign($this->generateFragmentUri($uri, $request, true)), strlen($request->getSchemeAndHttpHost()));
+            $uri = substr($this->signer->sign($this->generateFragmentUri($uri, $request, true)), \strlen($request->getSchemeAndHttpHost()));
         }
 
         // We need to replace ampersands in the URI with the encoded form in order to return valid html/xml content.
@@ -102,12 +102,12 @@ public function render($uri, Request $request, array $options = array())
             $content = $template;
         }
 
-        $attributes = isset($options['attributes']) && is_array($options['attributes']) ? $options['attributes'] : array();
+        $attributes = isset($options['attributes']) && \is_array($options['attributes']) ? $options['attributes'] : array();
         if (isset($options['id']) && $options['id']) {
             $attributes['id'] = $options['id'];
         }
         $renderedAttributes = '';
-        if (count($attributes) > 0) {
+        if (\count($attributes) > 0) {
             if (\PHP_VERSION_ID >= 50400) {
                 $flags = ENT_QUOTES | ENT_SUBSTITUTE;
             } else {
diff --git a/src/Symfony/Component/HttpKernel/Fragment/RoutableFragmentRenderer.php b/src/Symfony/Component/HttpKernel/Fragment/RoutableFragmentRenderer.php
index d7eeb89a6bef..087995f2909f 100644
--- a/src/Symfony/Component/HttpKernel/Fragment/RoutableFragmentRenderer.php
+++ b/src/Symfony/Component/HttpKernel/Fragment/RoutableFragmentRenderer.php
@@ -80,7 +80,7 @@ protected function generateFragmentUri(ControllerReference $reference, Request $
     private function checkNonScalar($values)
     {
         foreach ($values as $key => $value) {
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 $this->checkNonScalar($value);
             } elseif (!is_scalar($value) && null !== $value) {
                 throw new \LogicException(sprintf('Controller attributes cannot contain non-scalar/non-null values (value for key "%s" is not a scalar or null).', $key));
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/Esi.php b/src/Symfony/Component/HttpKernel/HttpCache/Esi.php
index 02db7ce67236..d49c63c55006 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/Esi.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/Esi.php
@@ -193,7 +193,7 @@ public function process(Request $request, Response $response)
         }
 
         $parts = explode(';', $type);
-        if (!in_array($parts[0], $this->contentTypes)) {
+        if (!\in_array($parts[0], $this->contentTypes)) {
             return $response;
         }
 
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/HttpCache.php b/src/Symfony/Component/HttpKernel/HttpCache/HttpCache.php
index 6f467876989b..5f3acf1bebf5 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/HttpCache.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/HttpCache.php
@@ -396,7 +396,7 @@ protected function validate(Request $request, Response $entry, $catch = false)
 
             // return the response and not the cache entry if the response is valid but not cached
             $etag = $response->getEtag();
-            if ($etag && in_array($etag, $requestEtags) && !in_array($etag, $cachedEtags)) {
+            if ($etag && \in_array($etag, $requestEtags) && !\in_array($etag, $cachedEtags)) {
                 return $response;
             }
 
@@ -481,7 +481,7 @@ protected function forward(Request $request, $catch = false, Response $entry = n
         $request->server->set('REMOTE_ADDR', '127.0.0.1');
 
         // make sure HttpCache is a trusted proxy
-        if (!in_array('127.0.0.1', $trustedProxies = Request::getTrustedProxies())) {
+        if (!\in_array('127.0.0.1', $trustedProxies = Request::getTrustedProxies())) {
             $trustedProxies[] = '127.0.0.1';
             Request::setTrustedProxies($trustedProxies);
         }
@@ -491,7 +491,7 @@ protected function forward(Request $request, $catch = false, Response $entry = n
         // FIXME: we probably need to also catch exceptions if raw === true
 
         // we don't implement the stale-if-error on Requests, which is nonetheless part of the RFC
-        if (null !== $entry && in_array($response->getStatusCode(), array(500, 502, 503, 504))) {
+        if (null !== $entry && \in_array($response->getStatusCode(), array(500, 502, 503, 504))) {
             if (null === $age = $entry->headers->getCacheControlDirective('stale-if-error')) {
                 $age = $this->options['stale_if_error'];
             }
@@ -632,7 +632,7 @@ private function restoreResponseBody(Request $request, Response $response)
             $response->setContent(ob_get_clean());
             $response->headers->remove('X-Body-Eval');
             if (!$response->headers->has('Transfer-Encoding')) {
-                $response->headers->set('Content-Length', strlen($response->getContent()));
+                $response->headers->set('Content-Length', \strlen($response->getContent()));
             }
         } elseif ($response->headers->has('X-Body-File')) {
             // Response does not include possibly dynamic content (ESI, SSI), so we need
@@ -666,7 +666,7 @@ private function isPrivateRequest(Request $request)
             $key = strtolower(str_replace('HTTP_', '', $key));
 
             if ('cookie' === $key) {
-                if (count($request->cookies->all())) {
+                if (\count($request->cookies->all())) {
                     return true;
                 }
             } elseif ($request->headers->has($key)) {
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/Ssi.php b/src/Symfony/Component/HttpKernel/HttpCache/Ssi.php
index e7a70c19a23e..73067672b384 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/Ssi.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/Ssi.php
@@ -117,7 +117,7 @@ public function process(Request $request, Response $response)
         }
 
         $parts = explode(';', $type);
-        if (!in_array($parts[0], $this->contentTypes)) {
+        if (!\in_array($parts[0], $this->contentTypes)) {
             return $response;
         }
 
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/Store.php b/src/Symfony/Component/HttpKernel/HttpCache/Store.php
index d20bfaa1b0c4..fcdd7fa5e6a5 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/Store.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/Store.php
@@ -68,7 +68,7 @@ public function lock(Request $request)
 
         if (!isset($this->locks[$key])) {
             $path = $this->getPath($key);
-            if (!file_exists(dirname($path)) && false === @mkdir(dirname($path), 0777, true) && !is_dir(dirname($path))) {
+            if (!file_exists(\dirname($path)) && false === @mkdir(\dirname($path), 0777, true) && !is_dir(\dirname($path))) {
                 return $path;
             }
             $h = fopen($path, 'cb');
@@ -187,7 +187,7 @@ public function write(Request $request, Response $response)
             $response->headers->set('X-Content-Digest', $digest);
 
             if (!$response->headers->has('Transfer-Encoding')) {
-                $response->headers->set('Content-Length', strlen($response->getContent()));
+                $response->headers->set('Content-Length', \strlen($response->getContent()));
             }
         }
 
@@ -375,17 +375,17 @@ private function save($key, $data)
             @ftruncate($fp, 0);
             @fseek($fp, 0);
             $len = @fwrite($fp, $data);
-            if (strlen($data) !== $len) {
+            if (\strlen($data) !== $len) {
                 @ftruncate($fp, 0);
 
                 return false;
             }
         } else {
-            if (!file_exists(dirname($path)) && false === @mkdir(dirname($path), 0777, true) && !is_dir(dirname($path))) {
+            if (!file_exists(\dirname($path)) && false === @mkdir(\dirname($path), 0777, true) && !is_dir(\dirname($path))) {
                 return false;
             }
 
-            $tmpFile = tempnam(dirname($path), basename($path));
+            $tmpFile = tempnam(\dirname($path), basename($path));
             if (false === $fp = @fopen($tmpFile, 'wb')) {
                 @unlink($tmpFile);
 
diff --git a/src/Symfony/Component/HttpKernel/HttpKernel.php b/src/Symfony/Component/HttpKernel/HttpKernel.php
index 60c000f03063..8331d8a6c1ca 100644
--- a/src/Symfony/Component/HttpKernel/HttpKernel.php
+++ b/src/Symfony/Component/HttpKernel/HttpKernel.php
@@ -247,11 +247,11 @@ private function handleException(\Exception $e, $request, $type)
 
     private function varToString($var)
     {
-        if (is_object($var)) {
-            return sprintf('Object(%s)', get_class($var));
+        if (\is_object($var)) {
+            return sprintf('Object(%s)', \get_class($var));
         }
 
-        if (is_array($var)) {
+        if (\is_array($var)) {
             $a = array();
             foreach ($var as $k => $v) {
                 $a[] = sprintf('%s => %s', $k, $this->varToString($v));
@@ -260,7 +260,7 @@ private function varToString($var)
             return sprintf('Array(%s)', implode(', ', $a));
         }
 
-        if (is_resource($var)) {
+        if (\is_resource($var)) {
             return sprintf('Resource(%s)', get_resource_type($var));
         }
 
diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php
index 70735892ffe9..1df4c2eddc83 100644
--- a/src/Symfony/Component/HttpKernel/Kernel.php
+++ b/src/Symfony/Component/HttpKernel/Kernel.php
@@ -225,7 +225,7 @@ public function isClassInActiveBundle($class)
     public function getBundle($name, $first = true)
     {
         if (!isset($this->bundleMap[$name])) {
-            throw new \InvalidArgumentException(sprintf('Bundle "%s" does not exist or it is not enabled. Maybe you forgot to add it in the registerBundles() method of your %s.php file?', $name, get_class($this)));
+            throw new \InvalidArgumentException(sprintf('Bundle "%s" does not exist or it is not enabled. Maybe you forgot to add it in the registerBundles() method of your %s.php file?', $name, \get_class($this)));
         }
 
         if (true === $first) {
@@ -287,7 +287,7 @@ public function locateResource($name, $dir = null, $first = true)
             }
         }
 
-        if (count($files) > 0) {
+        if (\count($files) > 0) {
             return $first && $isResource ? $files[0] : $files;
         }
 
@@ -332,7 +332,7 @@ public function getRootDir()
     {
         if (null === $this->rootDir) {
             $r = new \ReflectionObject($this);
-            $this->rootDir = dirname($r->getFileName());
+            $this->rootDir = \dirname($r->getFileName());
         }
 
         return $this->rootDir;
@@ -449,7 +449,7 @@ protected function initializeBundles()
         }
 
         // look for orphans
-        if (!empty($directChildren) && count($diff = array_diff_key($directChildren, $this->bundles))) {
+        if (!empty($directChildren) && \count($diff = array_diff_key($directChildren, $this->bundles))) {
             $diff = array_keys($diff);
 
             throw new \LogicException(sprintf('Bundle "%s" extends bundle "%s", which is not registered.', $directChildren[$diff[0]], $diff[0]));
@@ -536,7 +536,7 @@ protected function getKernelParameters()
         $bundlesMetadata = array();
 
         foreach ($this->bundles as $name => $bundle) {
-            $bundles[$name] = get_class($bundle);
+            $bundles[$name] = \get_class($bundle);
             $bundlesMetadata[$name] = array(
                 'parent' => $bundle->getParent(),
                 'path' => $bundle->getPath(),
@@ -707,7 +707,7 @@ protected function getContainerLoader(ContainerInterface $container)
      */
     public static function stripComments($source)
     {
-        if (!function_exists('token_get_all')) {
+        if (!\function_exists('token_get_all')) {
             return $source;
         }
 
@@ -735,7 +735,7 @@ public static function stripComments($source)
 
                 // replace multiple new lines with a single newline
                 $rawChunk .= preg_replace(array('/\n{2,}/S'), "\n", $token[1]);
-            } elseif (in_array($token[0], array(T_COMMENT, T_DOC_COMMENT))) {
+            } elseif (\in_array($token[0], array(T_COMMENT, T_DOC_COMMENT))) {
                 $ignoreSpace = true;
             } else {
                 $rawChunk .= $token[1];
diff --git a/src/Symfony/Component/HttpKernel/Profiler/BaseMemcacheProfilerStorage.php b/src/Symfony/Component/HttpKernel/Profiler/BaseMemcacheProfilerStorage.php
index 70f3dbcc043f..d990e98a46de 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/BaseMemcacheProfilerStorage.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/BaseMemcacheProfilerStorage.php
@@ -302,7 +302,7 @@ private function getIndexName()
 
     private function isItemNameValid($name)
     {
-        $length = strlen($name);
+        $length = \strlen($name);
 
         if ($length > 250) {
             throw new \RuntimeException(sprintf('The memcache item key "%s" is too long (%s bytes). Allowed maximum size is 250 bytes.', $name, $length));
diff --git a/src/Symfony/Component/HttpKernel/Profiler/FileProfilerStorage.php b/src/Symfony/Component/HttpKernel/Profiler/FileProfilerStorage.php
index 045058991063..0d7e3955c636 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/FileProfilerStorage.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/FileProfilerStorage.php
@@ -61,7 +61,7 @@ public function find($ip, $url, $limit, $method, $start = null, $end = null)
         fseek($file, 0, SEEK_END);
 
         $result = array();
-        while (count($result) < $limit && $line = $this->readLineFromFile($file)) {
+        while (\count($result) < $limit && $line = $this->readLineFromFile($file)) {
             $values = str_getcsv($line);
             list($csvToken, $csvIp, $csvMethod, $csvUrl, $csvTime, $csvParent) = $values;
             $csvStatusCode = isset($values[6]) ? $values[6] : null;
@@ -138,7 +138,7 @@ public function write(Profile $profile)
         $profileIndexed = is_file($file);
         if (!$profileIndexed) {
             // Create directory
-            $dir = dirname($file);
+            $dir = \dirname($file);
             if (!is_dir($dir) && false === @mkdir($dir, 0777, true) && !is_dir($dir)) {
                 throw new \RuntimeException(sprintf('Unable to create the storage directory (%s).', $dir));
             }
diff --git a/src/Symfony/Component/HttpKernel/Profiler/MysqlProfilerStorage.php b/src/Symfony/Component/HttpKernel/Profiler/MysqlProfilerStorage.php
index 45d9cfffbbb7..086aa8741637 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/MysqlProfilerStorage.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/MysqlProfilerStorage.php
@@ -33,7 +33,7 @@ protected function initDb()
                 throw new \RuntimeException(sprintf('Please check your configuration. You are trying to use Mysql with an invalid dsn "%s". The expected format is "mysql:dbname=database_name;host=host_name".', $this->dsn));
             }
 
-            if (!class_exists('PDO') || !in_array('mysql', \PDO::getAvailableDrivers(), true)) {
+            if (!class_exists('PDO') || !\in_array('mysql', \PDO::getAvailableDrivers(), true)) {
                 throw new \RuntimeException('You need to enable PDO_Mysql extension for the profiler to run properly.');
             }
 
diff --git a/src/Symfony/Component/HttpKernel/Profiler/PdoProfilerStorage.php b/src/Symfony/Component/HttpKernel/Profiler/PdoProfilerStorage.php
index 700607e4c9a3..e5f8bc72fcfe 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/PdoProfilerStorage.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/PdoProfilerStorage.php
@@ -160,7 +160,7 @@ protected function exec($db, $query, array $args = array())
         $stmt = $this->prepareStatement($db, $query);
 
         foreach ($args as $arg => $val) {
-            $stmt->bindValue($arg, $val, is_int($val) ? \PDO::PARAM_INT : \PDO::PARAM_STR);
+            $stmt->bindValue($arg, $val, \is_int($val) ? \PDO::PARAM_INT : \PDO::PARAM_STR);
         }
         $success = $stmt->execute();
         if (!$success) {
@@ -188,7 +188,7 @@ protected function fetch($db, $query, array $args = array())
         $stmt = $this->prepareStatement($db, $query);
 
         foreach ($args as $arg => $val) {
-            $stmt->bindValue($arg, $val, is_int($val) ? \PDO::PARAM_INT : \PDO::PARAM_STR);
+            $stmt->bindValue($arg, $val, \is_int($val) ? \PDO::PARAM_INT : \PDO::PARAM_STR);
         }
         $stmt->execute();
 
diff --git a/src/Symfony/Component/HttpKernel/Profiler/Profiler.php b/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
index 0faf005ce159..7919203a672b 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
@@ -102,7 +102,7 @@ public function saveProfile(Profile $profile)
         }
 
         if (!($ret = $this->storage->write($profile)) && null !== $this->logger) {
-            $this->logger->warning('Unable to store the profiler information.', array('configured_storage' => get_class($this->storage)));
+            $this->logger->warning('Unable to store the profiler information.', array('configured_storage' => \get_class($this->storage)));
         }
 
         return $ret;
diff --git a/src/Symfony/Component/HttpKernel/Profiler/RedisProfilerStorage.php b/src/Symfony/Component/HttpKernel/Profiler/RedisProfilerStorage.php
index e5aa93da8d82..6d3d9676caff 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/RedisProfilerStorage.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/RedisProfilerStorage.php
@@ -216,7 +216,7 @@ protected function getRedis()
                 throw new \RuntimeException(sprintf('Please check your configuration. You are trying to use Redis with an invalid dsn "%s". The minimal expected format is "redis://[host]:port".', $this->dsn));
             }
 
-            if (!extension_loaded('redis')) {
+            if (!\extension_loaded('redis')) {
                 throw new \RuntimeException('RedisProfilerStorage requires that the redis extension is loaded.');
             }
 
@@ -317,7 +317,7 @@ private function getIndexName()
 
     private function isItemNameValid($name)
     {
-        $length = strlen($name);
+        $length = \strlen($name);
 
         if ($length > 2147483648) {
             throw new \RuntimeException(sprintf('The Redis item key "%s" is too long (%s bytes). Allowed maximum size is 2^31 bytes.', $name, $length));
diff --git a/src/Symfony/Component/HttpKernel/Profiler/SqliteProfilerStorage.php b/src/Symfony/Component/HttpKernel/Profiler/SqliteProfilerStorage.php
index 7f3d9baa5099..549c27e1b331 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/SqliteProfilerStorage.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/SqliteProfilerStorage.php
@@ -33,12 +33,12 @@ protected function initDb()
                 throw new \RuntimeException(sprintf('Please check your configuration. You are trying to use Sqlite with an invalid dsn "%s". The expected format is "sqlite:/path/to/the/db/file".', $this->dsn));
             }
             if (class_exists('SQLite3')) {
-                $db = new \SQLite3(substr($this->dsn, 7, strlen($this->dsn)), \SQLITE3_OPEN_READWRITE | \SQLITE3_OPEN_CREATE);
+                $db = new \SQLite3(substr($this->dsn, 7, \strlen($this->dsn)), \SQLITE3_OPEN_READWRITE | \SQLITE3_OPEN_CREATE);
                 if (method_exists($db, 'busyTimeout')) {
                     // busyTimeout only exists for PHP >= 5.3.3
                     $db->busyTimeout(1000);
                 }
-            } elseif (class_exists('PDO') && in_array('sqlite', \PDO::getAvailableDrivers(), true)) {
+            } elseif (class_exists('PDO') && \in_array('sqlite', \PDO::getAvailableDrivers(), true)) {
                 $db = new \PDO($this->dsn);
             } else {
                 throw new \RuntimeException('You need to enable either the SQLite3 or PDO_SQLite extension for the profiler to run properly.');
@@ -64,7 +64,7 @@ protected function exec($db, $query, array $args = array())
         if ($db instanceof \SQLite3) {
             $stmt = $this->prepareStatement($db, $query);
             foreach ($args as $arg => $val) {
-                $stmt->bindValue($arg, $val, is_int($val) ? \SQLITE3_INTEGER : \SQLITE3_TEXT);
+                $stmt->bindValue($arg, $val, \is_int($val) ? \SQLITE3_INTEGER : \SQLITE3_TEXT);
             }
 
             $res = $stmt->execute();
@@ -84,7 +84,7 @@ protected function fetch($db, $query, array $args = array())
         if ($db instanceof \SQLite3) {
             $stmt = $this->prepareStatement($db, $query);
             foreach ($args as $arg => $val) {
-                $stmt->bindValue($arg, $val, is_int($val) ? \SQLITE3_INTEGER : \SQLITE3_TEXT);
+                $stmt->bindValue($arg, $val, \is_int($val) ? \SQLITE3_INTEGER : \SQLITE3_TEXT);
             }
             $res = $stmt->execute();
             while ($row = $res->fetchArray(\SQLITE3_ASSOC)) {
diff --git a/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerTest.php b/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerTest.php
index 05666cb0dcdc..4d34e7bfc90e 100644
--- a/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerTest.php
@@ -31,7 +31,7 @@ public static function tearDownAfterClass()
     public function testWriteCacheFileCreatesTheFile()
     {
         $warmer = new TestCacheWarmer(self::$cacheFile);
-        $warmer->warmUp(dirname(self::$cacheFile));
+        $warmer->warmUp(\dirname(self::$cacheFile));
 
         $this->assertFileExists(self::$cacheFile);
     }
@@ -43,7 +43,7 @@ public function testWriteNonWritableCacheFileThrowsARuntimeException()
     {
         $nonWritableFile = '/this/file/is/very/probably/not/writable';
         $warmer = new TestCacheWarmer($nonWritableFile);
-        $warmer->warmUp(dirname($nonWritableFile));
+        $warmer->warmUp(\dirname($nonWritableFile));
     }
 }
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/ClientTest.php b/src/Symfony/Component/HttpKernel/Tests/ClientTest.php
index ac3ea1e860af..158484d97b60 100644
--- a/src/Symfony/Component/HttpKernel/Tests/ClientTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/ClientTest.php
@@ -121,7 +121,7 @@ public function testUploadedFile()
             $this->assertTrue($file->isValid());
         }
 
-        $file->move(dirname($target), basename($target));
+        $file->move(\dirname($target), basename($target));
 
         $this->assertFileExists($target);
         unlink($target);
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/ConfigDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/ConfigDataCollectorTest.php
index 6d9f65d0ac6e..50aa38863102 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/ConfigDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/ConfigDataCollectorTest.php
@@ -36,22 +36,22 @@ public function testCollect()
         $this->assertNull($c->getToken());
 
         // if else clause because we don't know it
-        if (extension_loaded('xdebug')) {
+        if (\extension_loaded('xdebug')) {
             $this->assertTrue($c->hasXDebug());
         } else {
             $this->assertFalse($c->hasXDebug());
         }
 
         // if else clause because we don't know it
-        if (((extension_loaded('eaccelerator') && ini_get('eaccelerator.enable'))
+        if (((\extension_loaded('eaccelerator') && ini_get('eaccelerator.enable'))
                 ||
-                (extension_loaded('apc') && ini_get('apc.enabled'))
+                (\extension_loaded('apc') && ini_get('apc.enabled'))
                 ||
-                (extension_loaded('Zend OPcache') && ini_get('opcache.enable'))
+                (\extension_loaded('Zend OPcache') && ini_get('opcache.enable'))
                 ||
-                (extension_loaded('xcache') && ini_get('xcache.cacher'))
+                (\extension_loaded('xcache') && ini_get('xcache.cacher'))
                 ||
-                (extension_loaded('wincache') && ini_get('wincache.ocenabled')))) {
+                (\extension_loaded('wincache') && ini_get('wincache.ocenabled')))) {
             $this->assertTrue($c->hasAccelerator());
         } else {
             $this->assertFalse($c->hasAccelerator());
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/DumpDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/DumpDataCollectorTest.php
index 4c7cd9a51c0e..3b57168a52b1 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/DumpDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/DumpDataCollectorTest.php
@@ -94,7 +94,7 @@ public function testCollectHtml()
 </pre>
 EOTXT;
         } else {
-            $len = strlen("DumpDataCollectorTest.php on line {$line}:");
+            $len = \strlen("DumpDataCollectorTest.php on line {$line}:");
             $xOutput = <<<EOTXT
 <pre class=sf-dump id=sf-dump data-indent-pad="  ">"<span class=sf-dump-str title="{$len} characters">DumpDataCollectorTest.php on line {$line}:</span>"
 </pre>
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/ExceptionListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/ExceptionListenerTest.php
index 3cb0b298bb07..e6508554f227 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/ExceptionListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/ExceptionListenerTest.php
@@ -37,9 +37,9 @@ public function testConstruct()
         $logger = new TestLogger();
         $l = new ExceptionListener('foo', $logger);
 
-        $_logger = new \ReflectionProperty(get_class($l), 'logger');
+        $_logger = new \ReflectionProperty(\get_class($l), 'logger');
         $_logger->setAccessible(true);
-        $_controller = new \ReflectionProperty(get_class($l), 'controller');
+        $_controller = new \ReflectionProperty(\get_class($l), 'controller');
         $_controller->setAccessible(true);
 
         $this->assertSame($logger, $_logger->getValue($l));
@@ -157,7 +157,7 @@ class TestLogger extends Logger implements DebugLoggerInterface
 {
     public function countErrors()
     {
-        return count($this->logs['critical']);
+        return \count($this->logs['critical']);
     }
 }
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/FragmentHandlerTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/FragmentHandlerTest.php
index 9c906b50a0be..a625795fba10 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/FragmentHandlerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/FragmentHandlerTest.php
@@ -88,7 +88,7 @@ protected function getHandler($returnValue, $arguments = array())
         ;
 
         if ($arguments) {
-            call_user_func_array(array($e, 'with'), $arguments);
+            \call_user_func_array(array($e, 'with'), $arguments);
         }
 
         $handler = new FragmentHandler($this->requestStack);
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/EsiTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/EsiTest.php
index 28a566e0d2e9..f6921b1131ff 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/EsiTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/EsiTest.php
@@ -231,10 +231,10 @@ protected function getCache($request, $response)
               ->method('getRequest')
               ->will($this->returnValue($request))
         ;
-        if (is_array($response)) {
+        if (\is_array($response)) {
             $cache->expects($this->any())
                   ->method('handle')
-                  ->will(call_user_func_array(array($this, 'onConsecutiveCalls'), $response))
+                  ->will(\call_user_func_array(array($this, 'onConsecutiveCalls'), $response))
             ;
         } else {
             $cache->expects($this->any())
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTest.php
index f5b40002460e..54d68e5b94a8 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTest.php
@@ -215,7 +215,7 @@ public function testValidatesPrivateResponsesCachedOnTheClient()
             if ($request->cookies->has('authenticated')) {
                 $response->headers->set('Cache-Control', 'private, no-store');
                 $response->setETag('"private tag"');
-                if (in_array('"private tag"', $etags)) {
+                if (\in_array('"private tag"', $etags)) {
                     $response->setStatusCode(304);
                 } else {
                     $response->setStatusCode(200);
@@ -225,7 +225,7 @@ public function testValidatesPrivateResponsesCachedOnTheClient()
             } else {
                 $response->headers->set('Cache-Control', 'public');
                 $response->setETag('"public tag"');
-                if (in_array('"public tag"', $etags)) {
+                if (\in_array('"public tag"', $etags)) {
                     $response->setStatusCode(304);
                 } else {
                     $response->setStatusCode(200);
@@ -958,7 +958,7 @@ public function testUsesCacheToRespondToHeadRequestsWhenFresh()
         $this->assertHttpKernelIsNotCalled();
         $this->assertEquals(200, $this->response->getStatusCode());
         $this->assertEquals('', $this->response->getContent());
-        $this->assertEquals(strlen('Hello World'), $this->response->headers->get('Content-Length'));
+        $this->assertEquals(\strlen('Hello World'), $this->response->headers->get('Content-Length'));
     }
 
     public function testSendsNoContentWhenFresh()
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTestCase.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTestCase.php
index 96a66771a06b..138924d15dc8 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTestCase.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTestCase.php
@@ -164,7 +164,7 @@ public static function clearDirectory($directory)
 
         $fp = opendir($directory);
         while (false !== $file = readdir($fp)) {
-            if (!in_array($file, array('.', '..'))) {
+            if (!\in_array($file, array('.', '..'))) {
                 if (is_link($directory.'/'.$file)) {
                     unlink($directory.'/'.$file);
                 } elseif (is_dir($directory.'/'.$file)) {
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/SsiTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/SsiTest.php
index 8634aff6f9d1..65846abb16f3 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/SsiTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/SsiTest.php
@@ -198,10 +198,10 @@ protected function getCache($request, $response)
               ->method('getRequest')
               ->will($this->returnValue($request))
         ;
-        if (is_array($response)) {
+        if (\is_array($response)) {
             $cache->expects($this->any())
                   ->method('handle')
-                  ->will(call_user_func_array(array($this, 'onConsecutiveCalls'), $response))
+                  ->will(\call_user_func_array(array($this, 'onConsecutiveCalls'), $response))
             ;
         } else {
             $cache->expects($this->any())
diff --git a/src/Symfony/Component/HttpKernel/Tests/KernelTest.php b/src/Symfony/Component/HttpKernel/Tests/KernelTest.php
index a6d628548101..3e2453d17cff 100644
--- a/src/Symfony/Component/HttpKernel/Tests/KernelTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/KernelTest.php
@@ -142,7 +142,7 @@ public function testEnvParametersResourceIsAdded()
             ->method('getLogDir')
             ->will($this->returnValue(sys_get_temp_dir()));
 
-        $reflection = new \ReflectionClass(get_class($kernel));
+        $reflection = new \ReflectionClass(\get_class($kernel));
         $method = $reflection->getMethod('buildContainer');
         $method->setAccessible(true);
         $method->invoke($kernel);
@@ -799,7 +799,7 @@ protected function getBundle($dir = null, $parent = null, $className = null, $bu
         $bundle
             ->expects($this->any())
             ->method('getName')
-            ->will($this->returnValue(null === $bundleName ? get_class($bundle) : $bundleName))
+            ->will($this->returnValue(null === $bundleName ? \get_class($bundle) : $bundleName))
         ;
 
         $bundle
diff --git a/src/Symfony/Component/HttpKernel/Tests/Profiler/Mock/MemcacheMock.php b/src/Symfony/Component/HttpKernel/Tests/Profiler/Mock/MemcacheMock.php
index 9ca98168027a..52d7abed5ffc 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Profiler/Mock/MemcacheMock.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Profiler/Mock/MemcacheMock.php
@@ -172,7 +172,7 @@ public function get($key, &$flags = null)
             return false;
         }
 
-        if (is_array($key)) {
+        if (\is_array($key)) {
             $result = array();
             foreach ($key as $k) {
                 if (isset($this->storage[$k])) {
diff --git a/src/Symfony/Component/HttpKernel/Tests/Profiler/Mock/RedisMock.php b/src/Symfony/Component/HttpKernel/Tests/Profiler/Mock/RedisMock.php
index 91222c165b86..866ce8121858 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Profiler/Mock/RedisMock.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Profiler/Mock/RedisMock.php
@@ -148,7 +148,7 @@ public function append($key, $value)
         if (isset($this->storage[$key])) {
             $this->storeData($key, $this->getData($key).$value);
 
-            return strlen($this->storage[$key]);
+            return \strlen($this->storage[$key]);
         }
 
         return false;
@@ -167,7 +167,7 @@ public function delete($key)
             return false;
         }
 
-        if (is_array($key)) {
+        if (\is_array($key)) {
             $result = 0;
             foreach ($key as $k) {
                 if (isset($this->storage[$k])) {
diff --git a/src/Symfony/Component/Intl/Data/Bundle/Reader/BundleEntryReader.php b/src/Symfony/Component/Intl/Data/Bundle/Reader/BundleEntryReader.php
index aedcac918515..79f14c4b14cf 100644
--- a/src/Symfony/Component/Intl/Data/Bundle/Reader/BundleEntryReader.php
+++ b/src/Symfony/Component/Intl/Data/Bundle/Reader/BundleEntryReader.php
@@ -90,7 +90,7 @@ public function readEntry($path, $locale, array $indices, $fallback = true)
                 $readSucceeded = true;
 
                 $isCurrentTraversable = $currentEntry instanceof \Traversable;
-                $isCurrentMultiValued = $isCurrentTraversable || is_array($currentEntry);
+                $isCurrentMultiValued = $isCurrentTraversable || \is_array($currentEntry);
 
                 // Return immediately if fallback is disabled or we are dealing
                 // with a scalar non-null entry
@@ -162,7 +162,7 @@ public function readEntry($path, $locale, array $indices, $fallback = true)
         );
 
         // Append fallback locales, if any
-        if (count($testedLocales) > 1) {
+        if (\count($testedLocales) > 1) {
             // Remove original locale
             array_shift($testedLocales);
 
diff --git a/src/Symfony/Component/Intl/Data/Bundle/Reader/JsonBundleReader.php b/src/Symfony/Component/Intl/Data/Bundle/Reader/JsonBundleReader.php
index 17a9df32c21a..b5786d12a22e 100644
--- a/src/Symfony/Component/Intl/Data/Bundle/Reader/JsonBundleReader.php
+++ b/src/Symfony/Component/Intl/Data/Bundle/Reader/JsonBundleReader.php
@@ -31,7 +31,7 @@ public function read($path, $locale)
         $fileName = $path.'/'.$locale.'.json';
 
         // prevent directory traversal attacks
-        if (dirname($fileName) !== $path) {
+        if (\dirname($fileName) !== $path) {
             throw new ResourceBundleNotFoundException(sprintf('The resource bundle "%s" does not exist.', $fileName));
         }
 
diff --git a/src/Symfony/Component/Intl/Data/Bundle/Reader/PhpBundleReader.php b/src/Symfony/Component/Intl/Data/Bundle/Reader/PhpBundleReader.php
index 0b66bb1a557c..7c4b71c93ac1 100644
--- a/src/Symfony/Component/Intl/Data/Bundle/Reader/PhpBundleReader.php
+++ b/src/Symfony/Component/Intl/Data/Bundle/Reader/PhpBundleReader.php
@@ -31,7 +31,7 @@ public function read($path, $locale)
         $fileName = $path.'/'.$locale.'.php';
 
         // prevent directory traversal attacks
-        if (dirname($fileName) !== $path) {
+        if (\dirname($fileName) !== $path) {
             throw new ResourceBundleNotFoundException(sprintf('The resource bundle "%s" does not exist.', $fileName));
         }
 
diff --git a/src/Symfony/Component/Intl/Data/Bundle/Writer/TextBundleWriter.php b/src/Symfony/Component/Intl/Data/Bundle/Writer/TextBundleWriter.php
index 20fad5347aed..309e4303b18e 100644
--- a/src/Symfony/Component/Intl/Data/Bundle/Writer/TextBundleWriter.php
+++ b/src/Symfony/Component/Intl/Data/Bundle/Writer/TextBundleWriter.php
@@ -72,7 +72,7 @@ private function writeResourceBundle($file, $bundleName, $value, $fallback)
      */
     private function writeResource($file, $value, $indentation, $requireBraces = true)
     {
-        if (is_int($value)) {
+        if (\is_int($value)) {
             $this->writeInteger($file, $value);
 
             return;
@@ -82,13 +82,13 @@ private function writeResource($file, $value, $indentation, $requireBraces = tru
             $value = iterator_to_array($value);
         }
 
-        if (is_array($value)) {
-            $intValues = count($value) === count(array_filter($value, 'is_int'));
+        if (\is_array($value)) {
+            $intValues = \count($value) === \count(array_filter($value, 'is_int'));
 
             $keys = array_keys($value);
 
             // check that the keys are 0-indexed and ascending
-            $intKeys = $keys === range(0, count($keys) - 1);
+            $intKeys = $keys === range(0, \count($keys) - 1);
 
             if ($intValues && $intKeys) {
                 $this->writeIntVector($file, $value, $indentation);
@@ -107,7 +107,7 @@ private function writeResource($file, $value, $indentation, $requireBraces = tru
             return;
         }
 
-        if (is_bool($value)) {
+        if (\is_bool($value)) {
             $value = $value ? 'true' : 'false';
         }
 
@@ -206,7 +206,7 @@ private function writeArray($file, array $value, $indentation)
      */
     private function writeTable($file, $value, $indentation, $fallback = true)
     {
-        if (!is_array($value) && !$value instanceof \Traversable) {
+        if (!\is_array($value) && !$value instanceof \Traversable) {
             throw new UnexpectedTypeException($value, 'array or \Traversable');
         }
 
diff --git a/src/Symfony/Component/Intl/Data/Generator/LanguageDataGenerator.php b/src/Symfony/Component/Intl/Data/Generator/LanguageDataGenerator.php
index 52225f4941a1..c7046ba8790a 100644
--- a/src/Symfony/Component/Intl/Data/Generator/LanguageDataGenerator.php
+++ b/src/Symfony/Component/Intl/Data/Generator/LanguageDataGenerator.php
@@ -171,7 +171,7 @@ private function generateAlpha2ToAlpha3Mapping(ArrayAccessibleResourceBundle $me
 
         foreach ($aliases as $alias => $language) {
             $language = $language['replacement'];
-            if (2 === strlen($language) && 3 === strlen($alias)) {
+            if (2 === \strlen($language) && 3 === \strlen($alias)) {
                 if (isset(self::$preferredAlpha2ToAlpha3Mapping[$language])) {
                     // Validate to prevent typos
                     if (!isset($aliases[self::$preferredAlpha2ToAlpha3Mapping[$language]])) {
diff --git a/src/Symfony/Component/Intl/Data/Generator/LocaleDataGenerator.php b/src/Symfony/Component/Intl/Data/Generator/LocaleDataGenerator.php
index 5951a77043ee..e2cf6d31581c 100644
--- a/src/Symfony/Component/Intl/Data/Generator/LocaleDataGenerator.php
+++ b/src/Symfony/Component/Intl/Data/Generator/LocaleDataGenerator.php
@@ -106,7 +106,7 @@ public function generateData(GeneratorConfig $config)
             }
 
             // If no names remain to be saved for the current locale, skip it
-            if (0 === count($localeNames[$displayLocale])) {
+            if (0 === \count($localeNames[$displayLocale])) {
                 continue;
             }
 
@@ -147,7 +147,7 @@ private function generateLocaleName($locale, $displayLocale)
 
         // Currently the only available variant is POSIX, which we don't want
         // to include in the list
-        if (count($variants) > 0) {
+        if (\count($variants) > 0) {
             return;
         }
 
@@ -192,7 +192,7 @@ private function generateLocaleName($locale, $displayLocale)
             $extras[] = $regionName;
         }
 
-        if (count($extras) > 0) {
+        if (\count($extras) > 0) {
             // Remove any existing extras
             // For example, in German, zh_Hans is "Chinesisch (vereinfacht)".
             // The latter is the script part which is already included in the
@@ -219,7 +219,7 @@ private function generateFallbackMapping(array $displayLocales, array $aliases)
             while (null !== ($fallback = Locale::getFallback($fallback))) {
                 // Currently, no locale has an alias as fallback locale.
                 // If this starts to be the case, we need to add code here.
-                assert(!isset($aliases[$fallback]));
+                \assert(!isset($aliases[$fallback]));
 
                 // Check whether the fallback exists
                 if (isset($displayLocales[$fallback])) {
diff --git a/src/Symfony/Component/Intl/Data/Generator/RegionDataGenerator.php b/src/Symfony/Component/Intl/Data/Generator/RegionDataGenerator.php
index 7ae31bd121ff..b7204365fb7e 100644
--- a/src/Symfony/Component/Intl/Data/Generator/RegionDataGenerator.php
+++ b/src/Symfony/Component/Intl/Data/Generator/RegionDataGenerator.php
@@ -140,7 +140,7 @@ protected function generateRegionNames(ArrayAccessibleResourceBundle $localeBund
             }
 
             // WORLD/CONTINENT/SUBCONTINENT/GROUPING
-            if (ctype_digit($region) || is_int($region)) {
+            if (ctype_digit($region) || \is_int($region)) {
                 continue;
             }
 
diff --git a/src/Symfony/Component/Intl/Data/Util/RecursiveArrayAccess.php b/src/Symfony/Component/Intl/Data/Util/RecursiveArrayAccess.php
index ff4d2f777ca1..086b55047805 100644
--- a/src/Symfony/Component/Intl/Data/Util/RecursiveArrayAccess.php
+++ b/src/Symfony/Component/Intl/Data/Util/RecursiveArrayAccess.php
@@ -24,7 +24,7 @@ public static function get($array, array $indices)
     {
         foreach ($indices as $index) {
             // Use array_key_exists() for arrays, isset() otherwise
-            if (is_array($array)) {
+            if (\is_array($array)) {
                 if (array_key_exists($index, $array)) {
                     $array = $array[$index];
                     continue;
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/FullTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/FullTransformer.php
index d633d57fd920..9c006e113e1d 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/FullTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/FullTransformer.php
@@ -109,7 +109,7 @@ public function format(\DateTime $dateTime)
      */
     public function formatReplace($dateChars, $dateTime)
     {
-        $length = strlen($dateChars);
+        $length = \strlen($dateChars);
 
         if ($this->isQuoteMatch($dateChars)) {
             return $this->replaceQuoteMatch($dateChars);
@@ -149,7 +149,7 @@ public function parse(\DateTime $dateTime, $value)
 
             foreach ($this->transformers as $char => $transformer) {
                 if (isset($matches[$char])) {
-                    $length = strlen($matches[$char]['pattern']);
+                    $length = \strlen($matches[$char]['pattern']);
                     $options = array_merge($options, $transformer->extractDateOptions($matches[$char]['value'], $length));
                 }
             }
@@ -185,7 +185,7 @@ public function getReverseMatchingRegExp($pattern)
         $escapedPattern = preg_replace('/\\\[\-|\/]/', '[\/\-]', $escapedPattern);
 
         $reverseMatchingRegExp = preg_replace_callback($this->regExp, function ($matches) use ($that) {
-            $length = strlen($matches[0]);
+            $length = \strlen($matches[0]);
             $transformerIndex = $matches[0][0];
 
             $dateChars = $matches[0];
@@ -262,7 +262,7 @@ protected function normalizeArray(array $data)
         $ret = array();
 
         foreach ($data as $key => $value) {
-            if (!is_string($key)) {
+            if (!\is_string($key)) {
                 continue;
             }
 
@@ -317,7 +317,7 @@ protected function calculateUnixTimestamp(\DateTime $dateTime, array $options)
 
         // Normalize yy year
         preg_match_all($this->regExp, $this->pattern, $matches);
-        if (in_array('yy', $matches[0])) {
+        if (\in_array('yy', $matches[0])) {
             $dateTime->setTimestamp(time());
             $year = $year > $dateTime->format('y') + 20 ? 1900 + $year : 2000 + $year;
         }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/MonthTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/MonthTransformer.php
index 391e035025a6..cc917ef82b38 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/MonthTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/MonthTransformer.php
@@ -52,7 +52,7 @@ class MonthTransformer extends Transformer
 
     public function __construct()
     {
-        if (0 === count(self::$shortMonths)) {
+        if (0 === \count(self::$shortMonths)) {
             self::$shortMonths = array_map(function ($month) {
                 return substr($month, 0, 3);
             }, self::$months);
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/TimeZoneTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/TimeZoneTransformer.php
index 9cb60b033512..40004eb5c231 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/TimeZoneTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/TimeZoneTransformer.php
@@ -31,7 +31,7 @@ public function format(\DateTime $dateTime, $length)
     {
         $timeZone = substr($dateTime->getTimezone()->getName(), 0, 3);
 
-        if (!in_array($timeZone, array('Etc', 'UTC', 'GMT'))) {
+        if (!\in_array($timeZone, array('Etc', 'UTC', 'GMT'))) {
             throw new NotImplementedException('Time zone different than GMT or UTC is not supported as a formatting output.');
         }
 
@@ -41,7 +41,7 @@ public function format(\DateTime $dateTime, $length)
         }
 
         // From ICU >= 59.1 GMT and UTC are no longer unified
-        if (in_array($timeZone, array('UTC', 'UCT', 'Universal', 'Zulu'))) {
+        if (\in_array($timeZone, array('UTC', 'UCT', 'Universal', 'Zulu'))) {
             // offset is not supported with UTC
             return $length > 3 ? 'Coordinated Universal Time' : 'UTC';
         }
diff --git a/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php b/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
index c2cde6492cee..b9f26203017a 100644
--- a/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
+++ b/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
@@ -188,7 +188,7 @@ public static function create($locale, $datetype, $timetype, $timezone = null, $
     public function format($timestamp)
     {
         // intl allows timestamps to be passed as arrays - we don't
-        if (is_array($timestamp)) {
+        if (\is_array($timestamp)) {
             $message = 'Only integer Unix timestamps and DateTime objects are supported';
 
             throw new MethodArgumentValueNotImplementedException(__METHOD__, 'timestamp', $timestamp, $message);
@@ -196,9 +196,9 @@ public function format($timestamp)
 
         // behave like the intl extension
         $argumentError = null;
-        if (!is_int($timestamp) && !$timestamp instanceof \DateTime) {
+        if (!\is_int($timestamp) && !$timestamp instanceof \DateTime) {
             $argumentError = 'datefmt_format: takes either an array or an integer timestamp value or a DateTime object';
-            if (\PHP_VERSION_ID >= 50500 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+            if (\PHP_VERSION_ID >= 50500 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
                 $argumentError = sprintf('datefmt_format: string \'%s\' is not numeric, which would be required for it to be a valid date', $timestamp);
             }
         }
@@ -360,7 +360,7 @@ public function getTimeZoneId()
         }
 
         // In PHP 5.5 default timezone depends on `date_default_timezone_get()` method
-        if (\PHP_VERSION_ID >= 50500 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+        if (\PHP_VERSION_ID >= 50500 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
             return date_default_timezone_get();
         }
     }
@@ -525,7 +525,7 @@ public function setTimeZoneId($timeZoneId)
     {
         if (null === $timeZoneId) {
             // In PHP 5.5 if $timeZoneId is null it fallbacks to `date_default_timezone_get()` method
-            if (\PHP_VERSION_ID >= 50500 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+            if (\PHP_VERSION_ID >= 50500 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
                 $timeZoneId = date_default_timezone_get();
             } else {
                 // TODO: changes were made to ext/intl in PHP 5.4.4 release that need to be investigated since it will
@@ -556,7 +556,7 @@ public function setTimeZoneId($timeZoneId)
                 $timeZone = $this->getTimeZoneId();
             }
         } catch (\Exception $e) {
-            if (\PHP_VERSION_ID >= 50500 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+            if (\PHP_VERSION_ID >= 50500 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
                 $timeZoneId = $timeZone = $this->getTimeZoneId();
             } else {
                 $timeZoneId = 'UTC';
diff --git a/src/Symfony/Component/Intl/Exception/UnexpectedTypeException.php b/src/Symfony/Component/Intl/Exception/UnexpectedTypeException.php
index 645d4926dad1..69c815b4b224 100644
--- a/src/Symfony/Component/Intl/Exception/UnexpectedTypeException.php
+++ b/src/Symfony/Component/Intl/Exception/UnexpectedTypeException.php
@@ -20,6 +20,6 @@ class UnexpectedTypeException extends InvalidArgumentException
 {
     public function __construct($value, $expectedType)
     {
-        parent::__construct(sprintf('Expected argument of type "%s", "%s" given', $expectedType, is_object($value) ? get_class($value) : gettype($value)));
+        parent::__construct(sprintf('Expected argument of type "%s", "%s" given', $expectedType, \is_object($value) ? \get_class($value) : \gettype($value)));
     }
 }
diff --git a/src/Symfony/Component/Intl/Intl.php b/src/Symfony/Component/Intl/Intl.php
index b621d7e51d32..55c4099035d0 100644
--- a/src/Symfony/Component/Intl/Intl.php
+++ b/src/Symfony/Component/Intl/Intl.php
@@ -194,7 +194,7 @@ public static function getIcuVersion()
         if (false === self::$icuVersion) {
             if (!self::isExtensionLoaded()) {
                 self::$icuVersion = self::getIcuStubVersion();
-            } elseif (defined('INTL_ICU_VERSION')) {
+            } elseif (\defined('INTL_ICU_VERSION')) {
                 self::$icuVersion = INTL_ICU_VERSION;
             } else {
                 try {
diff --git a/src/Symfony/Component/Intl/Locale.php b/src/Symfony/Component/Intl/Locale.php
index 6dbd71a4ba22..a9c36ec618b5 100644
--- a/src/Symfony/Component/Intl/Locale.php
+++ b/src/Symfony/Component/Intl/Locale.php
@@ -67,16 +67,16 @@ public static function getDefaultFallback()
      */
     public static function getFallback($locale)
     {
-        if (function_exists('locale_parse')) {
+        if (\function_exists('locale_parse')) {
             $localeSubTags = locale_parse($locale);
-            if (1 === count($localeSubTags)) {
+            if (1 === \count($localeSubTags)) {
                 if (self::$defaultFallback === $localeSubTags['language']) {
                     return 'root';
                 }
 
                 // Don't return default fallback for "root", "meta" or others
                 // Normal locales have two or three letters
-                if (strlen($locale) < 4) {
+                if (\strlen($locale) < 4) {
                     return self::$defaultFallback;
                 }
 
@@ -102,7 +102,7 @@ public static function getFallback($locale)
 
         // Don't return default fallback for "root", "meta" or others
         // Normal locales have two or three letters
-        if (strlen($locale) < 4) {
+        if (\strlen($locale) < 4) {
             return self::$defaultFallback;
         }
     }
diff --git a/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php b/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
index a4e36fb46f8e..9340760f3b6c 100644
--- a/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
+++ b/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
@@ -263,7 +263,7 @@ public function __construct($locale = 'en', $style = null, $pattern = null)
             throw new MethodArgumentValueNotImplementedException(__METHOD__, 'locale', $locale, 'Only the locale "en" is supported');
         }
 
-        if (!in_array($style, self::$supportedStyles)) {
+        if (!\in_array($style, self::$supportedStyles)) {
             $message = sprintf('The available styles are: %s.', implode(', ', array_keys(self::$supportedStyles)));
             throw new MethodArgumentValueNotImplementedException(__METHOD__, 'style', $style, $message);
         }
@@ -521,9 +521,9 @@ public function parse($value, $type = self::TYPE_DOUBLE, &$position = 0)
         // Any string before the numeric value causes error in the parsing
         if (preg_match("/^-?(?:\.\d++|([\d{$groupSep}]++)(?:\.\d++)?)/", $value, $matches)) {
             $value = $matches[0];
-            $position = strlen($value);
+            $position = \strlen($value);
             if ($error = $groupSep && isset($matches[1]) && !preg_match('/^\d{1,3}+(?:(?:,\d{3})++|\d*+)$/', $matches[1])) {
-                $position -= strlen(preg_replace('/^\d{1,3}+(?:(?:,\d++)++|\d*+)/', '', $matches[1]));
+                $position -= \strlen(preg_replace('/^\d{1,3}+(?:(?:,\d++)++|\d*+)/', '', $matches[1]));
             }
         } else {
             $error = 1;
@@ -564,7 +564,7 @@ public function parse($value, $type = self::TYPE_DOUBLE, &$position = 0)
      */
     public function setAttribute($attr, $value)
     {
-        if (!in_array($attr, self::$supportedAttributes)) {
+        if (!\in_array($attr, self::$supportedAttributes)) {
             $message = sprintf(
                 'The available attributes are: %s',
                 implode(', ', array_keys(self::$supportedAttributes))
@@ -765,7 +765,7 @@ private function getUninitializedPrecision($value, $precision)
         if (!$this->isInitializedAttribute(self::FRACTION_DIGITS)) {
             preg_match('/.*\.(.*)/', (string) $value, $digits);
             if (isset($digits[1])) {
-                $precision = strlen($digits[1]);
+                $precision = \strlen($digits[1]);
             }
         }
 
@@ -839,7 +839,7 @@ private function getInt64Value($value)
             // The negative PHP_INT_MAX was being converted to float
             if (
                 $value == -self::$int32Max - 1 &&
-                ((\PHP_VERSION_ID < 50400 && \PHP_VERSION_ID >= 50314) || \PHP_VERSION_ID >= 50404 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone')))
+                ((\PHP_VERSION_ID < 50400 && \PHP_VERSION_ID >= 50314) || \PHP_VERSION_ID >= 50404 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone')))
             ) {
                 return (int) $value;
             }
@@ -853,7 +853,7 @@ private function getInt64Value($value)
             if (
                   ($value > self::$int32Max || $value < -self::$int32Max - 1) &&
                   (\PHP_VERSION_ID < 50314 || (\PHP_VERSION_ID >= 50400 && \PHP_VERSION_ID < 50404)) &&
-                  !(extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))
+                  !(\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))
             ) {
                 $value = (-2147483648 - ($value % -2147483648)) * ($value / abs($value));
             }
@@ -871,7 +871,7 @@ private function getInt64Value($value)
      */
     private function isInvalidRoundingMode($value)
     {
-        if (in_array($value, self::$roundingModes, true)) {
+        if (\in_array($value, self::$roundingModes, true)) {
             return false;
         }
 
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/BundleEntryReaderTest.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/BundleEntryReaderTest.php
index d76e2ab39af4..3c483102c04e 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/BundleEntryReaderTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/BundleEntryReaderTest.php
@@ -189,7 +189,7 @@ public function provideMergeableValues()
      */
     public function testMergeDataWithFallbackData($childData, $parentData, $result)
     {
-        if (null === $childData || is_array($childData)) {
+        if (null === $childData || \is_array($childData)) {
             $this->readerImpl->expects($this->at(0))
                 ->method('read')
                 ->with(self::RES_DIR, 'en')
@@ -227,7 +227,7 @@ public function testDontMergeDataIfFallbackDisabled($childData, $parentData, $re
      */
     public function testMergeExistingEntryWithExistingFallbackEntry($childData, $parentData, $result)
     {
-        if (null === $childData || is_array($childData)) {
+        if (null === $childData || \is_array($childData)) {
             $this->readerImpl->expects($this->at(0))
                 ->method('read')
                 ->with(self::RES_DIR, 'en')
@@ -270,7 +270,7 @@ public function testMergeNonExistingEntryWithExistingFallbackEntry($childData, $
      */
     public function testMergeExistingEntryWithNonExistingFallbackEntry($childData, $parentData, $result)
     {
-        if (null === $childData || is_array($childData)) {
+        if (null === $childData || \is_array($childData)) {
             $this->readerImpl->expects($this->at(0))
                 ->method('read')
                 ->with(self::RES_DIR, 'en_GB')
@@ -313,8 +313,8 @@ public function testFailIfEntryFoundNeitherInParentNorChild()
      */
     public function testMergeTraversables($childData, $parentData, $result)
     {
-        $parentData = is_array($parentData) ? new \ArrayObject($parentData) : $parentData;
-        $childData = is_array($childData) ? new \ArrayObject($childData) : $childData;
+        $parentData = \is_array($parentData) ? new \ArrayObject($parentData) : $parentData;
+        $childData = \is_array($childData) ? new \ArrayObject($childData) : $childData;
 
         if (null === $childData || $childData instanceof \ArrayObject) {
             $this->readerImpl->expects($this->at(0))
@@ -343,7 +343,7 @@ public function testFollowLocaleAliases($childData, $parentData, $result)
     {
         $this->reader->setLocaleAliases(array('mo' => 'ro_MD'));
 
-        if (null === $childData || is_array($childData)) {
+        if (null === $childData || \is_array($childData)) {
             $this->readerImpl->expects($this->at(0))
                 ->method('read')
                 ->with(self::RES_DIR, 'ro_MD')
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/IntlBundleReaderTest.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/IntlBundleReaderTest.php
index 34328770ef7a..7013960e62f8 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/IntlBundleReaderTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/IntlBundleReaderTest.php
@@ -55,7 +55,7 @@ public function testReadDoesNotFollowFallback()
             $this->markTestSkipped('ResourceBundle handles disabling fallback properly only as of PHP 5.3.7 and 5.4.1.');
         }
 
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             $this->markTestSkipped('ResourceBundle does not support disabling fallback properly on HHVM.');
         }
 
@@ -75,7 +75,7 @@ public function testReadDoesNotFollowFallbackAlias()
             $this->markTestSkipped('ResourceBundle handles disabling fallback properly only as of PHP 5.3.7 and 5.4.1.');
         }
 
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             $this->markTestSkipped('ResourceBundle does not support disabling fallback properly on HHVM.');
         }
 
diff --git a/src/Symfony/Component/Intl/Tests/DateFormatter/AbstractIntlDateFormatterTest.php b/src/Symfony/Component/Intl/Tests/DateFormatter/AbstractIntlDateFormatterTest.php
index e47b5f6d48b1..4cb1c10d5e7c 100644
--- a/src/Symfony/Component/Intl/Tests/DateFormatter/AbstractIntlDateFormatterTest.php
+++ b/src/Symfony/Component/Intl/Tests/DateFormatter/AbstractIntlDateFormatterTest.php
@@ -39,7 +39,7 @@ public function testConstructorDefaultTimeZone()
         $formatter = $this->getDateFormatter('en', IntlDateFormatter::MEDIUM, IntlDateFormatter::SHORT);
 
         // In PHP 5.5 default timezone depends on `date_default_timezone_get()` method
-        if (\PHP_VERSION_ID >= 50500 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+        if (\PHP_VERSION_ID >= 50500 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
             $this->assertEquals(date_default_timezone_get(), $formatter->getTimeZoneId());
         } else {
             $this->assertNull($formatter->getTimeZoneId());
@@ -280,7 +280,7 @@ public function testFormatIllegalArgumentError($pattern, $timestamp, $errorMessa
     public function formatErrorProvider()
     {
         // With PHP 5.5 IntlDateFormatter accepts empty values ('0')
-        if (\PHP_VERSION_ID >= 50500 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+        if (\PHP_VERSION_ID >= 50500 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
             return array(
                 array('y-M-d', 'foobar', 'datefmt_format: string \'foobar\' is not numeric, which would be required for it to be a valid date: U_ILLEGAL_ARGUMENT_ERROR'),
             );
@@ -333,7 +333,7 @@ public function formatWithTimezoneProvider()
         );
 
         // As of PHP 5.5, intl ext no longer fallbacks invalid time zones to UTC
-        if (\PHP_VERSION_ID < 50500 && !(extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+        if (\PHP_VERSION_ID < 50500 && !(\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
             // When time zone not exists, uses UTC by default
             $data[] = array(0, 'Foo/Bar', '1970-01-01 00:00:00');
             $data[] = array(0, 'UTC+04:30', '1970-01-01 00:00:00');
@@ -398,7 +398,7 @@ public function formatTimezoneProvider()
             array('zzzzz', 'Etc/Greenwich', 'Greenwich Mean Time'),
         );
 
-        if (!defined('HHVM_VERSION')) {
+        if (!\defined('HHVM_VERSION')) {
             // these timezones are not considered valid in HHVM
             $cases = array_merge($cases, array(
                 array('z', 'GMT+03:00', 'GMT+3'),
@@ -416,7 +416,7 @@ public function testFormatWithGmtTimezone()
     {
         $formatter = $this->getDefaultDateFormatter('zzzz');
 
-        if (\PHP_VERSION_ID >= 50500 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+        if (\PHP_VERSION_ID >= 50500 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
             $formatter->setTimeZone('GMT+03:00');
         } else {
             $formatter->setTimeZoneId('GMT+03:00');
@@ -429,7 +429,7 @@ public function testFormatWithGmtTimeZoneAndMinutesOffset()
     {
         $formatter = $this->getDefaultDateFormatter('zzzz');
 
-        if (\PHP_VERSION_ID >= 50500 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+        if (\PHP_VERSION_ID >= 50500 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
             $formatter->setTimeZone('GMT+00:30');
         } else {
             $formatter->setTimeZoneId('GMT+00:30');
@@ -442,7 +442,7 @@ public function testFormatWithNonStandardTimezone()
     {
         $formatter = $this->getDefaultDateFormatter('zzzz');
 
-        if (\PHP_VERSION_ID >= 50500 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+        if (\PHP_VERSION_ID >= 50500 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
             $formatter->setTimeZone('Pacific/Fiji');
         } else {
             $formatter->setTimeZoneId('Pacific/Fiji');
@@ -474,7 +474,7 @@ public function testFormatWithDateTimeZoneGmt()
 
     public function testFormatWithDateTimeZoneGmtOffset()
     {
-        if (defined('HHVM_VERSION_ID') || \PHP_VERSION_ID <= 50509) {
+        if (\defined('HHVM_VERSION_ID') || \PHP_VERSION_ID <= 50509) {
             $this->markTestSkipped('DateTimeZone GMT offsets are supported since 5.5.10. See https://github.com/facebook/hhvm/issues/5875 for HHVM.');
         }
 
@@ -485,7 +485,7 @@ public function testFormatWithDateTimeZoneGmtOffset()
 
     public function testFormatWithIntlTimeZone()
     {
-        if (!extension_loaded('intl')) {
+        if (!\extension_loaded('intl')) {
             $this->markTestSkipped('Extension intl is required.');
         }
         if (\PHP_VERSION_ID < 50500 && !method_exists('IntlDateFormatter', 'setTimeZone')) {
@@ -499,7 +499,7 @@ public function testFormatWithIntlTimeZone()
 
     public function testFormatWithTimezoneFromEnvironmentVariable()
     {
-        if (\PHP_VERSION_ID >= 50500 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+        if (\PHP_VERSION_ID >= 50500 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
             $this->markTestSkipped('IntlDateFormatter in PHP 5.5 no longer depends on TZ environment.');
         }
 
@@ -522,7 +522,7 @@ public function testFormatWithTimezoneFromEnvironmentVariable()
 
     public function testFormatWithTimezoneFromPhp()
     {
-        if (\PHP_VERSION_ID < 50500 && !(extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+        if (\PHP_VERSION_ID < 50500 && !(\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
             $this->markTestSkipped('Only in PHP 5.5 IntlDateFormatter depends on default timezone (`date_default_timezone_get()`).');
         }
 
@@ -954,7 +954,7 @@ public function testSetTimeZoneId($timeZoneId, $expectedTimeZoneId)
     {
         $formatter = $this->getDefaultDateFormatter();
 
-        if (\PHP_VERSION_ID >= 50500 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+        if (\PHP_VERSION_ID >= 50500 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
             $formatter->setTimeZone($timeZoneId);
         } else {
             $formatter->setTimeZoneId($timeZoneId);
@@ -965,7 +965,7 @@ public function testSetTimeZoneId($timeZoneId, $expectedTimeZoneId)
 
     public function setTimeZoneIdProvider()
     {
-        $isPhp55 = \PHP_VERSION_ID >= 50500 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'));
+        $isPhp55 = \PHP_VERSION_ID >= 50500 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'));
 
         return array(
             array('UTC', 'UTC'),
diff --git a/src/Symfony/Component/Intl/Tests/Locale/LocaleTest.php b/src/Symfony/Component/Intl/Tests/Locale/LocaleTest.php
index 5ee414a1c250..932f659744c1 100644
--- a/src/Symfony/Component/Intl/Tests/Locale/LocaleTest.php
+++ b/src/Symfony/Component/Intl/Tests/Locale/LocaleTest.php
@@ -159,8 +159,8 @@ public function testSetDefaultAcceptsEn()
 
     protected function call($methodName)
     {
-        $args = array_slice(func_get_args(), 1);
+        $args = \array_slice(\func_get_args(), 1);
 
-        return call_user_func_array(array('Symfony\Component\Intl\Locale\Locale', $methodName), $args);
+        return \call_user_func_array(array('Symfony\Component\Intl\Locale\Locale', $methodName), $args);
     }
 }
diff --git a/src/Symfony/Component/Intl/Tests/Locale/Verification/LocaleTest.php b/src/Symfony/Component/Intl/Tests/Locale/Verification/LocaleTest.php
index adfec280a799..cdcc0fdeb664 100644
--- a/src/Symfony/Component/Intl/Tests/Locale/Verification/LocaleTest.php
+++ b/src/Symfony/Component/Intl/Tests/Locale/Verification/LocaleTest.php
@@ -31,8 +31,8 @@ protected function setUp()
 
     protected function call($methodName)
     {
-        $args = array_slice(func_get_args(), 1);
+        $args = \array_slice(\func_get_args(), 1);
 
-        return call_user_func_array(array('Locale', $methodName), $args);
+        return \call_user_func_array(array('Locale', $methodName), $args);
     }
 }
diff --git a/src/Symfony/Component/Intl/Tests/LocaleTest.php b/src/Symfony/Component/Intl/Tests/LocaleTest.php
index e10df5575ab6..57059af9ae94 100644
--- a/src/Symfony/Component/Intl/Tests/LocaleTest.php
+++ b/src/Symfony/Component/Intl/Tests/LocaleTest.php
@@ -28,7 +28,7 @@ public function provideGetFallbackTests()
             array(null, 'root'),
         );
 
-        if (function_exists('locale_parse')) {
+        if (\function_exists('locale_parse')) {
             $tests[] = array('sl_Latn_IT', 'sl-Latn-IT-nedis');
             $tests[] = array('sl_Latn', 'sl-Latn_IT');
         } else {
diff --git a/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php b/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php
index 6d681f32248b..0e10f7d374a0 100644
--- a/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php
+++ b/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php
@@ -708,7 +708,7 @@ public function testParseTypeInt64With32BitIntegerInPhp32Bit()
 
         // Bug #59597 was fixed on PHP 5.3.14 and 5.4.4
         // The negative PHP_INT_MAX was being converted to float
-        if ((\PHP_VERSION_ID < 50400 && \PHP_VERSION_ID >= 50314) || \PHP_VERSION_ID >= 50404 || (extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+        if ((\PHP_VERSION_ID < 50400 && \PHP_VERSION_ID >= 50314) || \PHP_VERSION_ID >= 50404 || (\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
             $this->assertInternalType('int', $parsedValue);
         } else {
             $this->assertInternalType('float', $parsedValue);
diff --git a/src/Symfony/Component/Intl/Util/IcuVersion.php b/src/Symfony/Component/Intl/Util/IcuVersion.php
index 1f141224a59e..5242fae206ae 100644
--- a/src/Symfony/Component/Intl/Util/IcuVersion.php
+++ b/src/Symfony/Component/Intl/Util/IcuVersion.php
@@ -91,7 +91,7 @@ public static function normalize($version, $precision)
     {
         $version = preg_replace('/^(\d)\.(\d)/', '$1$2', $version);
 
-        if (1 === strlen($version)) {
+        if (1 === \strlen($version)) {
             $version .= '0';
         }
 
diff --git a/src/Symfony/Component/Intl/Util/IntlTestHelper.php b/src/Symfony/Component/Intl/Util/IntlTestHelper.php
index 12c3ff05913c..a9f68140f9db 100644
--- a/src/Symfony/Component/Intl/Util/IntlTestHelper.php
+++ b/src/Symfony/Component/Intl/Util/IntlTestHelper.php
@@ -42,7 +42,7 @@ public static function requireIntl(TestCase $testCase, $minimumIcuVersion = null
         //   * the intl extension is loaded with version Intl::getIcuStubVersion()
         //   * the intl extension is not loaded
 
-        if (($minimumIcuVersion || defined('HHVM_VERSION_ID')) && IcuVersion::compare(Intl::getIcuVersion(), $minimumIcuVersion, '<', 1)) {
+        if (($minimumIcuVersion || \defined('HHVM_VERSION_ID')) && IcuVersion::compare(Intl::getIcuVersion(), $minimumIcuVersion, '<', 1)) {
             $testCase->markTestSkipped('ICU version '.$minimumIcuVersion.' is required.');
         }
 
diff --git a/src/Symfony/Component/Ldap/LdapClient.php b/src/Symfony/Component/Ldap/LdapClient.php
index 253adcc3d722..de341e06d270 100644
--- a/src/Symfony/Component/Ldap/LdapClient.php
+++ b/src/Symfony/Component/Ldap/LdapClient.php
@@ -41,7 +41,7 @@ class LdapClient implements LdapClientInterface
      */
     public function __construct($host = null, $port = 389, $version = 3, $useSsl = false, $useStartTls = false, $optReferrals = false)
     {
-        if (!extension_loaded('ldap')) {
+        if (!\extension_loaded('ldap')) {
             throw new LdapException('The ldap module is needed.');
         }
 
@@ -77,7 +77,7 @@ public function bind($dn = null, $password = null)
      */
     public function find($dn, $query, $filter = '*')
     {
-        if (!is_array($filter)) {
+        if (!\is_array($filter)) {
             $filter = array($filter);
         }
 
@@ -112,7 +112,7 @@ public function escape($subject, $ignore = '', $flags = 0)
             if (!empty($value) && ' ' === $value[0]) {
                 $value = '\\20'.substr($value, 1);
             }
-            if (!empty($value) && ' ' === $value[strlen($value) - 1]) {
+            if (!empty($value) && ' ' === $value[\strlen($value) - 1]) {
                 $value = substr($value, 0, -1).'\\20';
             }
             $value = str_replace("\r", '\0d', $value);
@@ -143,7 +143,7 @@ private function connect()
 
     private function disconnect()
     {
-        if ($this->connection && is_resource($this->connection)) {
+        if ($this->connection && \is_resource($this->connection)) {
             ldap_unbind($this->connection);
         }
 
diff --git a/src/Symfony/Component/OptionsResolver/OptionsResolver.php b/src/Symfony/Component/OptionsResolver/OptionsResolver.php
index 316bbfda811c..be9d44ed0579 100644
--- a/src/Symfony/Component/OptionsResolver/OptionsResolver.php
+++ b/src/Symfony/Component/OptionsResolver/OptionsResolver.php
@@ -457,7 +457,7 @@ public function setAllowedValues($option, $allowedValues = null)
         }
 
         // BC
-        if (is_array($option) && null === $allowedValues) {
+        if (\is_array($option) && null === $allowedValues) {
             @trigger_error('Calling the '.__METHOD__.' method with an array of options is deprecated since Symfony 2.6 and will be removed in 3.0. Use the new signature with a single option instead.', E_USER_DEPRECATED);
 
             foreach ($option as $optionName => $optionValues) {
@@ -475,7 +475,7 @@ public function setAllowedValues($option, $allowedValues = null)
             ));
         }
 
-        $this->allowedValues[$option] = is_array($allowedValues) ? $allowedValues : array($allowedValues);
+        $this->allowedValues[$option] = \is_array($allowedValues) ? $allowedValues : array($allowedValues);
 
         // Make sure the option is processed
         unset($this->resolved[$option]);
@@ -513,7 +513,7 @@ public function addAllowedValues($option, $allowedValues = null)
         }
 
         // BC
-        if (is_array($option) && null === $allowedValues) {
+        if (\is_array($option) && null === $allowedValues) {
             @trigger_error('Calling the '.__METHOD__.' method with an array of options is deprecated since Symfony 2.6 and will be removed in 3.0. Use the new signature with a single option instead.', E_USER_DEPRECATED);
 
             foreach ($option as $optionName => $optionValues) {
@@ -531,7 +531,7 @@ public function addAllowedValues($option, $allowedValues = null)
             ));
         }
 
-        if (!is_array($allowedValues)) {
+        if (!\is_array($allowedValues)) {
             $allowedValues = array($allowedValues);
         }
 
@@ -569,7 +569,7 @@ public function setAllowedTypes($option, $allowedTypes = null)
         }
 
         // BC
-        if (is_array($option) && null === $allowedTypes) {
+        if (\is_array($option) && null === $allowedTypes) {
             @trigger_error('Calling the '.__METHOD__.' method with an array of options is deprecated since Symfony 2.6 and will be removed in 3.0. Use the new signature with a single option instead.', E_USER_DEPRECATED);
 
             foreach ($option as $optionName => $optionTypes) {
@@ -619,7 +619,7 @@ public function addAllowedTypes($option, $allowedTypes = null)
         }
 
         // BC
-        if (is_array($option) && null === $allowedTypes) {
+        if (\is_array($option) && null === $allowedTypes) {
             @trigger_error('Calling the '.__METHOD__.' method with an array of options is deprecated since Symfony 2.6 and will be removed in 3.0. Use the new signature with a single option instead.', E_USER_DEPRECATED);
 
             foreach ($option as $optionName => $optionTypes) {
@@ -735,12 +735,12 @@ public function resolve(array $options = array())
         // Make sure that no unknown options are passed
         $diff = array_diff_key($options, $clone->defined);
 
-        if (count($diff) > 0) {
+        if (\count($diff) > 0) {
             ksort($clone->defined);
             ksort($diff);
 
             throw new UndefinedOptionsException(sprintf(
-                (count($diff) > 1 ? 'The options "%s" do not exist.' : 'The option "%s" does not exist.').' Defined options are: "%s".',
+                (\count($diff) > 1 ? 'The options "%s" do not exist.' : 'The option "%s" does not exist.').' Defined options are: "%s".',
                 implode('", "', array_keys($diff)),
                 implode('", "', array_keys($clone->defined))
             ));
@@ -755,11 +755,11 @@ public function resolve(array $options = array())
         // Check whether any required option is missing
         $diff = array_diff_key($clone->required, $clone->defaults);
 
-        if (count($diff) > 0) {
+        if (\count($diff) > 0) {
             ksort($diff);
 
             throw new MissingOptionsException(sprintf(
-                count($diff) > 1 ? 'The required options "%s" are missing.' : 'The required option "%s" is missing.',
+                \count($diff) > 1 ? 'The required options "%s" are missing.' : 'The required option "%s" is missing.',
                 implode('", "', array_keys($diff))
             ));
         }
@@ -858,7 +858,7 @@ public function offsetGet($option)
             foreach ($this->allowedTypes[$option] as $type) {
                 $type = isset(self::$typeAliases[$type]) ? self::$typeAliases[$type] : $type;
 
-                if (function_exists($isFunction = 'is_'.$type)) {
+                if (\function_exists($isFunction = 'is_'.$type)) {
                     if ($isFunction($value)) {
                         $valid = true;
                         break;
@@ -914,7 +914,7 @@ public function offsetGet($option)
                     $this->formatValue($value)
                 );
 
-                if (count($printableAllowedValues) > 0) {
+                if (\count($printableAllowedValues) > 0) {
                     $message .= sprintf(
                         ' Accepted values are: %s.',
                         $this->formatValues($printableAllowedValues)
@@ -1019,7 +1019,7 @@ public function count()
             throw new AccessException('Counting is only supported within closures of lazy options and normalizers.');
         }
 
-        return count($this->defaults);
+        return \count($this->defaults);
     }
 
     /**
@@ -1136,7 +1136,7 @@ public function isKnown($option)
      */
     private function formatTypeOf($value)
     {
-        return is_object($value) ? get_class($value) : gettype($value);
+        return \is_object($value) ? \get_class($value) : \gettype($value);
     }
 
     /**
@@ -1152,19 +1152,19 @@ private function formatTypeOf($value)
      */
     private function formatValue($value)
     {
-        if (is_object($value)) {
-            return get_class($value);
+        if (\is_object($value)) {
+            return \get_class($value);
         }
 
-        if (is_array($value)) {
+        if (\is_array($value)) {
             return 'array';
         }
 
-        if (is_string($value)) {
+        if (\is_string($value)) {
             return '"'.$value.'"';
         }
 
-        if (is_resource($value)) {
+        if (\is_resource($value)) {
             return 'resource';
         }
 
diff --git a/src/Symfony/Component/OptionsResolver/Tests/OptionsResolver2Dot6Test.php b/src/Symfony/Component/OptionsResolver/Tests/OptionsResolver2Dot6Test.php
index aeaf01996984..09cf81c3c41b 100644
--- a/src/Symfony/Component/OptionsResolver/Tests/OptionsResolver2Dot6Test.php
+++ b/src/Symfony/Component/OptionsResolver/Tests/OptionsResolver2Dot6Test.php
@@ -1490,6 +1490,6 @@ public function testCountFailsOutsideResolve()
         $this->resolver->setDefined('bar');
         $this->resolver->setDefault('lazy1', function () {});
 
-        count($this->resolver);
+        \count($this->resolver);
     }
 }
diff --git a/src/Symfony/Component/Process/PhpExecutableFinder.php b/src/Symfony/Component/Process/PhpExecutableFinder.php
index 3e38157247c5..07890935fe10 100644
--- a/src/Symfony/Component/Process/PhpExecutableFinder.php
+++ b/src/Symfony/Component/Process/PhpExecutableFinder.php
@@ -39,12 +39,12 @@ public function find($includeArgs = true)
         $args = $includeArgs && $args ? ' '.implode(' ', $args) : '';
 
         // HHVM support
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             return (getenv('PHP_BINARY') ?: PHP_BINARY).$args;
         }
 
         // PHP_BINARY return the current sapi executable
-        if (defined('PHP_BINARY') && PHP_BINARY && \in_array(PHP_SAPI, array('cli', 'cli-server', 'phpdbg'), true)) {
+        if (\defined('PHP_BINARY') && PHP_BINARY && \in_array(PHP_SAPI, array('cli', 'cli-server', 'phpdbg'), true)) {
             return PHP_BINARY.$args;
         }
 
@@ -83,7 +83,7 @@ public function findArguments()
     {
         $arguments = array();
 
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             $arguments[] = '--php';
         } elseif ('phpdbg' === PHP_SAPI) {
             $arguments[] = '-qrr';
diff --git a/src/Symfony/Component/Process/Pipes/AbstractPipes.php b/src/Symfony/Component/Process/Pipes/AbstractPipes.php
index 97fe728bfd70..bd4a459c4a65 100644
--- a/src/Symfony/Component/Process/Pipes/AbstractPipes.php
+++ b/src/Symfony/Component/Process/Pipes/AbstractPipes.php
@@ -30,9 +30,9 @@ abstract class AbstractPipes implements PipesInterface
      */
     public function __construct($input)
     {
-        if (is_resource($input)) {
+        if (\is_resource($input)) {
             $this->input = $input;
-        } elseif (is_string($input)) {
+        } elseif (\is_string($input)) {
             $this->inputBuffer = $input;
         } else {
             $this->inputBuffer = (string) $input;
diff --git a/src/Symfony/Component/Process/Pipes/WindowsPipes.php b/src/Symfony/Component/Process/Pipes/WindowsPipes.php
index bcf1329f434e..3d6f2766049a 100644
--- a/src/Symfony/Component/Process/Pipes/WindowsPipes.php
+++ b/src/Symfony/Component/Process/Pipes/WindowsPipes.php
@@ -141,7 +141,7 @@ public function readAndWrite($blocking, $close = false)
             $data = stream_get_contents($fileHandle, -1, $this->readBytes[$type]);
 
             if (isset($data[0])) {
-                $this->readBytes[$type] += strlen($data);
+                $this->readBytes[$type] += \strlen($data);
                 $read[$type] = $data;
             }
             if ($close) {
diff --git a/src/Symfony/Component/Process/Process.php b/src/Symfony/Component/Process/Process.php
index b5eb7f77d553..d04fa8734bfa 100644
--- a/src/Symfony/Component/Process/Process.php
+++ b/src/Symfony/Component/Process/Process.php
@@ -136,7 +136,7 @@ class Process
      */
     public function __construct($commandline, $cwd = null, array $env = null, $input = null, $timeout = 60, array $options = array())
     {
-        if (!function_exists('proc_open')) {
+        if (!\function_exists('proc_open')) {
             throw new RuntimeException('The Process class relies on proc_open, which is not available on your PHP installation.');
         }
 
@@ -147,7 +147,7 @@ public function __construct($commandline, $cwd = null, array $env = null, $input
         // on Gnu/Linux, PHP builds with --enable-maintainer-zts are also affected
         // @see : https://bugs.php.net/bug.php?id=51800
         // @see : https://bugs.php.net/bug.php?id=50524
-        if (null === $this->cwd && (defined('ZEND_THREAD_SAFE') || '\\' === DIRECTORY_SEPARATOR)) {
+        if (null === $this->cwd && (\defined('ZEND_THREAD_SAFE') || '\\' === DIRECTORY_SEPARATOR)) {
             $this->cwd = getcwd();
         }
         if (null !== $env) {
@@ -284,7 +284,7 @@ public function start($callback = null)
 
         $this->process = proc_open($commandline, $descriptors, $this->processPipes->pipes, $this->cwd, $this->env, $this->options);
 
-        if (!is_resource($this->process)) {
+        if (!\is_resource($this->process)) {
             throw new RuntimeException('Unable to launch a new process.');
         }
         $this->status = self::STATUS_STARTED;
@@ -1014,7 +1014,7 @@ public function setEnv(array $env)
     {
         // Process can not handle env values that are arrays
         $env = array_filter($env, function ($value) {
-            return !is_array($value);
+            return !\is_array($value);
         });
 
         $this->env = array();
@@ -1258,7 +1258,7 @@ protected function buildCallback($callback)
             }
 
             if (null !== $callback) {
-                call_user_func($callback, $type, $data);
+                \call_user_func($callback, $type, $data);
             }
         };
 
@@ -1301,7 +1301,7 @@ protected function isSigchildEnabled()
             return self::$sigchild;
         }
 
-        if (!function_exists('phpinfo') || defined('HHVM_VERSION')) {
+        if (!\function_exists('phpinfo') || \defined('HHVM_VERSION')) {
             return self::$sigchild = false;
         }
 
@@ -1379,7 +1379,7 @@ private function readPipes($blocking, $close)
     private function close()
     {
         $this->processPipes->close();
-        if (is_resource($this->process)) {
+        if (\is_resource($this->process)) {
             proc_close($this->process);
         }
         $this->exitcode = $this->processInformation['exitcode'];
@@ -1456,7 +1456,7 @@ private function doSignal($signal, $throwException)
         } else {
             if (!$this->enhanceSigchildCompatibility || !$this->isSigchildEnabled()) {
                 $ok = @proc_terminate($this->process, $signal);
-            } elseif (function_exists('posix_kill')) {
+            } elseif (\function_exists('posix_kill')) {
                 $ok = @posix_kill($pid, $signal);
             } elseif ($ok = proc_open(sprintf('kill -%d %d', $signal, $pid), array(2 => array('pipe', 'w')), $pipes)) {
                 $ok = false === fgets($pipes[2]);
diff --git a/src/Symfony/Component/Process/ProcessBuilder.php b/src/Symfony/Component/Process/ProcessBuilder.php
index 3d90f1a5d6d7..f246c871b87b 100644
--- a/src/Symfony/Component/Process/ProcessBuilder.php
+++ b/src/Symfony/Component/Process/ProcessBuilder.php
@@ -74,7 +74,7 @@ public function add($argument)
      */
     public function setPrefix($prefix)
     {
-        $this->prefix = is_array($prefix) ? $prefix : array($prefix);
+        $this->prefix = \is_array($prefix) ? $prefix : array($prefix);
 
         return $this;
     }
@@ -256,7 +256,7 @@ public function enableOutput()
      */
     public function getProcess()
     {
-        if (0 === count($this->prefix) && 0 === count($this->arguments)) {
+        if (0 === \count($this->prefix) && 0 === \count($this->arguments)) {
             throw new LogicException('You must add() command arguments before calling getProcess().');
         }
 
diff --git a/src/Symfony/Component/Process/ProcessUtils.php b/src/Symfony/Component/Process/ProcessUtils.php
index c0558b76b3c4..e51a5723b852 100644
--- a/src/Symfony/Component/Process/ProcessUtils.php
+++ b/src/Symfony/Component/Process/ProcessUtils.php
@@ -89,17 +89,17 @@ public static function escapeArgument($argument)
     public static function validateInput($caller, $input)
     {
         if (null !== $input) {
-            if (is_resource($input)) {
+            if (\is_resource($input)) {
                 return $input;
             }
-            if (is_string($input)) {
+            if (\is_string($input)) {
                 return $input;
             }
             if (is_scalar($input)) {
                 return (string) $input;
             }
             // deprecated as of Symfony 2.5, to be removed in 3.0
-            if (is_object($input) && method_exists($input, '__toString')) {
+            if (\is_object($input) && method_exists($input, '__toString')) {
                 @trigger_error('Passing an object as an input is deprecated since Symfony 2.5 and will be removed in 3.0.', E_USER_DEPRECATED);
 
                 return (string) $input;
@@ -113,6 +113,6 @@ public static function validateInput($caller, $input)
 
     private static function isSurroundedBy($arg, $char)
     {
-        return 2 < strlen($arg) && $char === $arg[0] && $char === $arg[strlen($arg) - 1];
+        return 2 < \strlen($arg) && $char === $arg[0] && $char === $arg[\strlen($arg) - 1];
     }
 }
diff --git a/src/Symfony/Component/Process/Tests/ExecutableFinderTest.php b/src/Symfony/Component/Process/Tests/ExecutableFinderTest.php
index 669e1b3eb683..5f8b5d78340b 100644
--- a/src/Symfony/Component/Process/Tests/ExecutableFinderTest.php
+++ b/src/Symfony/Component/Process/Tests/ExecutableFinderTest.php
@@ -44,7 +44,7 @@ public function testFind()
             $this->markTestSkipped('Cannot test when open_basedir is set');
         }
 
-        $this->setPath(dirname(PHP_BINARY));
+        $this->setPath(\dirname(PHP_BINARY));
 
         $finder = new ExecutableFinder();
         $result = $finder->find($this->getPhpBinaryName());
@@ -79,7 +79,7 @@ public function testFindWithExtraDirs()
 
         $this->setPath('');
 
-        $extraDirs = array(dirname(PHP_BINARY));
+        $extraDirs = array(\dirname(PHP_BINARY));
 
         $finder = new ExecutableFinder();
         $result = $finder->find($this->getPhpBinaryName(), null, $extraDirs);
@@ -100,7 +100,7 @@ public function testFindWithOpenBaseDir()
             $this->markTestSkipped('Cannot test when open_basedir is set');
         }
 
-        $this->iniSet('open_basedir', dirname(PHP_BINARY).(!defined('HHVM_VERSION') || HHVM_VERSION_ID >= 30800 ? PATH_SEPARATOR.'/' : ''));
+        $this->iniSet('open_basedir', \dirname(PHP_BINARY).(!\defined('HHVM_VERSION') || HHVM_VERSION_ID >= 30800 ? PATH_SEPARATOR.'/' : ''));
 
         $finder = new ExecutableFinder();
         $result = $finder->find($this->getPhpBinaryName());
@@ -121,7 +121,7 @@ public function testFindProcessInOpenBasedir()
         }
 
         $this->setPath('');
-        $this->iniSet('open_basedir', PHP_BINARY.(!defined('HHVM_VERSION') || HHVM_VERSION_ID >= 30800 ? PATH_SEPARATOR.'/' : ''));
+        $this->iniSet('open_basedir', PHP_BINARY.(!\defined('HHVM_VERSION') || HHVM_VERSION_ID >= 30800 ? PATH_SEPARATOR.'/' : ''));
 
         $finder = new ExecutableFinder();
         $result = $finder->find($this->getPhpBinaryName(), false);
diff --git a/src/Symfony/Component/Process/Tests/PhpExecutableFinderTest.php b/src/Symfony/Component/Process/Tests/PhpExecutableFinderTest.php
index bdec97c4d794..876202b9be2f 100644
--- a/src/Symfony/Component/Process/Tests/PhpExecutableFinderTest.php
+++ b/src/Symfony/Component/Process/Tests/PhpExecutableFinderTest.php
@@ -24,7 +24,7 @@ class PhpExecutableFinderTest extends TestCase
      */
     public function testFindWithPhpPath()
     {
-        if (defined('PHP_BINARY')) {
+        if (\defined('PHP_BINARY')) {
             $this->markTestSkipped('The PHP binary is easily available as of PHP 5.4');
         }
 
@@ -50,7 +50,7 @@ public function testFindWithPhpPath()
      */
     public function testFind()
     {
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             $this->markTestSkipped('Should not be executed in HHVM context.');
         }
 
@@ -68,7 +68,7 @@ public function testFind()
      */
     public function testFindWithHHVM()
     {
-        if (!defined('HHVM_VERSION')) {
+        if (!\defined('HHVM_VERSION')) {
             $this->markTestSkipped('Should be executed in HHVM context.');
         }
 
@@ -87,7 +87,7 @@ public function testFindArguments()
     {
         $f = new PhpExecutableFinder();
 
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             $this->assertEquals($f->findArguments(), array('--php'), '::findArguments() returns HHVM arguments');
         } elseif ('phpdbg' === PHP_SAPI) {
             $this->assertEquals($f->findArguments(), array('-qrr'), '::findArguments() returns phpdbg arguments');
@@ -101,7 +101,7 @@ public function testFindArguments()
      */
     public function testFindWithSuffix()
     {
-        if (defined('PHP_BINARY')) {
+        if (\defined('PHP_BINARY')) {
             $this->markTestSkipped('The PHP binary is easily available as of PHP 5.4');
         }
 
diff --git a/src/Symfony/Component/Process/Tests/PipeStdinInStdoutStdErrStreamSelect.php b/src/Symfony/Component/Process/Tests/PipeStdinInStdoutStdErrStreamSelect.php
index bbd7ddfeb284..1ea0e127f76b 100644
--- a/src/Symfony/Component/Process/Tests/PipeStdinInStdoutStdErrStreamSelect.php
+++ b/src/Symfony/Component/Process/Tests/PipeStdinInStdoutStdErrStreamSelect.php
@@ -35,22 +35,22 @@
     }
 
     if (in_array(STDOUT, $w) && strlen($out) > 0) {
-        $written = fwrite(STDOUT, (binary) $out, 32768);
+        $written = fwrite(STDOUT, (string) $out, 32768);
         if (false === $written) {
             die(ERR_WRITE_FAILED);
         }
-        $out = (binary) substr($out, $written);
+        $out = (string) substr($out, $written);
     }
     if (null === $read && '' === $out) {
         $write = array_diff($write, array(STDOUT));
     }
 
     if (in_array(STDERR, $w) && strlen($err) > 0) {
-        $written = fwrite(STDERR, (binary) $err, 32768);
+        $written = fwrite(STDERR, (string) $err, 32768);
         if (false === $written) {
             die(ERR_WRITE_FAILED);
         }
-        $err = (binary) substr($err, $written);
+        $err = (string) substr($err, $written);
     }
     if (null === $read && '' === $err) {
         $write = array_diff($write, array(STDERR));
diff --git a/src/Symfony/Component/Process/Tests/ProcessTest.php b/src/Symfony/Component/Process/Tests/ProcessTest.php
index c614b3aa4008..4ee5399372be 100644
--- a/src/Symfony/Component/Process/Tests/ProcessTest.php
+++ b/src/Symfony/Component/Process/Tests/ProcessTest.php
@@ -145,7 +145,7 @@ public function testAllOutputIsActuallyReadOnTermination()
 
         $o = $p->getOutput();
 
-        $this->assertEquals($expectedOutputSize, strlen($o));
+        $this->assertEquals($expectedOutputSize, \strlen($o));
     }
 
     public function testCallbacksAreExecutedWithStart()
@@ -187,8 +187,8 @@ public function testProcessPipes($code, $size)
         $p->setInput($expected);
         $p->run();
 
-        $this->assertEquals($expectedLength, strlen($p->getOutput()));
-        $this->assertEquals($expectedLength, strlen($p->getErrorOutput()));
+        $this->assertEquals($expectedLength, \strlen($p->getOutput()));
+        $this->assertEquals($expectedLength, \strlen($p->getErrorOutput()));
     }
 
     /**
@@ -209,8 +209,8 @@ public function testSetStreamAsInput($code, $size)
 
         fclose($stream);
 
-        $this->assertEquals($expectedLength, strlen($p->getOutput()));
-        $this->assertEquals($expectedLength, strlen($p->getErrorOutput()));
+        $this->assertEquals($expectedLength, \strlen($p->getOutput()));
+        $this->assertEquals($expectedLength, \strlen($p->getErrorOutput()));
     }
 
     public function testLiveStreamAsInput()
@@ -567,7 +567,7 @@ public function testUpdateStatus()
     {
         $process = $this->getProcess('echo foo');
         $process->run();
-        $this->assertGreaterThan(0, strlen($process->getOutput()));
+        $this->assertGreaterThan(0, \strlen($process->getOutput()));
     }
 
     public function testGetExitCodeIsNullOnStart()
@@ -708,7 +708,7 @@ public function testProcessIsSignaledIfStopped()
      */
     public function testProcessThrowsExceptionWhenExternallySignaled()
     {
-        if (!function_exists('posix_kill')) {
+        if (!\function_exists('posix_kill')) {
             $this->markTestSkipped('Function posix_kill is required.');
         }
         $this->skipIfNotEnhancedSigchild(false);
diff --git a/src/Symfony/Component/PropertyAccess/Exception/UnexpectedTypeException.php b/src/Symfony/Component/PropertyAccess/Exception/UnexpectedTypeException.php
index 20e5962d5b55..16898198180a 100644
--- a/src/Symfony/Component/PropertyAccess/Exception/UnexpectedTypeException.php
+++ b/src/Symfony/Component/PropertyAccess/Exception/UnexpectedTypeException.php
@@ -27,11 +27,11 @@ class UnexpectedTypeException extends RuntimeException
      */
     public function __construct($value, $path, $pathIndex = null)
     {
-        if (3 === func_num_args() && $path instanceof PropertyPathInterface) {
+        if (3 === \func_num_args() && $path instanceof PropertyPathInterface) {
             $message = sprintf(
                 'PropertyAccessor requires a graph of objects or arrays to operate on, '.
                 'but it found type "%s" while trying to traverse path "%s" at property "%s".',
-                gettype($value),
+                \gettype($value),
                 (string) $path,
                 $path->getElement($pathIndex)
             );
@@ -41,7 +41,7 @@ public function __construct($value, $path, $pathIndex = null)
             $message = sprintf(
                 'Expected argument of type "%s", "%s" given',
                 $path,
-                is_object($value) ? get_class($value) : gettype($value)
+                \is_object($value) ? \get_class($value) : \gettype($value)
             );
         }
 
diff --git a/src/Symfony/Component/PropertyAccess/PropertyAccessor.php b/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
index 233a6fe2f3fe..3d1885a85727 100644
--- a/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
+++ b/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
@@ -132,7 +132,7 @@ public function getValue($objectOrArray, $propertyPath)
         );
         $propertyValues = $this->readPropertiesUntil($zval, $propertyPath, $propertyPath->getLength(), $this->ignoreInvalidIndices);
 
-        return $propertyValues[count($propertyValues) - 1][self::VALUE];
+        return $propertyValues[\count($propertyValues) - 1][self::VALUE];
     }
 
     /**
@@ -156,7 +156,7 @@ public function setValue(&$objectOrArray, $propertyPath, $value)
                 self::$previousErrorHandler = set_error_handler(self::$errorHandler);
             }
 
-            for ($i = count($propertyValues) - 1; 0 <= $i; --$i) {
+            for ($i = \count($propertyValues) - 1; 0 <= $i; --$i) {
                 $zval = $propertyValues[$i];
                 unset($propertyValues[$i]);
 
@@ -192,7 +192,7 @@ public function setValue(&$objectOrArray, $propertyPath, $value)
                     // if current element's reference chain is not broken - current element
                     // as well as all its ancients in the property path are all passed by reference,
                     // then there is no need to continue the value setting process
-                    if (is_object($zval[self::VALUE]) || isset($zval[self::IS_REF_CHAINED])) {
+                    if (\is_object($zval[self::VALUE]) || isset($zval[self::IS_REF_CHAINED])) {
                         break;
                     }
                 }
@@ -226,16 +226,16 @@ public static function handleError($type, $message, $file, $line, $context)
             self::throwInvalidArgumentException($message, debug_backtrace(false), 1);
         }
 
-        return null !== self::$previousErrorHandler && false !== call_user_func(self::$previousErrorHandler, $type, $message, $file, $line, $context);
+        return null !== self::$previousErrorHandler && false !== \call_user_func(self::$previousErrorHandler, $type, $message, $file, $line, $context);
     }
 
     private static function throwInvalidArgumentException($message, $trace, $i)
     {
         if (isset($trace[$i]['file']) && __FILE__ === $trace[$i]['file'] && isset($trace[$i]['args'][0])) {
             $pos = strpos($message, $delim = 'must be of the type ') ?: (strpos($message, $delim = 'must be an instance of ') ?: strpos($message, $delim = 'must implement interface '));
-            $pos += strlen($delim);
+            $pos += \strlen($delim);
             $type = $trace[$i]['args'][0];
-            $type = is_object($type) ? get_class($type) : gettype($type);
+            $type = \is_object($type) ? \get_class($type) : \gettype($type);
 
             throw new InvalidArgumentException(sprintf('Expected argument of type "%s", "%s" given', substr($message, $pos, strpos($message, ',', $pos) - $pos), $type));
         }
@@ -279,12 +279,12 @@ public function isWritable($objectOrArray, $propertyPath)
             );
             $propertyValues = $this->readPropertiesUntil($zval, $propertyPath, $propertyPath->getLength() - 1);
 
-            for ($i = count($propertyValues) - 1; 0 <= $i; --$i) {
+            for ($i = \count($propertyValues) - 1; 0 <= $i; --$i) {
                 $zval = $propertyValues[$i];
                 unset($propertyValues[$i]);
 
                 if ($propertyPath->isIndex($i)) {
-                    if (!$zval[self::VALUE] instanceof \ArrayAccess && !is_array($zval[self::VALUE])) {
+                    if (!$zval[self::VALUE] instanceof \ArrayAccess && !\is_array($zval[self::VALUE])) {
                         return false;
                     }
                 } else {
@@ -293,7 +293,7 @@ public function isWritable($objectOrArray, $propertyPath)
                     }
                 }
 
-                if (is_object($zval[self::VALUE])) {
+                if (\is_object($zval[self::VALUE])) {
                     return true;
                 }
             }
@@ -321,7 +321,7 @@ public function isWritable($objectOrArray, $propertyPath)
      */
     private function readPropertiesUntil($zval, PropertyPathInterface $propertyPath, $lastIndex, $ignoreInvalidIndices = true)
     {
-        if (!is_object($zval[self::VALUE]) && !is_array($zval[self::VALUE])) {
+        if (!\is_object($zval[self::VALUE]) && !\is_array($zval[self::VALUE])) {
             throw new UnexpectedTypeException($zval[self::VALUE], $propertyPath, 0);
         }
 
@@ -335,10 +335,10 @@ private function readPropertiesUntil($zval, PropertyPathInterface $propertyPath,
             if ($isIndex) {
                 // Create missing nested arrays on demand
                 if (($zval[self::VALUE] instanceof \ArrayAccess && !$zval[self::VALUE]->offsetExists($property)) ||
-                    (is_array($zval[self::VALUE]) && !isset($zval[self::VALUE][$property]) && !array_key_exists($property, $zval[self::VALUE]))
+                    (\is_array($zval[self::VALUE]) && !isset($zval[self::VALUE][$property]) && !array_key_exists($property, $zval[self::VALUE]))
                 ) {
                     if (!$ignoreInvalidIndices) {
-                        if (!is_array($zval[self::VALUE])) {
+                        if (!\is_array($zval[self::VALUE])) {
                             if (!$zval[self::VALUE] instanceof \Traversable) {
                                 throw new NoSuchIndexException(sprintf(
                                     'Cannot read index "%s" while trying to traverse path "%s".',
@@ -374,7 +374,7 @@ private function readPropertiesUntil($zval, PropertyPathInterface $propertyPath,
             }
 
             // the final value of the path must not be validated
-            if ($i + 1 < $propertyPath->getLength() && !is_object($zval[self::VALUE]) && !is_array($zval[self::VALUE])) {
+            if ($i + 1 < $propertyPath->getLength() && !\is_object($zval[self::VALUE]) && !\is_array($zval[self::VALUE])) {
                 throw new UnexpectedTypeException($zval[self::VALUE], $propertyPath, $i + 1);
             }
 
@@ -405,8 +405,8 @@ private function readPropertiesUntil($zval, PropertyPathInterface $propertyPath,
      */
     private function readIndex($zval, $index)
     {
-        if (!$zval[self::VALUE] instanceof \ArrayAccess && !is_array($zval[self::VALUE])) {
-            throw new NoSuchIndexException(sprintf('Cannot read index "%s" from object of type "%s" because it doesn\'t implement \ArrayAccess.', $index, get_class($zval[self::VALUE])));
+        if (!$zval[self::VALUE] instanceof \ArrayAccess && !\is_array($zval[self::VALUE])) {
+            throw new NoSuchIndexException(sprintf('Cannot read index "%s" from object of type "%s" because it doesn\'t implement \ArrayAccess.', $index, \get_class($zval[self::VALUE])));
         }
 
         $result = self::$resultProto;
@@ -416,9 +416,9 @@ private function readIndex($zval, $index)
 
             if (!isset($zval[self::REF])) {
                 // Save creating references when doing read-only lookups
-            } elseif (is_array($zval[self::VALUE])) {
+            } elseif (\is_array($zval[self::VALUE])) {
                 $result[self::REF] = &$zval[self::REF][$index];
-            } elseif (is_object($result[self::VALUE])) {
+            } elseif (\is_object($result[self::VALUE])) {
                 $result[self::REF] = $result[self::VALUE];
             }
         }
@@ -438,13 +438,13 @@ private function readIndex($zval, $index)
      */
     private function readProperty($zval, $property)
     {
-        if (!is_object($zval[self::VALUE])) {
+        if (!\is_object($zval[self::VALUE])) {
             throw new NoSuchPropertyException(sprintf('Cannot read property "%s" from an array. Maybe you intended to write the property path as "[%1$s]" instead.', $property));
         }
 
         $result = self::$resultProto;
         $object = $zval[self::VALUE];
-        $access = $this->getReadAccessInfo(get_class($object), $property);
+        $access = $this->getReadAccessInfo(\get_class($object), $property);
 
         if (self::ACCESS_TYPE_METHOD === $access[self::ACCESS_TYPE]) {
             $result[self::VALUE] = $object->{$access[self::ACCESS_NAME]}();
@@ -473,7 +473,7 @@ private function readProperty($zval, $property)
         }
 
         // Objects are always passed around by reference
-        if (isset($zval[self::REF]) && is_object($result[self::VALUE])) {
+        if (isset($zval[self::REF]) && \is_object($result[self::VALUE])) {
             $result[self::REF] = $result[self::VALUE];
         }
 
@@ -562,8 +562,8 @@ private function getReadAccessInfo($class, $property)
      */
     private function writeIndex($zval, $index, $value)
     {
-        if (!$zval[self::VALUE] instanceof \ArrayAccess && !is_array($zval[self::VALUE])) {
-            throw new NoSuchIndexException(sprintf('Cannot modify index "%s" in object of type "%s" because it doesn\'t implement \ArrayAccess', $index, get_class($zval[self::VALUE])));
+        if (!$zval[self::VALUE] instanceof \ArrayAccess && !\is_array($zval[self::VALUE])) {
+            throw new NoSuchIndexException(sprintf('Cannot modify index "%s" in object of type "%s" because it doesn\'t implement \ArrayAccess', $index, \get_class($zval[self::VALUE])));
         }
 
         $zval[self::REF][$index] = $value;
@@ -580,12 +580,12 @@ private function writeIndex($zval, $index, $value)
      */
     private function writeProperty($zval, $property, $value)
     {
-        if (!is_object($zval[self::VALUE])) {
+        if (!\is_object($zval[self::VALUE])) {
             throw new NoSuchPropertyException(sprintf('Cannot write property "%s" to an array. Maybe you should write the property path as "[%1$s]" instead?', $property));
         }
 
         $object = $zval[self::VALUE];
-        $access = $this->getWriteAccessInfo(get_class($object), $property, $value);
+        $access = $this->getWriteAccessInfo(\get_class($object), $property, $value);
 
         if (self::ACCESS_TYPE_METHOD === $access[self::ACCESS_TYPE]) {
             $object->{$access[self::ACCESS_NAME]}($value);
@@ -626,12 +626,12 @@ private function writeCollection($zval, $property, $collection, $addMethod, $rem
         if ($previousValue instanceof \Traversable) {
             $previousValue = iterator_to_array($previousValue);
         }
-        if ($previousValue && is_array($previousValue)) {
-            if (is_object($collection)) {
+        if ($previousValue && \is_array($previousValue)) {
+            if (\is_object($collection)) {
                 $collection = iterator_to_array($collection);
             }
             foreach ($previousValue as $key => $item) {
-                if (!in_array($item, $collection, true)) {
+                if (!\in_array($item, $collection, true)) {
                     unset($previousValue[$key]);
                     $zval[self::VALUE]->{$removeMethod}($item);
                 }
@@ -641,7 +641,7 @@ private function writeCollection($zval, $property, $collection, $addMethod, $rem
         }
 
         foreach ($collection as $item) {
-            if (!$previousValue || !in_array($item, $previousValue, true)) {
+            if (!$previousValue || !\in_array($item, $previousValue, true)) {
                 $zval[self::VALUE]->{$addMethod}($item);
             }
         }
@@ -670,7 +670,7 @@ private function getWriteAccessInfo($class, $property, $value)
             $camelized = $this->camelize($property);
             $singulars = (array) StringUtil::singularify($camelized);
 
-            if (is_array($value) || $value instanceof \Traversable) {
+            if (\is_array($value) || $value instanceof \Traversable) {
                 $methods = $this->findAdderAndRemover($reflClass, $singulars);
 
                 if (null !== $methods) {
@@ -709,7 +709,7 @@ private function getWriteAccessInfo($class, $property, $value)
                         $property,
                         $reflClass->name,
                         implode('()", "', $methods),
-                        is_object($value) ? get_class($value) : gettype($value)
+                        \is_object($value) ? \get_class($value) : \gettype($value)
                     );
                 } else {
                     $access[self::ACCESS_TYPE] = self::ACCESS_TYPE_NOT_FOUND;
@@ -743,11 +743,11 @@ private function getWriteAccessInfo($class, $property, $value)
      */
     private function isPropertyWritable($object, $property)
     {
-        if (!is_object($object)) {
+        if (!\is_object($object)) {
             return false;
         }
 
-        $access = $this->getWriteAccessInfo(get_class($object), $property, array());
+        $access = $this->getWriteAccessInfo(\get_class($object), $property, array());
 
         return self::ACCESS_TYPE_METHOD === $access[self::ACCESS_TYPE]
             || self::ACCESS_TYPE_PROPERTY === $access[self::ACCESS_TYPE]
diff --git a/src/Symfony/Component/PropertyAccess/PropertyPath.php b/src/Symfony/Component/PropertyAccess/PropertyPath.php
index 51b6599bf360..890b8ffce61b 100644
--- a/src/Symfony/Component/PropertyAccess/PropertyPath.php
+++ b/src/Symfony/Component/PropertyAccess/PropertyPath.php
@@ -76,12 +76,12 @@ public function __construct($propertyPath)
 
             return;
         }
-        if (!is_string($propertyPath)) {
+        if (!\is_string($propertyPath)) {
             throw new InvalidArgumentException(sprintf(
                 'The property path constructor needs a string or an instance of '.
                 '"Symfony\Component\PropertyAccess\PropertyPath". '.
                 'Got: "%s"',
-                is_object($propertyPath) ? get_class($propertyPath) : gettype($propertyPath)
+                \is_object($propertyPath) ? \get_class($propertyPath) : \gettype($propertyPath)
             ));
         }
 
@@ -107,7 +107,7 @@ public function __construct($propertyPath)
 
             $this->elements[] = $element;
 
-            $position += strlen($matches[1]);
+            $position += \strlen($matches[1]);
             $remaining = $matches[4];
             $pattern = '/^(\.([^\.|\[]++)|\[([^\]]++)\])(.*)/';
         }
@@ -121,7 +121,7 @@ public function __construct($propertyPath)
             ));
         }
 
-        $this->length = count($this->elements);
+        $this->length = \count($this->elements);
     }
 
     /**
diff --git a/src/Symfony/Component/PropertyAccess/PropertyPathBuilder.php b/src/Symfony/Component/PropertyAccess/PropertyPathBuilder.php
index cecf67300f5e..12e6f5e5247a 100644
--- a/src/Symfony/Component/PropertyAccess/PropertyPathBuilder.php
+++ b/src/Symfony/Component/PropertyAccess/PropertyPathBuilder.php
@@ -45,7 +45,7 @@ public function __construct($path = null)
      */
     public function append($path, $offset = 0, $length = 0)
     {
-        if (is_string($path)) {
+        if (\is_string($path)) {
             $path = new PropertyPath($path);
         }
 
@@ -115,7 +115,7 @@ public function remove($offset, $length = 1)
      */
     public function replace($offset, $length, $path, $pathOffset = 0, $pathLength = 0)
     {
-        if (is_string($path)) {
+        if (\is_string($path)) {
             $path = new PropertyPath($path);
         }
 
@@ -187,7 +187,7 @@ public function replaceByProperty($offset, $name = null)
      */
     public function getLength()
     {
-        return count($this->elements);
+        return \count($this->elements);
     }
 
     /**
@@ -240,7 +240,7 @@ private function resize($offset, $cutLength, $insertionLength)
             return;
         }
 
-        $length = count($this->elements);
+        $length = \count($this->elements);
 
         if ($cutLength > $insertionLength) {
             // More elements should be removed than inserted
diff --git a/src/Symfony/Component/PropertyAccess/StringUtil.php b/src/Symfony/Component/PropertyAccess/StringUtil.php
index 1918763db653..500a767383da 100644
--- a/src/Symfony/Component/PropertyAccess/StringUtil.php
+++ b/src/Symfony/Component/PropertyAccess/StringUtil.php
@@ -157,7 +157,7 @@ public static function singularify($plural)
     {
         $pluralRev = strrev($plural);
         $lowerPluralRev = strtolower($pluralRev);
-        $pluralLength = strlen($lowerPluralRev);
+        $pluralLength = \strlen($lowerPluralRev);
 
         // The outer loop iterates over the entries of the plural table
         // The inner loop $j iterates over the characters of the plural suffix
@@ -200,7 +200,7 @@ public static function singularify($plural)
                     // the singular suffix too
                     $firstUpper = ctype_upper($pluralRev[$j - 1]);
 
-                    if (is_array($newSuffix)) {
+                    if (\is_array($newSuffix)) {
                         $singulars = array();
 
                         foreach ($newSuffix as $newSuffixEntry) {
diff --git a/src/Symfony/Component/PropertyAccess/Tests/Fixtures/NonTraversableArrayObject.php b/src/Symfony/Component/PropertyAccess/Tests/Fixtures/NonTraversableArrayObject.php
index fd00a730b831..d2ff935851a5 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/Fixtures/NonTraversableArrayObject.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/Fixtures/NonTraversableArrayObject.php
@@ -50,7 +50,7 @@ public function offsetUnset($offset)
 
     public function count()
     {
-        return count($this->array);
+        return \count($this->array);
     }
 
     public function serialize()
diff --git a/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TraversableArrayObject.php b/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TraversableArrayObject.php
index 3bd9795e6b25..6758f18fbcc4 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TraversableArrayObject.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TraversableArrayObject.php
@@ -55,7 +55,7 @@ public function getIterator()
 
     public function count()
     {
-        return count($this->array);
+        return \count($this->array);
     }
 
     public function serialize()
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorCollectionTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorCollectionTest.php
index 9b53998cadb9..a27718c6be8a 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorCollectionTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorCollectionTest.php
@@ -105,7 +105,7 @@ public function testSetValueCallsAdderAndRemoverForCollections()
         $axesBefore = $this->getContainer(array(1 => 'second', 3 => 'fourth', 4 => 'fifth'));
         $axesMerged = $this->getContainer(array(1 => 'first', 2 => 'second', 3 => 'third'));
         $axesAfter = $this->getContainer(array(1 => 'second', 5 => 'first', 6 => 'third'));
-        $axesMergedCopy = is_object($axesMerged) ? clone $axesMerged : $axesMerged;
+        $axesMergedCopy = \is_object($axesMerged) ? clone $axesMerged : $axesMerged;
 
         // Don't use a mock in order to test whether the collections are
         // modified while iterating them
diff --git a/src/Symfony/Component/PropertyAccess/Tests/StringUtilTest.php b/src/Symfony/Component/PropertyAccess/Tests/StringUtilTest.php
index e463ead43b6e..b6da7778e6d2 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/StringUtilTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/StringUtilTest.php
@@ -161,9 +161,9 @@ public function singularifyProvider()
     public function testSingularify($plural, $singular)
     {
         $single = StringUtil::singularify($plural);
-        if (is_string($singular) && is_array($single)) {
+        if (\is_string($singular) && \is_array($single)) {
             $this->fail("--- Expected\n`string`: ".$singular."\n+++ Actual\n`array`: ".implode(', ', $single));
-        } elseif (is_array($singular) && is_string($single)) {
+        } elseif (\is_array($singular) && \is_string($single)) {
             $this->fail("--- Expected\n`array`: ".implode(', ', $singular)."\n+++ Actual\n`string`: ".$single);
         }
 
diff --git a/src/Symfony/Component/PropertyInfo/Extractor/SerializerExtractor.php b/src/Symfony/Component/PropertyInfo/Extractor/SerializerExtractor.php
index 5acd1af22946..50c8d3b19fd5 100644
--- a/src/Symfony/Component/PropertyInfo/Extractor/SerializerExtractor.php
+++ b/src/Symfony/Component/PropertyInfo/Extractor/SerializerExtractor.php
@@ -33,7 +33,7 @@ public function __construct(ClassMetadataFactoryInterface $classMetadataFactory)
      */
     public function getProperties($class, array $context = array())
     {
-        if (!isset($context['serializer_groups']) || !is_array($context['serializer_groups'])) {
+        if (!isset($context['serializer_groups']) || !\is_array($context['serializer_groups'])) {
             return;
         }
 
diff --git a/src/Symfony/Component/PropertyInfo/Type.php b/src/Symfony/Component/PropertyInfo/Type.php
index 188c5e8b4bed..72b493eeb600 100644
--- a/src/Symfony/Component/PropertyInfo/Type.php
+++ b/src/Symfony/Component/PropertyInfo/Type.php
@@ -66,7 +66,7 @@ class Type
      */
     public function __construct($builtinType, $nullable = false, $class = null, $collection = false, Type $collectionKeyType = null, Type $collectionValueType = null)
     {
-        if (!in_array($builtinType, self::$builtinTypes)) {
+        if (!\in_array($builtinType, self::$builtinTypes)) {
             throw new \InvalidArgumentException(sprintf('"%s" is not a valid PHP type.', $builtinType));
         }
 
diff --git a/src/Symfony/Component/Routing/Annotation/Route.php b/src/Symfony/Component/Routing/Annotation/Route.php
index 93ef00bbea28..4e6b2c5b3992 100644
--- a/src/Symfony/Component/Routing/Annotation/Route.php
+++ b/src/Symfony/Component/Routing/Annotation/Route.php
@@ -46,7 +46,7 @@ public function __construct(array $data)
         foreach ($data as $key => $value) {
             $method = 'set'.str_replace('_', '', $key);
             if (!method_exists($this, $method)) {
-                throw new \BadMethodCallException(sprintf('Unknown property "%s" on annotation "%s".', $key, get_class($this)));
+                throw new \BadMethodCallException(sprintf('Unknown property "%s" on annotation "%s".', $key, \get_class($this)));
             }
             $this->$method($value);
         }
@@ -105,7 +105,7 @@ public function getName()
     public function setRequirements($requirements)
     {
         if (isset($requirements['_method'])) {
-            if (0 === count($this->methods)) {
+            if (0 === \count($this->methods)) {
                 $this->methods = explode('|', $requirements['_method']);
             }
 
@@ -113,7 +113,7 @@ public function setRequirements($requirements)
         }
 
         if (isset($requirements['_scheme'])) {
-            if (0 === count($this->schemes)) {
+            if (0 === \count($this->schemes)) {
                 $this->schemes = explode('|', $requirements['_scheme']);
             }
 
@@ -150,7 +150,7 @@ public function getDefaults()
 
     public function setSchemes($schemes)
     {
-        $this->schemes = is_array($schemes) ? $schemes : array($schemes);
+        $this->schemes = \is_array($schemes) ? $schemes : array($schemes);
     }
 
     public function getSchemes()
@@ -160,7 +160,7 @@ public function getSchemes()
 
     public function setMethods($methods)
     {
-        $this->methods = is_array($methods) ? $methods : array($methods);
+        $this->methods = \is_array($methods) ? $methods : array($methods);
     }
 
     public function getMethods()
diff --git a/src/Symfony/Component/Routing/Generator/UrlGenerator.php b/src/Symfony/Component/Routing/Generator/UrlGenerator.php
index f07f9e4caea4..17a83b28e557 100644
--- a/src/Symfony/Component/Routing/Generator/UrlGenerator.php
+++ b/src/Symfony/Component/Routing/Generator/UrlGenerator.php
@@ -126,7 +126,7 @@ public function generate($name, $parameters = array(), $referenceType = self::AB
      */
     protected function doGenerate($variables, $defaults, $requirements, $tokens, $parameters, $name, $referenceType, $hostTokens, array $requiredSchemes = array())
     {
-        if (is_bool($referenceType) || is_string($referenceType)) {
+        if (\is_bool($referenceType) || \is_string($referenceType)) {
             @trigger_error('The hardcoded value you are using for the $referenceType argument of the '.__CLASS__.'::generate method is deprecated since Symfony 2.8 and will not be supported anymore in 3.0. Use the constants defined in the UrlGeneratorInterface instead.', E_USER_DEPRECATED);
 
             if (true === $referenceType) {
@@ -199,7 +199,7 @@ protected function doGenerate($variables, $defaults, $requirements, $tokens, $pa
         $scheme = $this->context->getScheme();
 
         if ($requiredSchemes) {
-            if (!in_array($scheme, $requiredSchemes, true)) {
+            if (!\in_array($scheme, $requiredSchemes, true)) {
                 $referenceType = self::ABSOLUTE_URL;
                 $scheme = current($requiredSchemes);
             }
@@ -313,7 +313,7 @@ public static function getRelativePath($basePath, $targetPath)
         }
 
         $targetDirs[] = $targetFile;
-        $path = str_repeat('../', count($sourceDirs)).implode('/', $targetDirs);
+        $path = str_repeat('../', \count($sourceDirs)).implode('/', $targetDirs);
 
         // A reference to the same base directory or an empty subdirectory must be prefixed with "./".
         // This also applies to a segment with a colon character (e.g., "file:colon") that cannot be used
diff --git a/src/Symfony/Component/Routing/Loader/AnnotationClassLoader.php b/src/Symfony/Component/Routing/Loader/AnnotationClassLoader.php
index d84b1405e41d..0ac37025587a 100644
--- a/src/Symfony/Component/Routing/Loader/AnnotationClassLoader.php
+++ b/src/Symfony/Component/Routing/Loader/AnnotationClassLoader.php
@@ -162,7 +162,7 @@ protected function addRoute(RouteCollection $collection, $annot, $globals, \Refl
      */
     public function supports($resource, $type = null)
     {
-        return is_string($resource) && preg_match('/^(?:\\\\?[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)+$/', $resource) && (!$type || 'annotation' === $type);
+        return \is_string($resource) && preg_match('/^(?:\\\\?[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)+$/', $resource) && (!$type || 'annotation' === $type);
     }
 
     /**
diff --git a/src/Symfony/Component/Routing/Loader/AnnotationDirectoryLoader.php b/src/Symfony/Component/Routing/Loader/AnnotationDirectoryLoader.php
index 7b8467a81c0d..83ef46c9007d 100644
--- a/src/Symfony/Component/Routing/Loader/AnnotationDirectoryLoader.php
+++ b/src/Symfony/Component/Routing/Loader/AnnotationDirectoryLoader.php
@@ -74,7 +74,7 @@ function (\SplFileInfo $current) {
      */
     public function supports($resource, $type = null)
     {
-        if (!is_string($resource)) {
+        if (!\is_string($resource)) {
             return false;
         }
 
@@ -105,7 +105,7 @@ public function __construct(\RecursiveIterator $iterator, $callback)
 
     public function accept()
     {
-        return call_user_func($this->callback, $this->current(), $this->key(), $this->iterator);
+        return \call_user_func($this->callback, $this->current(), $this->key(), $this->iterator);
     }
 
     public function hasChildren()
diff --git a/src/Symfony/Component/Routing/Loader/AnnotationFileLoader.php b/src/Symfony/Component/Routing/Loader/AnnotationFileLoader.php
index ea203d4fea1c..2e1d6195725c 100644
--- a/src/Symfony/Component/Routing/Loader/AnnotationFileLoader.php
+++ b/src/Symfony/Component/Routing/Loader/AnnotationFileLoader.php
@@ -31,7 +31,7 @@ class AnnotationFileLoader extends FileLoader
      */
     public function __construct(FileLocatorInterface $locator, AnnotationClassLoader $loader)
     {
-        if (!function_exists('token_get_all')) {
+        if (!\function_exists('token_get_all')) {
             throw new \RuntimeException('The Tokenizer extension is required for the routing annotation loaders.');
         }
 
@@ -72,7 +72,7 @@ public function load($file, $type = null)
      */
     public function supports($resource, $type = null)
     {
-        return is_string($resource) && 'php' === pathinfo($resource, PATHINFO_EXTENSION) && (!$type || 'annotation' === $type);
+        return \is_string($resource) && 'php' === pathinfo($resource, PATHINFO_EXTENSION) && (!$type || 'annotation' === $type);
     }
 
     /**
@@ -100,7 +100,7 @@ protected function findClass($file)
 
             if (true === $namespace && T_STRING === $token[0]) {
                 $namespace = $token[1];
-                while (isset($tokens[++$i][1]) && in_array($tokens[$i][0], array(T_NS_SEPARATOR, T_STRING))) {
+                while (isset($tokens[++$i][1]) && \in_array($tokens[$i][0], array(T_NS_SEPARATOR, T_STRING))) {
                     $namespace .= $tokens[$i][1];
                 }
                 $token = $tokens[$i];
@@ -117,7 +117,7 @@ protected function findClass($file)
                     if (T_DOUBLE_COLON === $tokens[$j][0] || T_NEW === $tokens[$j][0]) {
                         $skipClassToken = true;
                         break;
-                    } elseif (!in_array($tokens[$j][0], array(T_WHITESPACE, T_DOC_COMMENT, T_COMMENT))) {
+                    } elseif (!\in_array($tokens[$j][0], array(T_WHITESPACE, T_DOC_COMMENT, T_COMMENT))) {
                         break;
                     }
                 }
diff --git a/src/Symfony/Component/Routing/Loader/ObjectRouteLoader.php b/src/Symfony/Component/Routing/Loader/ObjectRouteLoader.php
index 0899a818129b..12fc2bbe16e9 100644
--- a/src/Symfony/Component/Routing/Loader/ObjectRouteLoader.php
+++ b/src/Symfony/Component/Routing/Loader/ObjectRouteLoader.php
@@ -45,7 +45,7 @@ abstract protected function getServiceObject($id);
     public function load($resource, $type = null)
     {
         $parts = explode(':', $resource);
-        if (2 != count($parts)) {
+        if (2 != \count($parts)) {
             throw new \InvalidArgumentException(sprintf('Invalid resource "%s" passed to the "service" route loader: use the format "service_name:methodName"', $resource));
         }
 
@@ -54,20 +54,20 @@ public function load($resource, $type = null)
 
         $loaderObject = $this->getServiceObject($serviceString);
 
-        if (!is_object($loaderObject)) {
-            throw new \LogicException(sprintf('%s:getServiceObject() must return an object: %s returned', get_class($this), gettype($loaderObject)));
+        if (!\is_object($loaderObject)) {
+            throw new \LogicException(sprintf('%s:getServiceObject() must return an object: %s returned', \get_class($this), \gettype($loaderObject)));
         }
 
         if (!method_exists($loaderObject, $method)) {
-            throw new \BadMethodCallException(sprintf('Method "%s" not found on "%s" when importing routing resource "%s"', $method, get_class($loaderObject), $resource));
+            throw new \BadMethodCallException(sprintf('Method "%s" not found on "%s" when importing routing resource "%s"', $method, \get_class($loaderObject), $resource));
         }
 
-        $routeCollection = call_user_func(array($loaderObject, $method), $this);
+        $routeCollection = \call_user_func(array($loaderObject, $method), $this);
 
         if (!$routeCollection instanceof RouteCollection) {
-            $type = is_object($routeCollection) ? get_class($routeCollection) : gettype($routeCollection);
+            $type = \is_object($routeCollection) ? \get_class($routeCollection) : \gettype($routeCollection);
 
-            throw new \LogicException(sprintf('The %s::%s method must return a RouteCollection: %s returned', get_class($loaderObject), $method, $type));
+            throw new \LogicException(sprintf('The %s::%s method must return a RouteCollection: %s returned', \get_class($loaderObject), $method, $type));
         }
 
         // make the service file tracked so that if it changes, the cache rebuilds
diff --git a/src/Symfony/Component/Routing/Loader/PhpFileLoader.php b/src/Symfony/Component/Routing/Loader/PhpFileLoader.php
index b77be26eada3..3892511d2aa3 100644
--- a/src/Symfony/Component/Routing/Loader/PhpFileLoader.php
+++ b/src/Symfony/Component/Routing/Loader/PhpFileLoader.php
@@ -35,7 +35,7 @@ class PhpFileLoader extends FileLoader
     public function load($file, $type = null)
     {
         $path = $this->locator->locate($file);
-        $this->setCurrentDir(dirname($path));
+        $this->setCurrentDir(\dirname($path));
 
         $collection = self::includeFile($path, $this);
         $collection->addResource(new FileResource($path));
@@ -48,7 +48,7 @@ public function load($file, $type = null)
      */
     public function supports($resource, $type = null)
     {
-        return is_string($resource) && 'php' === pathinfo($resource, PATHINFO_EXTENSION) && (!$type || 'php' === $type);
+        return \is_string($resource) && 'php' === pathinfo($resource, PATHINFO_EXTENSION) && (!$type || 'php' === $type);
     }
 
     /**
diff --git a/src/Symfony/Component/Routing/Loader/XmlFileLoader.php b/src/Symfony/Component/Routing/Loader/XmlFileLoader.php
index 7dfd707ebcd5..99f2d76eb1ab 100644
--- a/src/Symfony/Component/Routing/Loader/XmlFileLoader.php
+++ b/src/Symfony/Component/Routing/Loader/XmlFileLoader.php
@@ -93,7 +93,7 @@ protected function parseNode(RouteCollection $collection, \DOMElement $node, $pa
      */
     public function supports($resource, $type = null)
     {
-        return is_string($resource) && 'xml' === pathinfo($resource, PATHINFO_EXTENSION) && (!$type || 'xml' === $type);
+        return \is_string($resource) && 'xml' === pathinfo($resource, PATHINFO_EXTENSION) && (!$type || 'xml' === $type);
     }
 
     /**
@@ -128,7 +128,7 @@ protected function parseRoute(RouteCollection $collection, \DOMElement $node, $p
         list($defaults, $requirements, $options, $condition) = $this->parseConfigs($node, $path);
 
         if (isset($requirements['_method'])) {
-            if (0 === count($methods)) {
+            if (0 === \count($methods)) {
                 $methods = explode('|', $requirements['_method']);
             }
 
@@ -137,7 +137,7 @@ protected function parseRoute(RouteCollection $collection, \DOMElement $node, $p
         }
 
         if (isset($requirements['_scheme'])) {
-            if (0 === count($schemes)) {
+            if (0 === \count($schemes)) {
                 $schemes = explode('|', $requirements['_scheme']);
             }
 
@@ -173,7 +173,7 @@ protected function parseImport(RouteCollection $collection, \DOMElement $node, $
 
         list($defaults, $requirements, $options, $condition) = $this->parseConfigs($node, $path);
 
-        $this->setCurrentDir(dirname($path));
+        $this->setCurrentDir(\dirname($path));
 
         $subCollection = $this->import($resource, ('' !== $type ? $type : null), false, $file);
         /* @var $subCollection RouteCollection */
diff --git a/src/Symfony/Component/Routing/Loader/YamlFileLoader.php b/src/Symfony/Component/Routing/Loader/YamlFileLoader.php
index 4810ce409e80..60948f4064cc 100644
--- a/src/Symfony/Component/Routing/Loader/YamlFileLoader.php
+++ b/src/Symfony/Component/Routing/Loader/YamlFileLoader.php
@@ -72,7 +72,7 @@ public function load($file, $type = null)
         }
 
         // not an array
-        if (!is_array($parsedConfig)) {
+        if (!\is_array($parsedConfig)) {
             throw new \InvalidArgumentException(sprintf('The file "%s" must contain a YAML array.', $path));
         }
 
@@ -105,7 +105,7 @@ public function load($file, $type = null)
      */
     public function supports($resource, $type = null)
     {
-        return is_string($resource) && in_array(pathinfo($resource, PATHINFO_EXTENSION), array('yml', 'yaml'), true) && (!$type || 'yaml' === $type);
+        return \is_string($resource) && \in_array(pathinfo($resource, PATHINFO_EXTENSION), array('yml', 'yaml'), true) && (!$type || 'yaml' === $type);
     }
 
     /**
@@ -127,7 +127,7 @@ protected function parseRoute(RouteCollection $collection, $name, array $config,
         $condition = isset($config['condition']) ? $config['condition'] : null;
 
         if (isset($requirements['_method'])) {
-            if (0 === count($methods)) {
+            if (0 === \count($methods)) {
                 $methods = explode('|', $requirements['_method']);
             }
 
@@ -136,7 +136,7 @@ protected function parseRoute(RouteCollection $collection, $name, array $config,
         }
 
         if (isset($requirements['_scheme'])) {
-            if (0 === count($schemes)) {
+            if (0 === \count($schemes)) {
                 $schemes = explode('|', $requirements['_scheme']);
             }
 
@@ -169,7 +169,7 @@ protected function parseImport(RouteCollection $collection, array $config, $path
         $schemes = isset($config['schemes']) ? $config['schemes'] : null;
         $methods = isset($config['methods']) ? $config['methods'] : null;
 
-        $this->setCurrentDir(dirname($path));
+        $this->setCurrentDir(\dirname($path));
 
         $subCollection = $this->import($config['resource'], $type, false, $file);
         /* @var $subCollection RouteCollection */
@@ -205,7 +205,7 @@ protected function parseImport(RouteCollection $collection, array $config, $path
      */
     protected function validate($config, $name, $path)
     {
-        if (!is_array($config)) {
+        if (!\is_array($config)) {
             throw new \InvalidArgumentException(sprintf('The definition of "%s" in "%s" must be a YAML array.', $name, $path));
         }
         if ($extraKeys = array_diff(array_keys($config), self::$availableKeys)) {
diff --git a/src/Symfony/Component/Routing/Matcher/ApacheUrlMatcher.php b/src/Symfony/Component/Routing/Matcher/ApacheUrlMatcher.php
index d73c6277bd38..1f17cee5494a 100644
--- a/src/Symfony/Component/Routing/Matcher/ApacheUrlMatcher.php
+++ b/src/Symfony/Component/Routing/Matcher/ApacheUrlMatcher.php
@@ -91,7 +91,7 @@ public function match($pathinfo)
             $parameters['_route'] = $route;
 
             return $this->mergeDefaults($parameters, $defaults);
-        } elseif (0 < count($allow)) {
+        } elseif (0 < \count($allow)) {
             throw new MethodNotAllowedException($allow);
         } else {
             return parent::match($pathinfo);
diff --git a/src/Symfony/Component/Routing/Matcher/Dumper/ApacheMatcherDumper.php b/src/Symfony/Component/Routing/Matcher/Dumper/ApacheMatcherDumper.php
index 22e2206c464a..602706939677 100644
--- a/src/Symfony/Component/Routing/Matcher/Dumper/ApacheMatcherDumper.php
+++ b/src/Symfony/Component/Routing/Matcher/Dumper/ApacheMatcherDumper.php
@@ -90,10 +90,10 @@ public function dump(array $options = array())
 
             $methodVars = array_merge($methodVars, $route->getMethods());
         }
-        if (0 < count($methodVars)) {
+        if (0 < \count($methodVars)) {
             $rule = array('# 405 Method Not Allowed');
             $methodVars = array_values(array_unique($methodVars));
-            if (in_array('GET', $methodVars) && !in_array('HEAD', $methodVars)) {
+            if (\in_array('GET', $methodVars) && !\in_array('HEAD', $methodVars)) {
                 $methodVars[] = 'HEAD';
             }
             foreach ($methodVars as $i => $methodVar) {
@@ -127,7 +127,7 @@ private function dumpRoute($name, $route, array $options, $hostRegexUnique)
 
         $methods = $this->getRouteMethods($route);
 
-        $hasTrailingSlash = (!$methods || in_array('HEAD', $methods)) && '/$' === substr($regex, -2) && '^/$' !== $regex;
+        $hasTrailingSlash = (!$methods || \in_array('HEAD', $methods)) && '/$' === substr($regex, -2) && '^/$' !== $regex;
 
         $variables = array('E=_ROUTING_route:'.$name);
         foreach ($compiledRoute->getHostVariables() as $variable) {
@@ -149,7 +149,7 @@ private function dumpRoute($name, $route, array $options, $hostRegexUnique)
         $rule = array("# $name");
 
         // method mismatch
-        if (0 < count($methods)) {
+        if (0 < \count($methods)) {
             $allow = array();
             foreach ($methods as $method) {
                 $allow[] = 'E=_ROUTING_allow_'.$method.':1';
@@ -196,7 +196,7 @@ private function getRouteMethods(Route $route)
         $methods = $route->getMethods();
 
         // GET and HEAD are equivalent
-        if (in_array('GET', $methods) && !in_array('HEAD', $methods)) {
+        if (\in_array('GET', $methods) && !\in_array('HEAD', $methods)) {
             $methods[] = 'HEAD';
         }
 
@@ -258,7 +258,7 @@ private function normalizeValues(array $values)
     {
         $normalizedValues = array();
         foreach ($values as $key => $value) {
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 foreach ($value as $index => $bit) {
                     $normalizedValues[sprintf('%s[%s]', $key, $index)] = $bit;
                 }
diff --git a/src/Symfony/Component/Routing/Matcher/Dumper/DumperPrefixCollection.php b/src/Symfony/Component/Routing/Matcher/Dumper/DumperPrefixCollection.php
index 19800fb331e4..f736f75b0525 100644
--- a/src/Symfony/Component/Routing/Matcher/Dumper/DumperPrefixCollection.php
+++ b/src/Symfony/Component/Routing/Matcher/Dumper/DumperPrefixCollection.php
@@ -67,7 +67,7 @@ public function addPrefixRoute(DumperRoute $route)
             // Prefix starts with route's prefix
             if ('' === $collection->prefix || 0 === strpos($prefix, $collection->prefix)) {
                 $child = new self();
-                $child->setPrefix(substr($prefix, 0, strlen($collection->prefix) + 1));
+                $child->setPrefix(substr($prefix, 0, \strlen($collection->prefix) + 1));
                 $collection->add($child);
 
                 return $child->addPrefixRoute($route);
diff --git a/src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherDumper.php b/src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherDumper.php
index 8701dfd304a4..e7a054e9704a 100644
--- a/src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherDumper.php
+++ b/src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherDumper.php
@@ -164,7 +164,7 @@ private function compilePrefixRoutes(DumperPrefixCollection $collection, $suppor
     {
         $code = '';
         $prefix = $collection->getPrefix();
-        $optimizable = 1 < strlen($prefix) && 1 < count($collection->all());
+        $optimizable = 1 < \strlen($prefix) && 1 < \count($collection->all());
         $optimizedPrefix = $parentPrefix;
 
         if ($optimizable) {
@@ -213,13 +213,13 @@ private function compileRoute(Route $route, $name, $supportsRedirections, $paren
         $methods = $route->getMethods();
 
         // GET and HEAD are equivalent
-        if (in_array('GET', $methods) && !in_array('HEAD', $methods)) {
+        if (\in_array('GET', $methods) && !\in_array('HEAD', $methods)) {
             $methods[] = 'HEAD';
         }
 
-        $supportsTrailingSlash = $supportsRedirections && (!$methods || in_array('GET', $methods));
+        $supportsTrailingSlash = $supportsRedirections && (!$methods || \in_array('GET', $methods));
 
-        if (!count($compiledRoute->getPathVariables()) && false !== preg_match('#^(.)\^(?P<url>.*?)\$\1#', $compiledRoute->getRegex(), $m)) {
+        if (!\count($compiledRoute->getPathVariables()) && false !== preg_match('#^(.)\^(?P<url>.*?)\$\1#', $compiledRoute->getRegex(), $m)) {
             if ($supportsTrailingSlash && '/' === substr($m['url'], -1)) {
                 $conditions[] = sprintf("%s === rtrim(\$pathinfo, '/')", var_export(rtrim(str_replace('\\', '', $m['url']), '/'), true));
                 $hasTrailingSlash = true;
@@ -314,7 +314,7 @@ private function compileRoute(Route $route, $name, $supportsRedirections, $paren
 EOF;
             }
         } elseif ($methods) {
-            if (1 === count($methods)) {
+            if (1 === \count($methods)) {
                 $code .= <<<EOF
             if (\$this->context->getMethod() != '$methods[0]') {
                 \$allow[] = '$methods[0]';
diff --git a/src/Symfony/Component/Routing/Matcher/RedirectableUrlMatcher.php b/src/Symfony/Component/Routing/Matcher/RedirectableUrlMatcher.php
index 900c59fa3739..db21fa0751f4 100644
--- a/src/Symfony/Component/Routing/Matcher/RedirectableUrlMatcher.php
+++ b/src/Symfony/Component/Routing/Matcher/RedirectableUrlMatcher.php
@@ -27,7 +27,7 @@ public function match($pathinfo)
         try {
             $parameters = parent::match($pathinfo);
         } catch (ResourceNotFoundException $e) {
-            if ('/' === substr($pathinfo, -1) || !in_array($this->context->getMethod(), array('HEAD', 'GET'))) {
+            if ('/' === substr($pathinfo, -1) || !\in_array($this->context->getMethod(), array('HEAD', 'GET'))) {
                 throw $e;
             }
 
diff --git a/src/Symfony/Component/Routing/Matcher/TraceableUrlMatcher.php b/src/Symfony/Component/Routing/Matcher/TraceableUrlMatcher.php
index 9085be042488..61cad8e692f1 100644
--- a/src/Symfony/Component/Routing/Matcher/TraceableUrlMatcher.php
+++ b/src/Symfony/Component/Routing/Matcher/TraceableUrlMatcher.php
@@ -69,7 +69,7 @@ protected function matchCollection($pathinfo, RouteCollection $routes)
                     $r = new Route($route->getPath(), $route->getDefaults(), array($n => $regex), $route->getOptions());
                     $cr = $r->compile();
 
-                    if (in_array($n, $cr->getVariables()) && !preg_match($cr->getRegex(), $pathinfo)) {
+                    if (\in_array($n, $cr->getVariables()) && !preg_match($cr->getRegex(), $pathinfo)) {
                         $this->addTrace(sprintf('Requirement for "%s" does not match (%s)', $n, $regex), self::ROUTE_ALMOST_MATCHES, $name, $route);
 
                         continue 2;
@@ -94,7 +94,7 @@ protected function matchCollection($pathinfo, RouteCollection $routes)
                     $method = 'GET';
                 }
 
-                if (!in_array($method, $requiredMethods)) {
+                if (!\in_array($method, $requiredMethods)) {
                     $this->allow = array_merge($this->allow, $requiredMethods);
 
                     $this->addTrace(sprintf('Method "%s" does not match any of the required methods (%s)', $this->context->getMethod(), implode(', ', $requiredMethods)), self::ROUTE_ALMOST_MATCHES, $name, $route);
diff --git a/src/Symfony/Component/Routing/Matcher/UrlMatcher.php b/src/Symfony/Component/Routing/Matcher/UrlMatcher.php
index e2b9f1471077..2c80e000f164 100644
--- a/src/Symfony/Component/Routing/Matcher/UrlMatcher.php
+++ b/src/Symfony/Component/Routing/Matcher/UrlMatcher.php
@@ -75,7 +75,7 @@ public function match($pathinfo)
             return $ret;
         }
 
-        throw 0 < count($this->allow)
+        throw 0 < \count($this->allow)
             ? new MethodNotAllowedException(array_unique($this->allow))
             : new ResourceNotFoundException(sprintf('No routes found for "%s".', $pathinfo));
     }
@@ -142,7 +142,7 @@ protected function matchCollection($pathinfo, RouteCollection $routes)
                     $method = 'GET';
                 }
 
-                if (!in_array($method, $requiredMethods)) {
+                if (!\in_array($method, $requiredMethods)) {
                     if (self::REQUIREMENT_MATCH === $status[0]) {
                         $this->allow = array_merge($this->allow, $requiredMethods);
                     }
@@ -213,7 +213,7 @@ protected function handleRouteRequirements($pathinfo, $name, Route $route)
     protected function mergeDefaults($params, $defaults)
     {
         foreach ($params as $key => $value) {
-            if (!is_int($key)) {
+            if (!\is_int($key)) {
                 $defaults[$key] = $value;
             }
         }
diff --git a/src/Symfony/Component/Routing/Route.php b/src/Symfony/Component/Routing/Route.php
index 41525e0d8166..721cdf6e7c5e 100644
--- a/src/Symfony/Component/Routing/Route.php
+++ b/src/Symfony/Component/Routing/Route.php
@@ -241,7 +241,7 @@ public function setSchemes($schemes)
      */
     public function hasScheme($scheme)
     {
-        return in_array(strtolower($scheme), $this->schemes, true);
+        return \in_array(strtolower($scheme), $this->schemes, true);
     }
 
     /**
@@ -596,7 +596,7 @@ public function compile()
 
     private function sanitizeRequirement($key, $regex)
     {
-        if (!is_string($regex)) {
+        if (!\is_string($regex)) {
             throw new \InvalidArgumentException(sprintf('Routing requirement for "%s" must be a string.', $key));
         }
 
diff --git a/src/Symfony/Component/Routing/RouteCollection.php b/src/Symfony/Component/Routing/RouteCollection.php
index c80a599d9d79..2615b1c4660f 100644
--- a/src/Symfony/Component/Routing/RouteCollection.php
+++ b/src/Symfony/Component/Routing/RouteCollection.php
@@ -63,7 +63,7 @@ public function getIterator()
      */
     public function count()
     {
-        return count($this->routes);
+        return \count($this->routes);
     }
 
     /**
diff --git a/src/Symfony/Component/Routing/RouteCompiler.php b/src/Symfony/Component/Routing/RouteCompiler.php
index 244e2a9c3578..bebd82bb7c3d 100644
--- a/src/Symfony/Component/Routing/RouteCompiler.php
+++ b/src/Symfony/Component/Routing/RouteCompiler.php
@@ -99,8 +99,8 @@ private static function compilePattern(Route $route, $pattern, $isHost)
             $varName = substr($match[0][0], 1, -1);
             // get all static text preceding the current variable
             $precedingText = substr($pattern, $pos, $match[0][1] - $pos);
-            $pos = $match[0][1] + strlen($match[0][0]);
-            $precedingChar = strlen($precedingText) > 0 ? substr($precedingText, -1) : '';
+            $pos = $match[0][1] + \strlen($match[0][0]);
+            $precedingChar = \strlen($precedingText) > 0 ? substr($precedingText, -1) : '';
             $isSeparator = '' !== $precedingChar && false !== strpos(static::SEPARATORS, $precedingChar);
 
             // A PCRE subpattern name must start with a non-digit. Also a PHP variable cannot start with a digit so the
@@ -108,17 +108,17 @@ private static function compilePattern(Route $route, $pattern, $isHost)
             if (preg_match('/^\d/', $varName)) {
                 throw new \DomainException(sprintf('Variable name "%s" cannot start with a digit in route pattern "%s". Please use a different name.', $varName, $pattern));
             }
-            if (in_array($varName, $variables)) {
+            if (\in_array($varName, $variables)) {
                 throw new \LogicException(sprintf('Route pattern "%s" cannot reference variable name "%s" more than once.', $pattern, $varName));
             }
 
-            if (strlen($varName) > self::VARIABLE_MAXIMUM_LENGTH) {
+            if (\strlen($varName) > self::VARIABLE_MAXIMUM_LENGTH) {
                 throw new \DomainException(sprintf('Variable name "%s" cannot be longer than %s characters in route pattern "%s". Please use a shorter name.', $varName, self::VARIABLE_MAXIMUM_LENGTH, $pattern));
             }
 
-            if ($isSeparator && strlen($precedingText) > 1) {
+            if ($isSeparator && \strlen($precedingText) > 1) {
                 $tokens[] = array('text', substr($precedingText, 0, -1));
-            } elseif (!$isSeparator && strlen($precedingText) > 0) {
+            } elseif (!$isSeparator && \strlen($precedingText) > 0) {
                 $tokens[] = array('text', $precedingText);
             }
 
@@ -152,14 +152,14 @@ private static function compilePattern(Route $route, $pattern, $isHost)
             $variables[] = $varName;
         }
 
-        if ($pos < strlen($pattern)) {
+        if ($pos < \strlen($pattern)) {
             $tokens[] = array('text', substr($pattern, $pos));
         }
 
         // find the first optional token
         $firstOptional = PHP_INT_MAX;
         if (!$isHost) {
-            for ($i = count($tokens) - 1; $i >= 0; --$i) {
+            for ($i = \count($tokens) - 1; $i >= 0; --$i) {
                 $token = $tokens[$i];
                 if ('variable' === $token[0] && $route->hasDefault($token[3])) {
                     $firstOptional = $i;
@@ -171,7 +171,7 @@ private static function compilePattern(Route $route, $pattern, $isHost)
 
         // compute the matching regexp
         $regexp = '';
-        for ($i = 0, $nbToken = count($tokens); $i < $nbToken; ++$i) {
+        for ($i = 0, $nbToken = \count($tokens); $i < $nbToken; ++$i) {
             $regexp .= self::computeRegexp($tokens, $i, $firstOptional);
         }
 
@@ -229,7 +229,7 @@ private static function computeRegexp(array $tokens, $index, $firstOptional)
                     // "?:" means it is non-capturing, i.e. the portion of the subject string that
                     // matched the optional subpattern is not passed back.
                     $regexp = "(?:$regexp";
-                    $nbTokens = count($tokens);
+                    $nbTokens = \count($tokens);
                     if ($nbTokens - 1 == $index) {
                         // Close the optional subpatterns
                         $regexp .= str_repeat(')?', $nbTokens - $firstOptional - (0 === $firstOptional ? 1 : 0));
diff --git a/src/Symfony/Component/Routing/Tests/Generator/Dumper/PhpGeneratorDumperTest.php b/src/Symfony/Component/Routing/Tests/Generator/Dumper/PhpGeneratorDumperTest.php
index f84802b35b25..b8255ba7ef31 100644
--- a/src/Symfony/Component/Routing/Tests/Generator/Dumper/PhpGeneratorDumperTest.php
+++ b/src/Symfony/Component/Routing/Tests/Generator/Dumper/PhpGeneratorDumperTest.php
@@ -86,7 +86,7 @@ public function testDumpWithRoutes()
 
     public function testDumpWithTooManyRoutes()
     {
-        if (defined('HHVM_VERSION_ID')) {
+        if (\defined('HHVM_VERSION_ID')) {
             $this->markTestSkipped('HHVM consumes too much memory on this test.');
         }
 
diff --git a/src/Symfony/Component/Routing/Tests/Loader/AnnotationClassLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/AnnotationClassLoaderTest.php
index 44229633b5cb..522e58d3e0e2 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/AnnotationClassLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/AnnotationClassLoaderTest.php
@@ -127,17 +127,17 @@ public function testLoad($className, $routeData = array(), $methodArgs = array()
 
         $this->assertSame($routeData['path'], $route->getPath(), '->load preserves path annotation');
         $this->assertCount(
-            count($routeData['requirements']),
+            \count($routeData['requirements']),
             array_intersect_assoc($routeData['requirements'], $route->getRequirements()),
             '->load preserves requirements annotation'
         );
         $this->assertCount(
-            count($routeData['options']),
+            \count($routeData['options']),
             array_intersect_assoc($routeData['options'], $route->getOptions()),
             '->load preserves options annotation'
         );
         $this->assertCount(
-            count($routeData['defaults']),
+            \count($routeData['defaults']),
             $route->getDefaults(),
             '->load preserves defaults annotation'
         );
diff --git a/src/Symfony/Component/Routing/Tests/Loader/AnnotationDirectoryLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/AnnotationDirectoryLoaderTest.php
index 8d832f0c1c03..34ceece2a7da 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/AnnotationDirectoryLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/AnnotationDirectoryLoaderTest.php
@@ -69,10 +69,10 @@ public function testSupports()
 
     private function expectAnnotationsToBeReadFrom(array $classes)
     {
-        $this->reader->expects($this->exactly(count($classes)))
+        $this->reader->expects($this->exactly(\count($classes)))
             ->method('getClassAnnotation')
             ->with($this->callback(function (\ReflectionClass $class) use ($classes) {
-                return in_array($class->getName(), $classes);
+                return \in_array($class->getName(), $classes);
             }));
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Authentication/AuthenticationProviderManager.php b/src/Symfony/Component/Security/Core/Authentication/AuthenticationProviderManager.php
index 6d631a62f1ae..f4b6794b590e 100644
--- a/src/Symfony/Component/Security/Core/Authentication/AuthenticationProviderManager.php
+++ b/src/Symfony/Component/Security/Core/Authentication/AuthenticationProviderManager.php
@@ -48,7 +48,7 @@ public function __construct(array $providers, $eraseCredentials = true)
 
         foreach ($providers as $provider) {
             if (!$provider instanceof AuthenticationProviderInterface) {
-                throw new \InvalidArgumentException(sprintf('Provider "%s" must implement the AuthenticationProviderInterface.', get_class($provider)));
+                throw new \InvalidArgumentException(sprintf('Provider "%s" must implement the AuthenticationProviderInterface.', \get_class($provider)));
             }
         }
 
@@ -102,7 +102,7 @@ public function authenticate(TokenInterface $token)
         }
 
         if (null === $lastException) {
-            $lastException = new ProviderNotFoundException(sprintf('No Authentication Provider found for token of class "%s".', get_class($token)));
+            $lastException = new ProviderNotFoundException(sprintf('No Authentication Provider found for token of class "%s".', \get_class($token)));
         }
 
         if (null !== $this->eventDispatcher) {
diff --git a/src/Symfony/Component/Security/Core/Authentication/Token/AbstractToken.php b/src/Symfony/Component/Security/Core/Authentication/Token/AbstractToken.php
index fc02e5feb926..78afdda0e0f1 100644
--- a/src/Symfony/Component/Security/Core/Authentication/Token/AbstractToken.php
+++ b/src/Symfony/Component/Security/Core/Authentication/Token/AbstractToken.php
@@ -38,10 +38,10 @@ abstract class AbstractToken implements TokenInterface
     public function __construct(array $roles = array())
     {
         foreach ($roles as $role) {
-            if (is_string($role)) {
+            if (\is_string($role)) {
                 $role = new Role($role);
             } elseif (!$role instanceof RoleInterface) {
-                throw new \InvalidArgumentException(sprintf('$roles must be an array of strings, or RoleInterface instances, but got %s.', gettype($role)));
+                throw new \InvalidArgumentException(sprintf('$roles must be an array of strings, or RoleInterface instances, but got %s.', \gettype($role)));
             }
 
             $this->roles[] = $role;
@@ -81,7 +81,7 @@ public function getUser()
      */
     public function setUser($user)
     {
-        if (!($user instanceof UserInterface || (is_object($user) && method_exists($user, '__toString')) || is_string($user))) {
+        if (!($user instanceof UserInterface || (\is_object($user) && method_exists($user, '__toString')) || \is_string($user))) {
             throw new \InvalidArgumentException('$user must be an instanceof UserInterface, an object implementing a __toString method, or a primitive string.');
         }
 
@@ -139,7 +139,7 @@ public function serialize()
     {
         return serialize(
             array(
-                is_object($this->user) ? clone $this->user : $this->user,
+                \is_object($this->user) ? clone $this->user : $this->user,
                 $this->authenticated,
                 array_map(function ($role) { return clone $role; }, $this->roles),
                 $this->attributes,
@@ -221,7 +221,7 @@ public function setAttribute($name, $value)
      */
     public function __toString()
     {
-        $class = get_class($this);
+        $class = \get_class($this);
         $class = substr($class, strrpos($class, '\\') + 1);
 
         $roles = array();
diff --git a/src/Symfony/Component/Security/Core/Authentication/Token/UsernamePasswordToken.php b/src/Symfony/Component/Security/Core/Authentication/Token/UsernamePasswordToken.php
index 9c790a98d4e5..2df1472d8c2a 100644
--- a/src/Symfony/Component/Security/Core/Authentication/Token/UsernamePasswordToken.php
+++ b/src/Symfony/Component/Security/Core/Authentication/Token/UsernamePasswordToken.php
@@ -43,7 +43,7 @@ public function __construct($user, $credentials, $providerKey, array $roles = ar
         $this->credentials = $credentials;
         $this->providerKey = $providerKey;
 
-        parent::setAuthenticated(count($roles) > 0);
+        parent::setAuthenticated(\count($roles) > 0);
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Core/Authorization/AccessDecisionManager.php b/src/Symfony/Component/Security/Core/Authorization/AccessDecisionManager.php
index e5c17233b653..56876b5a5967 100644
--- a/src/Symfony/Component/Security/Core/Authorization/AccessDecisionManager.php
+++ b/src/Symfony/Component/Security/Core/Authorization/AccessDecisionManager.php
@@ -42,7 +42,7 @@ class AccessDecisionManager implements AccessDecisionManagerInterface
     public function __construct(array $voters = array(), $strategy = self::STRATEGY_AFFIRMATIVE, $allowIfAllAbstainDecisions = false, $allowIfEqualGrantedDeniedDecisions = true)
     {
         $strategyMethod = 'decide'.ucfirst($strategy);
-        if (!is_callable(array($this, $strategyMethod))) {
+        if (!\is_callable(array($this, $strategyMethod))) {
             throw new \InvalidArgumentException(sprintf('The strategy "%s" is not supported.', $strategy));
         }
 
diff --git a/src/Symfony/Component/Security/Core/Authorization/AuthorizationChecker.php b/src/Symfony/Component/Security/Core/Authorization/AuthorizationChecker.php
index 4ada017d013a..803faf13a396 100644
--- a/src/Symfony/Component/Security/Core/Authorization/AuthorizationChecker.php
+++ b/src/Symfony/Component/Security/Core/Authorization/AuthorizationChecker.php
@@ -59,7 +59,7 @@ final public function isGranted($attributes, $object = null)
             $this->tokenStorage->setToken($token = $this->authenticationManager->authenticate($token));
         }
 
-        if (!is_array($attributes)) {
+        if (!\is_array($attributes)) {
             $attributes = array($attributes);
         }
 
diff --git a/src/Symfony/Component/Security/Core/Authorization/ExpressionLanguageProvider.php b/src/Symfony/Component/Security/Core/Authorization/ExpressionLanguageProvider.php
index 9293ba7e39d4..388040d5facb 100644
--- a/src/Symfony/Component/Security/Core/Authorization/ExpressionLanguageProvider.php
+++ b/src/Symfony/Component/Security/Core/Authorization/ExpressionLanguageProvider.php
@@ -51,7 +51,7 @@ public function getFunctions()
             new ExpressionFunction('has_role', function ($role) {
                 return sprintf('in_array(%s, $roles)', $role);
             }, function (array $variables, $role) {
-                return in_array($role, $variables['roles']);
+                return \in_array($role, $variables['roles']);
             }),
         );
     }
diff --git a/src/Symfony/Component/Security/Core/Authorization/Voter/AbstractVoter.php b/src/Symfony/Component/Security/Core/Authorization/Voter/AbstractVoter.php
index efed7416f973..6fdc8de9f3de 100644
--- a/src/Symfony/Component/Security/Core/Authorization/Voter/AbstractVoter.php
+++ b/src/Symfony/Component/Security/Core/Authorization/Voter/AbstractVoter.php
@@ -30,7 +30,7 @@ abstract class AbstractVoter implements VoterInterface
      */
     public function supportsAttribute($attribute)
     {
-        return in_array($attribute, $this->getSupportedAttributes(), true);
+        return \in_array($attribute, $this->getSupportedAttributes(), true);
     }
 
     /**
@@ -62,7 +62,7 @@ public function supportsClass($class)
      */
     public function vote(TokenInterface $token, $object, array $attributes)
     {
-        if (!$object || !$this->supportsClass(get_class($object))) {
+        if (!$object || !$this->supportsClass(\get_class($object))) {
             return self::ACCESS_ABSTAIN;
         }
 
diff --git a/src/Symfony/Component/Security/Core/Authorization/Voter/RoleVoter.php b/src/Symfony/Component/Security/Core/Authorization/Voter/RoleVoter.php
index f130ce39ee73..b03f3c710333 100644
--- a/src/Symfony/Component/Security/Core/Authorization/Voter/RoleVoter.php
+++ b/src/Symfony/Component/Security/Core/Authorization/Voter/RoleVoter.php
@@ -36,7 +36,7 @@ public function __construct($prefix = 'ROLE_')
      */
     public function supportsAttribute($attribute)
     {
-        return is_string($attribute) && 0 === strpos($attribute, $this->prefix);
+        return \is_string($attribute) && 0 === strpos($attribute, $this->prefix);
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Core/Encoder/BasePasswordEncoder.php b/src/Symfony/Component/Security/Core/Encoder/BasePasswordEncoder.php
index 57daa66557a2..75c4db896f2d 100644
--- a/src/Symfony/Component/Security/Core/Encoder/BasePasswordEncoder.php
+++ b/src/Symfony/Component/Security/Core/Encoder/BasePasswordEncoder.php
@@ -37,7 +37,7 @@ protected function demergePasswordAndSalt($mergedPasswordSalt)
         $salt = '';
         $saltBegins = strrpos($mergedPasswordSalt, '{');
 
-        if (false !== $saltBegins && $saltBegins + 1 < strlen($mergedPasswordSalt)) {
+        if (false !== $saltBegins && $saltBegins + 1 < \strlen($mergedPasswordSalt)) {
             $salt = substr($mergedPasswordSalt, $saltBegins + 1, -1);
             $password = substr($mergedPasswordSalt, 0, $saltBegins);
         }
@@ -93,6 +93,6 @@ protected function comparePasswords($password1, $password2)
      */
     protected function isPasswordTooLong($password)
     {
-        return strlen($password) > static::MAX_PASSWORD_LENGTH;
+        return \strlen($password) > static::MAX_PASSWORD_LENGTH;
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Encoder/EncoderFactory.php b/src/Symfony/Component/Security/Core/Encoder/EncoderFactory.php
index bf3ad6f423cd..0b5274efe0f9 100644
--- a/src/Symfony/Component/Security/Core/Encoder/EncoderFactory.php
+++ b/src/Symfony/Component/Security/Core/Encoder/EncoderFactory.php
@@ -40,7 +40,7 @@ public function getEncoder($user)
             $encoderKey = $encoderName;
         } else {
             foreach ($this->encoders as $class => $encoder) {
-                if ((is_object($user) && $user instanceof $class) || (!is_object($user) && (is_subclass_of($user, $class) || $user == $class))) {
+                if ((\is_object($user) && $user instanceof $class) || (!\is_object($user) && (is_subclass_of($user, $class) || $user == $class))) {
                     $encoderKey = $class;
                     break;
                 }
@@ -48,7 +48,7 @@ public function getEncoder($user)
         }
 
         if (null === $encoderKey) {
-            throw new \RuntimeException(sprintf('No encoder has been configured for account "%s".', is_object($user) ? get_class($user) : $user));
+            throw new \RuntimeException(sprintf('No encoder has been configured for account "%s".', \is_object($user) ? \get_class($user) : $user));
         }
 
         if (!$this->encoders[$encoderKey] instanceof PasswordEncoderInterface) {
diff --git a/src/Symfony/Component/Security/Core/Encoder/MessageDigestPasswordEncoder.php b/src/Symfony/Component/Security/Core/Encoder/MessageDigestPasswordEncoder.php
index e1e430d17288..7107b9611da1 100644
--- a/src/Symfony/Component/Security/Core/Encoder/MessageDigestPasswordEncoder.php
+++ b/src/Symfony/Component/Security/Core/Encoder/MessageDigestPasswordEncoder.php
@@ -45,7 +45,7 @@ public function encodePassword($raw, $salt)
             throw new BadCredentialsException('Invalid password.');
         }
 
-        if (!in_array($this->algorithm, hash_algos(), true)) {
+        if (!\in_array($this->algorithm, hash_algos(), true)) {
             throw new \LogicException(sprintf('The algorithm "%s" is not supported.', $this->algorithm));
         }
 
diff --git a/src/Symfony/Component/Security/Core/Encoder/Pbkdf2PasswordEncoder.php b/src/Symfony/Component/Security/Core/Encoder/Pbkdf2PasswordEncoder.php
index ae83ec35872c..f3b881b8221a 100644
--- a/src/Symfony/Component/Security/Core/Encoder/Pbkdf2PasswordEncoder.php
+++ b/src/Symfony/Component/Security/Core/Encoder/Pbkdf2PasswordEncoder.php
@@ -58,7 +58,7 @@ public function encodePassword($raw, $salt)
             throw new BadCredentialsException('Invalid password.');
         }
 
-        if (!in_array($this->algorithm, hash_algos(), true)) {
+        if (!\in_array($this->algorithm, hash_algos(), true)) {
             throw new \LogicException(sprintf('The algorithm "%s" is not supported.', $this->algorithm));
         }
 
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/VoterTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/VoterTest.php
index 70e3226ece44..f0e10cde1a28 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/VoterTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/VoterTest.php
@@ -66,6 +66,6 @@ protected function voteOnAttribute($attribute, $object, TokenInterface $token)
 
     protected function supports($attribute, $object)
     {
-        return $object instanceof \stdClass && in_array($attribute, array('EDIT', 'CREATE'));
+        return $object instanceof \stdClass && \in_array($attribute, array('EDIT', 'CREATE'));
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Tests/Encoder/BCryptPasswordEncoderTest.php b/src/Symfony/Component/Security/Core/Tests/Encoder/BCryptPasswordEncoderTest.php
index 0977d7350736..55590ffc3d0a 100644
--- a/src/Symfony/Component/Security/Core/Tests/Encoder/BCryptPasswordEncoderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Encoder/BCryptPasswordEncoderTest.php
@@ -58,7 +58,7 @@ public function testResultLength()
     {
         $encoder = new BCryptPasswordEncoder(self::VALID_COST);
         $result = $encoder->encodePassword(self::PASSWORD, null);
-        $this->assertEquals(60, strlen($result));
+        $this->assertEquals(60, \strlen($result));
     }
 
     public function testValidation()
diff --git a/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php
index 07c5e304b4ad..f4e0d9e6e8f9 100644
--- a/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php
@@ -33,15 +33,15 @@ public function provideTranslationFiles()
     {
         return array_map(
             function ($filePath) { return (array) $filePath; },
-            glob(dirname(dirname(__DIR__)).'/Resources/translations/*.xlf')
+            glob(\dirname(\dirname(__DIR__)).'/Resources/translations/*.xlf')
         );
     }
 
     public function testNorwegianAlias()
     {
         $this->assertFileEquals(
-            dirname(dirname(__DIR__)).'/Resources/translations/security.nb.xlf',
-            dirname(dirname(__DIR__)).'/Resources/translations/security.no.xlf',
+            \dirname(\dirname(__DIR__)).'/Resources/translations/security.nb.xlf',
+            \dirname(\dirname(__DIR__)).'/Resources/translations/security.no.xlf',
             'The NO locale should be an alias for the NB variant of the Norwegian language.'
         );
     }
diff --git a/src/Symfony/Component/Security/Core/User/ChainUserProvider.php b/src/Symfony/Component/Security/Core/User/ChainUserProvider.php
index 8604ddc4a739..eb8ae9a8469b 100644
--- a/src/Symfony/Component/Security/Core/User/ChainUserProvider.php
+++ b/src/Symfony/Component/Security/Core/User/ChainUserProvider.php
@@ -80,7 +80,7 @@ public function refreshUser(UserInterface $user)
             $e->setUsername($user->getUsername());
             throw $e;
         } else {
-            throw new UnsupportedUserException(sprintf('The account "%s" is not supported.', get_class($user)));
+            throw new UnsupportedUserException(sprintf('The account "%s" is not supported.', \get_class($user)));
         }
     }
 
diff --git a/src/Symfony/Component/Security/Core/User/InMemoryUserProvider.php b/src/Symfony/Component/Security/Core/User/InMemoryUserProvider.php
index 0af14e6a4699..7c2c3d415e0c 100644
--- a/src/Symfony/Component/Security/Core/User/InMemoryUserProvider.php
+++ b/src/Symfony/Component/Security/Core/User/InMemoryUserProvider.php
@@ -74,7 +74,7 @@ public function loadUserByUsername($username)
     public function refreshUser(UserInterface $user)
     {
         if (!$user instanceof User) {
-            throw new UnsupportedUserException(sprintf('Instances of "%s" are not supported.', get_class($user)));
+            throw new UnsupportedUserException(sprintf('Instances of "%s" are not supported.', \get_class($user)));
         }
 
         $storedUser = $this->getUser($user->getUsername());
diff --git a/src/Symfony/Component/Security/Core/User/LdapUserProvider.php b/src/Symfony/Component/Security/Core/User/LdapUserProvider.php
index 154516907414..c57e1baa5bc1 100644
--- a/src/Symfony/Component/Security/Core/User/LdapUserProvider.php
+++ b/src/Symfony/Component/Security/Core/User/LdapUserProvider.php
@@ -92,7 +92,7 @@ public function loadUser($username, $user)
     public function refreshUser(UserInterface $user)
     {
         if (!$user instanceof User) {
-            throw new UnsupportedUserException(sprintf('Instances of "%s" are not supported.', get_class($user)));
+            throw new UnsupportedUserException(sprintf('Instances of "%s" are not supported.', \get_class($user)));
         }
 
         return new User($user->getUsername(), null, $user->getRoles());
diff --git a/src/Symfony/Component/Security/Core/Util/ClassUtils.php b/src/Symfony/Component/Security/Core/Util/ClassUtils.php
index 6a544e2c2240..13ab788a884b 100644
--- a/src/Symfony/Component/Security/Core/Util/ClassUtils.php
+++ b/src/Symfony/Component/Security/Core/Util/ClassUtils.php
@@ -57,7 +57,7 @@ public static function getRealClass($object)
         }
 
         // fallback in case security-acl is not installed
-        $class = is_object($object) ? get_class($object) : $object;
+        $class = \is_object($object) ? \get_class($object) : $object;
 
         if (false === $pos = strrpos($class, '\\'.self::MARKER.'\\')) {
             return $class;
diff --git a/src/Symfony/Component/Security/Core/Util/StringUtils.php b/src/Symfony/Component/Security/Core/Util/StringUtils.php
index edf2f6df9fe9..1f880049fc01 100644
--- a/src/Symfony/Component/Security/Core/Util/StringUtils.php
+++ b/src/Symfony/Component/Security/Core/Util/StringUtils.php
@@ -45,11 +45,11 @@ private function __construct()
     public static function equals($knownString, $userInput)
     {
         // Avoid making unnecessary duplications of secret data
-        if (!is_string($knownString)) {
+        if (!\is_string($knownString)) {
             $knownString = (string) $knownString;
         }
 
-        if (!is_string($userInput)) {
+        if (!\is_string($userInput)) {
             $userInput = (string) $userInput;
         }
 
diff --git a/src/Symfony/Component/Security/Csrf/CsrfTokenManager.php b/src/Symfony/Component/Security/Csrf/CsrfTokenManager.php
index 332880fda518..c19126eaf651 100644
--- a/src/Symfony/Component/Security/Csrf/CsrfTokenManager.php
+++ b/src/Symfony/Component/Security/Csrf/CsrfTokenManager.php
@@ -56,10 +56,10 @@ public function __construct(TokenGeneratorInterface $generator = null, TokenStor
 
                 return $superGlobalNamespaceGenerator();
             };
-        } elseif (is_callable($namespace) || is_string($namespace)) {
+        } elseif (\is_callable($namespace) || \is_string($namespace)) {
             $this->namespace = $namespace;
         } else {
-            throw new InvalidArgumentException(sprintf('$namespace must be a string, a callable returning a string, null or an instance of "RequestStack". "%s" given.', gettype($namespace)));
+            throw new InvalidArgumentException(sprintf('$namespace must be a string, a callable returning a string, null or an instance of "RequestStack". "%s" given.', \gettype($namespace)));
         }
     }
 
@@ -116,6 +116,6 @@ public function isTokenValid(CsrfToken $token)
 
     private function getNamespace()
     {
-        return is_callable($ns = $this->namespace) ? $ns() : $ns;
+        return \is_callable($ns = $this->namespace) ? $ns() : $ns;
     }
 }
diff --git a/src/Symfony/Component/Security/Csrf/TokenGenerator/UriSafeTokenGenerator.php b/src/Symfony/Component/Security/Csrf/TokenGenerator/UriSafeTokenGenerator.php
index 5a489ef32f5f..6808f0f19cf3 100644
--- a/src/Symfony/Component/Security/Csrf/TokenGenerator/UriSafeTokenGenerator.php
+++ b/src/Symfony/Component/Security/Csrf/TokenGenerator/UriSafeTokenGenerator.php
@@ -29,10 +29,10 @@ class UriSafeTokenGenerator implements TokenGeneratorInterface
      */
     public function __construct($entropy = 256)
     {
-        if ($entropy instanceof SecureRandomInterface || 2 === func_num_args()) {
+        if ($entropy instanceof SecureRandomInterface || 2 === \func_num_args()) {
             @trigger_error('The '.__METHOD__.' method now requires the entropy to be given as the first argument. The SecureRandomInterface will be removed in 3.0.', E_USER_DEPRECATED);
 
-            $this->entropy = 2 === func_num_args() ? func_get_arg(1) : 256;
+            $this->entropy = 2 === \func_num_args() ? func_get_arg(1) : 256;
         } else {
             $this->entropy = $entropy;
         }
diff --git a/src/Symfony/Component/Security/Guard/Firewall/GuardAuthenticationListener.php b/src/Symfony/Component/Security/Guard/Firewall/GuardAuthenticationListener.php
index 8184406fc696..14e80bb53423 100644
--- a/src/Symfony/Component/Security/Guard/Firewall/GuardAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Guard/Firewall/GuardAuthenticationListener.php
@@ -66,7 +66,7 @@ public function __construct(GuardAuthenticatorHandler $guardHandler, Authenticat
     public function handle(GetResponseEvent $event)
     {
         if (null !== $this->logger) {
-            $this->logger->debug('Checking for guard authentication credentials.', array('firewall_key' => $this->providerKey, 'authenticators' => count($this->guardAuthenticators)));
+            $this->logger->debug('Checking for guard authentication credentials.', array('firewall_key' => $this->providerKey, 'authenticators' => \count($this->guardAuthenticators)));
         }
 
         foreach ($this->guardAuthenticators as $key => $guardAuthenticator) {
@@ -78,7 +78,7 @@ public function handle(GetResponseEvent $event)
 
             if ($event->hasResponse()) {
                 if (null !== $this->logger) {
-                    $this->logger->debug(sprintf('The "%s" authenticator set the response. Any later authenticator will not be called', get_class($guardAuthenticator)));
+                    $this->logger->debug(sprintf('The "%s" authenticator set the response. Any later authenticator will not be called', \get_class($guardAuthenticator)));
                 }
 
                 break;
@@ -91,7 +91,7 @@ private function executeGuardAuthenticator($uniqueGuardKey, GuardAuthenticatorIn
         $request = $event->getRequest();
         try {
             if (null !== $this->logger) {
-                $this->logger->debug('Calling getCredentials() on guard configurator.', array('firewall_key' => $this->providerKey, 'authenticator' => get_class($guardAuthenticator)));
+                $this->logger->debug('Calling getCredentials() on guard configurator.', array('firewall_key' => $this->providerKey, 'authenticator' => \get_class($guardAuthenticator)));
             }
 
             // allow the authenticator to fetch authentication info from the request
@@ -106,14 +106,14 @@ private function executeGuardAuthenticator($uniqueGuardKey, GuardAuthenticatorIn
             $token = new PreAuthenticationGuardToken($credentials, $uniqueGuardKey);
 
             if (null !== $this->logger) {
-                $this->logger->debug('Passing guard token information to the GuardAuthenticationProvider', array('firewall_key' => $this->providerKey, 'authenticator' => get_class($guardAuthenticator)));
+                $this->logger->debug('Passing guard token information to the GuardAuthenticationProvider', array('firewall_key' => $this->providerKey, 'authenticator' => \get_class($guardAuthenticator)));
             }
             // pass the token into the AuthenticationManager system
             // this indirectly calls GuardAuthenticationProvider::authenticate()
             $token = $this->authenticationManager->authenticate($token);
 
             if (null !== $this->logger) {
-                $this->logger->info('Guard authentication successful!', array('token' => $token, 'authenticator' => get_class($guardAuthenticator)));
+                $this->logger->info('Guard authentication successful!', array('token' => $token, 'authenticator' => \get_class($guardAuthenticator)));
             }
 
             // sets the token on the token storage, etc
@@ -122,7 +122,7 @@ private function executeGuardAuthenticator($uniqueGuardKey, GuardAuthenticatorIn
             // oh no! Authentication failed!
 
             if (null !== $this->logger) {
-                $this->logger->info('Guard authentication failed.', array('exception' => $e, 'authenticator' => get_class($guardAuthenticator)));
+                $this->logger->info('Guard authentication failed.', array('exception' => $e, 'authenticator' => \get_class($guardAuthenticator)));
             }
 
             $response = $this->guardHandler->handleAuthenticationFailure($e, $request, $guardAuthenticator, $this->providerKey);
@@ -138,13 +138,13 @@ private function executeGuardAuthenticator($uniqueGuardKey, GuardAuthenticatorIn
         $response = $this->guardHandler->handleAuthenticationSuccess($token, $request, $guardAuthenticator, $this->providerKey);
         if ($response instanceof Response) {
             if (null !== $this->logger) {
-                $this->logger->debug('Guard authenticator set success response.', array('response' => $response, 'authenticator' => get_class($guardAuthenticator)));
+                $this->logger->debug('Guard authenticator set success response.', array('response' => $response, 'authenticator' => \get_class($guardAuthenticator)));
             }
 
             $event->setResponse($response);
         } else {
             if (null !== $this->logger) {
-                $this->logger->debug('Guard authenticator set no success response: request continues.', array('authenticator' => get_class($guardAuthenticator)));
+                $this->logger->debug('Guard authenticator set no success response: request continues.', array('authenticator' => \get_class($guardAuthenticator)));
             }
         }
 
@@ -175,7 +175,7 @@ private function triggerRememberMe(GuardAuthenticatorInterface $guardAuthenticat
     {
         if (null === $this->rememberMeServices) {
             if (null !== $this->logger) {
-                $this->logger->debug('Remember me skipped: it is not configured for the firewall.', array('authenticator' => get_class($guardAuthenticator)));
+                $this->logger->debug('Remember me skipped: it is not configured for the firewall.', array('authenticator' => \get_class($guardAuthenticator)));
             }
 
             return;
@@ -183,7 +183,7 @@ private function triggerRememberMe(GuardAuthenticatorInterface $guardAuthenticat
 
         if (!$guardAuthenticator->supportsRememberMe()) {
             if (null !== $this->logger) {
-                $this->logger->debug('Remember me skipped: your authenticator does not support it.', array('authenticator' => get_class($guardAuthenticator)));
+                $this->logger->debug('Remember me skipped: your authenticator does not support it.', array('authenticator' => \get_class($guardAuthenticator)));
             }
 
             return;
@@ -192,7 +192,7 @@ private function triggerRememberMe(GuardAuthenticatorInterface $guardAuthenticat
         if (!$response instanceof Response) {
             throw new \LogicException(sprintf(
                 '%s::onAuthenticationSuccess *must* return a Response if you want to use the remember me functionality. Return a Response, or set remember_me to false under the guard configuration.',
-                get_class($guardAuthenticator)
+                \get_class($guardAuthenticator)
             ));
         }
 
diff --git a/src/Symfony/Component/Security/Guard/GuardAuthenticatorHandler.php b/src/Symfony/Component/Security/Guard/GuardAuthenticatorHandler.php
index d715c805824e..00e6bfb06982 100644
--- a/src/Symfony/Component/Security/Guard/GuardAuthenticatorHandler.php
+++ b/src/Symfony/Component/Security/Guard/GuardAuthenticatorHandler.php
@@ -86,8 +86,8 @@ public function handleAuthenticationSuccess(TokenInterface $token, Request $requ
 
         throw new \UnexpectedValueException(sprintf(
             'The %s::onAuthenticationSuccess method must return null or a Response object. You returned %s.',
-            get_class($guardAuthenticator),
-            is_object($response) ? get_class($response) : gettype($response)
+            \get_class($guardAuthenticator),
+            \is_object($response) ? \get_class($response) : \gettype($response)
         ));
     }
 
@@ -134,8 +134,8 @@ public function handleAuthenticationFailure(AuthenticationException $authenticat
 
         throw new \UnexpectedValueException(sprintf(
             'The %s::onAuthenticationFailure method must return null or a Response object. You returned %s.',
-            get_class($guardAuthenticator),
-            is_object($response) ? get_class($response) : gettype($response)
+            \get_class($guardAuthenticator),
+            \is_object($response) ? \get_class($response) : \gettype($response)
         ));
     }
 
diff --git a/src/Symfony/Component/Security/Guard/Provider/GuardAuthenticationProvider.php b/src/Symfony/Component/Security/Guard/Provider/GuardAuthenticationProvider.php
index b9e1f66abb85..e8d87a8888bf 100644
--- a/src/Symfony/Component/Security/Guard/Provider/GuardAuthenticationProvider.php
+++ b/src/Symfony/Component/Security/Guard/Provider/GuardAuthenticationProvider.php
@@ -103,23 +103,23 @@ private function authenticateViaGuard(GuardAuthenticatorInterface $guardAuthenti
         $user = $guardAuthenticator->getUser($token->getCredentials(), $this->userProvider);
 
         if (null === $user) {
-            throw new UsernameNotFoundException(sprintf('Null returned from %s::getUser()', get_class($guardAuthenticator)));
+            throw new UsernameNotFoundException(sprintf('Null returned from %s::getUser()', \get_class($guardAuthenticator)));
         }
 
         if (!$user instanceof UserInterface) {
-            throw new \UnexpectedValueException(sprintf('The %s::getUser() method must return a UserInterface. You returned %s.', get_class($guardAuthenticator), is_object($user) ? get_class($user) : gettype($user)));
+            throw new \UnexpectedValueException(sprintf('The %s::getUser() method must return a UserInterface. You returned %s.', \get_class($guardAuthenticator), \is_object($user) ? \get_class($user) : \gettype($user)));
         }
 
         $this->userChecker->checkPreAuth($user);
         if (true !== $guardAuthenticator->checkCredentials($token->getCredentials(), $user)) {
-            throw new BadCredentialsException(sprintf('Authentication failed because %s::checkCredentials() did not return true.', get_class($guardAuthenticator)));
+            throw new BadCredentialsException(sprintf('Authentication failed because %s::checkCredentials() did not return true.', \get_class($guardAuthenticator)));
         }
         $this->userChecker->checkPostAuth($user);
 
         // turn the UserInterface into a TokenInterface
         $authenticatedToken = $guardAuthenticator->createAuthenticatedToken($user, $this->providerKey);
         if (!$authenticatedToken instanceof TokenInterface) {
-            throw new \UnexpectedValueException(sprintf('The %s::createAuthenticatedToken() method must return a TokenInterface. You returned %s.', get_class($guardAuthenticator), is_object($authenticatedToken) ? get_class($authenticatedToken) : gettype($authenticatedToken)));
+            throw new \UnexpectedValueException(sprintf('The %s::createAuthenticatedToken() method must return a TokenInterface. You returned %s.', \get_class($guardAuthenticator), \is_object($authenticatedToken) ? \get_class($authenticatedToken) : \gettype($authenticatedToken)));
         }
 
         return $authenticatedToken;
diff --git a/src/Symfony/Component/Security/Http/Authentication/SimpleAuthenticationHandler.php b/src/Symfony/Component/Security/Http/Authentication/SimpleAuthenticationHandler.php
index 669dc13489fe..cca44c26f017 100644
--- a/src/Symfony/Component/Security/Http/Authentication/SimpleAuthenticationHandler.php
+++ b/src/Symfony/Component/Security/Http/Authentication/SimpleAuthenticationHandler.php
@@ -55,7 +55,7 @@ public function onAuthenticationSuccess(Request $request, TokenInterface $token)
     {
         if ($this->simpleAuthenticator instanceof AuthenticationSuccessHandlerInterface) {
             if ($this->logger) {
-                $this->logger->debug('Selected an authentication success handler.', array('handler' => get_class($this->simpleAuthenticator)));
+                $this->logger->debug('Selected an authentication success handler.', array('handler' => \get_class($this->simpleAuthenticator)));
             }
 
             $response = $this->simpleAuthenticator->onAuthenticationSuccess($request, $token);
@@ -64,7 +64,7 @@ public function onAuthenticationSuccess(Request $request, TokenInterface $token)
             }
 
             if (null !== $response) {
-                throw new \UnexpectedValueException(sprintf('The %s::onAuthenticationSuccess method must return null to use the default success handler, or a Response object', get_class($this->simpleAuthenticator)));
+                throw new \UnexpectedValueException(sprintf('The %s::onAuthenticationSuccess method must return null to use the default success handler, or a Response object', \get_class($this->simpleAuthenticator)));
             }
         }
 
@@ -82,7 +82,7 @@ public function onAuthenticationFailure(Request $request, AuthenticationExceptio
     {
         if ($this->simpleAuthenticator instanceof AuthenticationFailureHandlerInterface) {
             if ($this->logger) {
-                $this->logger->debug('Selected an authentication failure handler.', array('handler' => get_class($this->simpleAuthenticator)));
+                $this->logger->debug('Selected an authentication failure handler.', array('handler' => \get_class($this->simpleAuthenticator)));
             }
 
             $response = $this->simpleAuthenticator->onAuthenticationFailure($request, $exception);
@@ -91,7 +91,7 @@ public function onAuthenticationFailure(Request $request, AuthenticationExceptio
             }
 
             if (null !== $response) {
-                throw new \UnexpectedValueException(sprintf('The %s::onAuthenticationFailure method must return null to use the default failure handler, or a Response object', get_class($this->simpleAuthenticator)));
+                throw new \UnexpectedValueException(sprintf('The %s::onAuthenticationFailure method must return null to use the default failure handler, or a Response object', \get_class($this->simpleAuthenticator)));
             }
         }
 
diff --git a/src/Symfony/Component/Security/Http/Firewall/ContextListener.php b/src/Symfony/Component/Security/Http/Firewall/ContextListener.php
index 2c315b99448a..68d07682d5f5 100644
--- a/src/Symfony/Component/Security/Http/Firewall/ContextListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/ContextListener.php
@@ -47,7 +47,7 @@ public function __construct(TokenStorageInterface $tokenStorage, array $userProv
 
         foreach ($userProviders as $userProvider) {
             if (!$userProvider instanceof UserProviderInterface) {
-                throw new \InvalidArgumentException(sprintf('User provider "%s" must implement "Symfony\Component\Security\Core\User\UserProviderInterface".', get_class($userProvider)));
+                throw new \InvalidArgumentException(sprintf('User provider "%s" must implement "Symfony\Component\Security\Core\User\UserProviderInterface".', \get_class($userProvider)));
             }
         }
 
@@ -150,7 +150,7 @@ protected function refreshUser(TokenInterface $token)
                 $token->setUser($refreshedUser);
 
                 if (null !== $this->logger) {
-                    $this->logger->debug('User was reloaded from a user provider.', array('username' => $refreshedUser->getUsername(), 'provider' => get_class($provider)));
+                    $this->logger->debug('User was reloaded from a user provider.', array('username' => $refreshedUser->getUsername(), 'provider' => \get_class($provider)));
                 }
 
                 return $token;
@@ -158,7 +158,7 @@ protected function refreshUser(TokenInterface $token)
                 // let's try the next user provider
             } catch (UsernameNotFoundException $e) {
                 if (null !== $this->logger) {
-                    $this->logger->warning('Username could not be found in the selected user provider.', array('username' => $e->getUsername(), 'provider' => get_class($provider)));
+                    $this->logger->warning('Username could not be found in the selected user provider.', array('username' => $e->getUsername(), 'provider' => \get_class($provider)));
                 }
 
                 $userNotFoundByProvider = true;
@@ -169,7 +169,7 @@ protected function refreshUser(TokenInterface $token)
             return null;
         }
 
-        throw new \RuntimeException(sprintf('There is no user provider for user "%s".', get_class($user)));
+        throw new \RuntimeException(sprintf('There is no user provider for user "%s".', \get_class($user)));
     }
 
     private function safelyUnserialize($serializedToken)
diff --git a/src/Symfony/Component/Security/Http/Firewall/DigestAuthenticationListener.php b/src/Symfony/Component/Security/Http/Firewall/DigestAuthenticationListener.php
index 5bc3c5ea94df..b2f6e48a769f 100644
--- a/src/Symfony/Component/Security/Http/Firewall/DigestAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/DigestAuthenticationListener.php
@@ -207,7 +207,7 @@ public function validateAndDecode($entryPointKey, $expectedRealm)
 
         $nonceTokens = explode(':', $nonceAsPlainText);
 
-        if (2 !== count($nonceTokens)) {
+        if (2 !== \count($nonceTokens)) {
             throw new BadCredentialsException(sprintf('Nonce should have yielded two tokens but was "%s".', $nonceAsPlainText));
         }
 
diff --git a/src/Symfony/Component/Security/Http/Firewall/SimplePreAuthenticationListener.php b/src/Symfony/Component/Security/Http/Firewall/SimplePreAuthenticationListener.php
index 9cb90edbe65f..d208db4e1b65 100644
--- a/src/Symfony/Component/Security/Http/Firewall/SimplePreAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/SimplePreAuthenticationListener.php
@@ -83,7 +83,7 @@ public function handle(GetResponseEvent $event)
         $request = $event->getRequest();
 
         if (null !== $this->logger) {
-            $this->logger->info('Attempting SimplePreAuthentication.', array('key' => $this->providerKey, 'authenticator' => get_class($this->simpleAuthenticator)));
+            $this->logger->info('Attempting SimplePreAuthentication.', array('key' => $this->providerKey, 'authenticator' => \get_class($this->simpleAuthenticator)));
         }
 
         if (null !== $this->tokenStorage->getToken() && !$this->tokenStorage->getToken() instanceof AnonymousToken) {
@@ -112,7 +112,7 @@ public function handle(GetResponseEvent $event)
             $this->tokenStorage->setToken(null);
 
             if (null !== $this->logger) {
-                $this->logger->info('SimplePreAuthentication request failed.', array('exception' => $e, 'authenticator' => get_class($this->simpleAuthenticator)));
+                $this->logger->info('SimplePreAuthentication request failed.', array('exception' => $e, 'authenticator' => \get_class($this->simpleAuthenticator)));
             }
 
             if ($this->simpleAuthenticator instanceof AuthenticationFailureHandlerInterface) {
@@ -120,7 +120,7 @@ public function handle(GetResponseEvent $event)
                 if ($response instanceof Response) {
                     $event->setResponse($response);
                 } elseif (null !== $response) {
-                    throw new \UnexpectedValueException(sprintf('The %s::onAuthenticationFailure method must return null or a Response object', get_class($this->simpleAuthenticator)));
+                    throw new \UnexpectedValueException(sprintf('The %s::onAuthenticationFailure method must return null or a Response object', \get_class($this->simpleAuthenticator)));
                 }
             }
 
@@ -132,7 +132,7 @@ public function handle(GetResponseEvent $event)
             if ($response instanceof Response) {
                 $event->setResponse($response);
             } elseif (null !== $response) {
-                throw new \UnexpectedValueException(sprintf('The %s::onAuthenticationSuccess method must return null or a Response object', get_class($this->simpleAuthenticator)));
+                throw new \UnexpectedValueException(sprintf('The %s::onAuthenticationSuccess method must return null or a Response object', \get_class($this->simpleAuthenticator)));
             }
         }
     }
diff --git a/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php b/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php
index f8466278da63..4627223f48f5 100644
--- a/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php
@@ -110,7 +110,7 @@ protected function attemptAuthentication(Request $request)
 
         $username = trim($username);
 
-        if (strlen($username) > Security::MAX_USERNAME_LENGTH) {
+        if (\strlen($username) > Security::MAX_USERNAME_LENGTH) {
             throw new BadCredentialsException('Invalid username.');
         }
 
diff --git a/src/Symfony/Component/Security/Http/RememberMe/AbstractRememberMeServices.php b/src/Symfony/Component/Security/Http/RememberMe/AbstractRememberMeServices.php
index 2b17523fae3c..4a865500e9e5 100644
--- a/src/Symfony/Component/Security/Http/RememberMe/AbstractRememberMeServices.php
+++ b/src/Symfony/Component/Security/Http/RememberMe/AbstractRememberMeServices.php
@@ -60,7 +60,7 @@ public function __construct(array $userProviders, $secret, $providerKey, array $
         if (empty($providerKey)) {
             throw new \InvalidArgumentException('$providerKey must not be empty.');
         }
-        if (0 === count($userProviders)) {
+        if (0 === \count($userProviders)) {
             throw new \InvalidArgumentException('You must provide at least one user provider.');
         }
 
diff --git a/src/Symfony/Component/Security/Http/RememberMe/PersistentTokenBasedRememberMeServices.php b/src/Symfony/Component/Security/Http/RememberMe/PersistentTokenBasedRememberMeServices.php
index cd3f17b4a77a..ef4e30b748c4 100644
--- a/src/Symfony/Component/Security/Http/RememberMe/PersistentTokenBasedRememberMeServices.php
+++ b/src/Symfony/Component/Security/Http/RememberMe/PersistentTokenBasedRememberMeServices.php
@@ -67,7 +67,7 @@ protected function cancelCookie(Request $request)
 
         // Delete cookie from the tokenProvider
         if (null !== ($cookie = $request->cookies->get($this->options['name']))
-            && 2 === count($parts = $this->decodeCookie($cookie))
+            && 2 === \count($parts = $this->decodeCookie($cookie))
         ) {
             list($series) = $parts;
             $this->tokenProvider->deleteTokenBySeries($series);
@@ -79,7 +79,7 @@ protected function cancelCookie(Request $request)
      */
     protected function processAutoLoginCookie(array $cookieParts, Request $request)
     {
-        if (2 !== count($cookieParts)) {
+        if (2 !== \count($cookieParts)) {
             throw new AuthenticationException('The cookie is invalid.');
         }
 
@@ -121,7 +121,7 @@ protected function onLoginSuccess(Request $request, Response $response, TokenInt
 
         $this->tokenProvider->createNewToken(
             new PersistentToken(
-                get_class($user = $token->getUser()),
+                \get_class($user = $token->getUser()),
                 $user->getUsername(),
                 $series,
                 $tokenValue,
diff --git a/src/Symfony/Component/Security/Http/RememberMe/TokenBasedRememberMeServices.php b/src/Symfony/Component/Security/Http/RememberMe/TokenBasedRememberMeServices.php
index d6254dff0a2a..dce2026f3a13 100644
--- a/src/Symfony/Component/Security/Http/RememberMe/TokenBasedRememberMeServices.php
+++ b/src/Symfony/Component/Security/Http/RememberMe/TokenBasedRememberMeServices.php
@@ -31,7 +31,7 @@ class TokenBasedRememberMeServices extends AbstractRememberMeServices
      */
     protected function processAutoLoginCookie(array $cookieParts, Request $request)
     {
-        if (4 !== count($cookieParts)) {
+        if (4 !== \count($cookieParts)) {
             throw new AuthenticationException('The cookie is invalid.');
         }
 
@@ -50,7 +50,7 @@ protected function processAutoLoginCookie(array $cookieParts, Request $request)
         }
 
         if (!$user instanceof UserInterface) {
-            throw new \RuntimeException(sprintf('The UserProviderInterface implementation must return an instance of UserInterface, but returned "%s".', get_class($user)));
+            throw new \RuntimeException(sprintf('The UserProviderInterface implementation must return an instance of UserInterface, but returned "%s".', \get_class($user)));
         }
 
         if (true !== hash_equals($this->generateCookieHash($class, $username, $expires, $user->getPassword()), $hash)) {
@@ -71,7 +71,7 @@ protected function onLoginSuccess(Request $request, Response $response, TokenInt
     {
         $user = $token->getUser();
         $expires = time() + $this->options['lifetime'];
-        $value = $this->generateCookieValue(get_class($user), $user->getUsername(), $expires, $user->getPassword());
+        $value = $this->generateCookieValue(\get_class($user), $user->getUsername(), $expires, $user->getPassword());
 
         $response->headers->setCookie(
             new Cookie(
diff --git a/src/Symfony/Component/Security/Http/Tests/RememberMe/AbstractRememberMeServicesTest.php b/src/Symfony/Component/Security/Http/Tests/RememberMe/AbstractRememberMeServicesTest.php
index 886743c1d355..a60fda707de0 100644
--- a/src/Symfony/Component/Security/Http/Tests/RememberMe/AbstractRememberMeServicesTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/RememberMe/AbstractRememberMeServicesTest.php
@@ -304,7 +304,7 @@ protected function getProvider()
 
     private function callProtected($object, $method, array $args)
     {
-        $reflection = new \ReflectionClass(get_class($object));
+        $reflection = new \ReflectionClass(\get_class($object));
         $reflectionMethod = $reflection->getMethod($method);
         $reflectionMethod->setAccessible(true);
 
diff --git a/src/Symfony/Component/Security/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Security/Tests/Resources/TranslationFilesTest.php
index e02a0648743f..7a197e8038f6 100644
--- a/src/Symfony/Component/Security/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Security/Tests/Resources/TranslationFilesTest.php
@@ -33,15 +33,15 @@ public function provideTranslationFiles()
     {
         return array_map(
             function ($filePath) { return (array) $filePath; },
-            glob(dirname(dirname(__DIR__)).'/Resources/translations/*.xlf')
+            glob(\dirname(\dirname(__DIR__)).'/Resources/translations/*.xlf')
         );
     }
 
     public function testNorwegianAlias()
     {
         $this->assertFileEquals(
-            dirname(dirname(__DIR__)).'/Resources/translations/security.nb.xlf',
-            dirname(dirname(__DIR__)).'/Resources/translations/security.no.xlf',
+            \dirname(\dirname(__DIR__)).'/Resources/translations/security.nb.xlf',
+            \dirname(\dirname(__DIR__)).'/Resources/translations/security.no.xlf',
             'The NO locale should be an alias for the NB variant of the Norwegian language.'
         );
     }
diff --git a/src/Symfony/Component/Serializer/Normalizer/ArrayDenormalizer.php b/src/Symfony/Component/Serializer/Normalizer/ArrayDenormalizer.php
index 0eb35727bb8a..e928a5949af1 100644
--- a/src/Symfony/Component/Serializer/Normalizer/ArrayDenormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/ArrayDenormalizer.php
@@ -36,8 +36,8 @@ public function denormalize($data, $class, $format = null, array $context = arra
         if (null === $this->serializer) {
             throw new BadMethodCallException('Please set a serializer before calling denormalize()!');
         }
-        if (!is_array($data)) {
-            throw new InvalidArgumentException('Data expected to be an array, '.gettype($data).' given.');
+        if (!\is_array($data)) {
+            throw new InvalidArgumentException('Data expected to be an array, '.\gettype($data).' given.');
         }
         if ('[]' !== substr($class, -2)) {
             throw new InvalidArgumentException('Unsupported class: '.$class);
diff --git a/src/Symfony/Component/Serializer/Normalizer/ObjectNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/ObjectNormalizer.php
index 9c0da74adc69..edca54315dc0 100644
--- a/src/Symfony/Component/Serializer/Normalizer/ObjectNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/ObjectNormalizer.php
@@ -158,7 +158,7 @@ private function getCacheKey(array $context)
      */
     private function getAttributes($object, array $context)
     {
-        $class = get_class($object);
+        $class = \get_class($object);
         $key = $class.'-'.$context['cache_key'];
 
         if (isset($this->attributesCache[$key])) {
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/CustomNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/CustomNormalizerTest.php
index 10ebc2f9f2c7..bf8f299af5c7 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/CustomNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/CustomNormalizerTest.php
@@ -46,11 +46,11 @@ public function testSerialize()
 
     public function testDeserialize()
     {
-        $obj = $this->normalizer->denormalize('foo', get_class(new ScalarDummy()), 'xml');
+        $obj = $this->normalizer->denormalize('foo', \get_class(new ScalarDummy()), 'xml');
         $this->assertEquals('foo', $obj->xmlFoo);
         $this->assertNull($obj->foo);
 
-        $obj = $this->normalizer->denormalize('foo', get_class(new ScalarDummy()), 'json');
+        $obj = $this->normalizer->denormalize('foo', \get_class(new ScalarDummy()), 'json');
         $this->assertEquals('foo', $obj->foo);
         $this->assertNull($obj->xmlFoo);
     }
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php
index 52b46b8f8f22..1a50e0d94927 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php
@@ -455,7 +455,7 @@ public function provideCallbacks()
             array(
                 array(
                     'bar' => function ($bars) {
-                        return count($bars);
+                        return \count($bars);
                     },
                 ),
                 array(new GetConstructorDummy('baz', '', false), new GetConstructorDummy('quux', '', false)),
@@ -515,7 +515,7 @@ public function testCircularReferenceHandler()
         $serializer = new Serializer(array($this->normalizer));
         $this->normalizer->setSerializer($serializer);
         $this->normalizer->setCircularReferenceHandler(function ($obj) {
-            return get_class($obj);
+            return \get_class($obj);
         });
 
         $obj = new CircularReferenceDummy();
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
index 1f735cc243b9..51abd7c63d51 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
@@ -401,7 +401,7 @@ public function provideCallbacks()
             array(
                 array(
                     'bar' => function ($bars) {
-                        return count($bars);
+                        return \count($bars);
                     },
                 ),
                 array(new ObjectConstructorDummy('baz', '', false), new ObjectConstructorDummy('quux', '', false)),
@@ -461,7 +461,7 @@ public function testCircularReferenceHandler()
         $serializer = new Serializer(array($this->normalizer));
         $this->normalizer->setSerializer($serializer);
         $this->normalizer->setCircularReferenceHandler(function ($obj) {
-            return get_class($obj);
+            return \get_class($obj);
         });
 
         $obj = new CircularReferenceDummy();
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/PropertyNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/PropertyNormalizerTest.php
index d39c3dd196d3..6817eaa10a4e 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/PropertyNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/PropertyNormalizerTest.php
@@ -349,7 +349,7 @@ public function provideCallbacks()
             array(
                 array(
                     'bar' => function ($bars) {
-                        return count($bars);
+                        return \count($bars);
                     },
                 ),
                 array(new PropertyConstructorDummy('baz', ''), new PropertyConstructorDummy('quux', '')),
@@ -393,7 +393,7 @@ public function testCircularReferenceHandler()
         $serializer = new Serializer(array($this->normalizer));
         $this->normalizer->setSerializer($serializer);
         $this->normalizer->setCircularReferenceHandler(function ($obj) {
-            return get_class($obj);
+            return \get_class($obj);
         });
 
         $obj = new PropertyCircularReferenceDummy();
diff --git a/src/Symfony/Component/Stopwatch/Stopwatch.php b/src/Symfony/Component/Stopwatch/Stopwatch.php
index 6663632bdc88..462bc0351a21 100644
--- a/src/Symfony/Component/Stopwatch/Stopwatch.php
+++ b/src/Symfony/Component/Stopwatch/Stopwatch.php
@@ -76,7 +76,7 @@ public function stopSection($id)
     {
         $this->stop('__section__');
 
-        if (1 == count($this->activeSections)) {
+        if (1 == \count($this->activeSections)) {
             throw new \LogicException('There is no started section to stop.');
         }
 
diff --git a/src/Symfony/Component/Stopwatch/StopwatchEvent.php b/src/Symfony/Component/Stopwatch/StopwatchEvent.php
index 5fdd62e6e0b1..3b8b4b8df92b 100644
--- a/src/Symfony/Component/Stopwatch/StopwatchEvent.php
+++ b/src/Symfony/Component/Stopwatch/StopwatchEvent.php
@@ -47,7 +47,7 @@ class StopwatchEvent
     public function __construct($origin, $category = null)
     {
         $this->origin = $this->formatTime($origin);
-        $this->category = is_string($category) ? $category : 'default';
+        $this->category = \is_string($category) ? $category : 'default';
     }
 
     /**
@@ -91,7 +91,7 @@ public function start()
      */
     public function stop()
     {
-        if (!count($this->started)) {
+        if (!\count($this->started)) {
             throw new \LogicException('stop() called but start() has not been called before.');
         }
 
@@ -125,7 +125,7 @@ public function lap()
      */
     public function ensureStopped()
     {
-        while (count($this->started)) {
+        while (\count($this->started)) {
             $this->stop();
         }
     }
@@ -157,7 +157,7 @@ public function getStartTime()
      */
     public function getEndTime()
     {
-        $count = count($this->periods);
+        $count = \count($this->periods);
 
         return $count ? $this->periods[$count - 1]->getEndTime() : 0;
     }
@@ -170,8 +170,8 @@ public function getEndTime()
     public function getDuration()
     {
         $periods = $this->periods;
-        $stopped = count($periods);
-        $left = count($this->started) - $stopped;
+        $stopped = \count($periods);
+        $left = \count($this->started) - $stopped;
 
         for ($i = 0; $i < $left; ++$i) {
             $index = $stopped + $i;
diff --git a/src/Symfony/Component/Templating/Asset/UrlPackage.php b/src/Symfony/Component/Templating/Asset/UrlPackage.php
index 104dd3a00a23..c4d90314f3da 100644
--- a/src/Symfony/Component/Templating/Asset/UrlPackage.php
+++ b/src/Symfony/Component/Templating/Asset/UrlPackage.php
@@ -33,7 +33,7 @@ public function __construct($baseUrls = array(), $version = null, $format = null
     {
         parent::__construct($version, $format);
 
-        if (!is_array($baseUrls)) {
+        if (!\is_array($baseUrls)) {
             $baseUrls = (array) $baseUrls;
         }
 
@@ -70,7 +70,7 @@ public function getUrl($path, $version = null)
      */
     public function getBaseUrl($path)
     {
-        switch ($count = count($this->baseUrls)) {
+        switch ($count = \count($this->baseUrls)) {
             case 0:
                 return '';
 
diff --git a/src/Symfony/Component/Templating/Helper/SlotsHelper.php b/src/Symfony/Component/Templating/Helper/SlotsHelper.php
index 8fa5ff5ff2a7..e5faf7fe8871 100644
--- a/src/Symfony/Component/Templating/Helper/SlotsHelper.php
+++ b/src/Symfony/Component/Templating/Helper/SlotsHelper.php
@@ -33,7 +33,7 @@ class SlotsHelper extends Helper
      */
     public function start($name)
     {
-        if (in_array($name, $this->openSlots)) {
+        if (\in_array($name, $this->openSlots)) {
             throw new \InvalidArgumentException(sprintf('A slot named "%s" is already started.', $name));
         }
 
diff --git a/src/Symfony/Component/Templating/Loader/FilesystemLoader.php b/src/Symfony/Component/Templating/Loader/FilesystemLoader.php
index 79a7a6a3eadd..1f1838cdc988 100644
--- a/src/Symfony/Component/Templating/Loader/FilesystemLoader.php
+++ b/src/Symfony/Component/Templating/Loader/FilesystemLoader.php
@@ -108,7 +108,7 @@ public function isFresh(TemplateReferenceInterface $template, $time)
     protected static function isAbsolutePath($file)
     {
         if ('/' == $file[0] || '\\' == $file[0]
-            || (strlen($file) > 3 && ctype_alpha($file[0])
+            || (\strlen($file) > 3 && ctype_alpha($file[0])
                 && ':' == $file[1]
                 && ('\\' == $file[2] || '/' == $file[2])
             )
diff --git a/src/Symfony/Component/Templating/PhpEngine.php b/src/Symfony/Component/Templating/PhpEngine.php
index 377ee46a4305..1d6ccfd34249 100644
--- a/src/Symfony/Component/Templating/PhpEngine.php
+++ b/src/Symfony/Component/Templating/PhpEngine.php
@@ -224,7 +224,7 @@ public function offsetUnset($name)
     public function addHelpers(array $helpers)
     {
         foreach ($helpers as $alias => $helper) {
-            $this->set($helper, is_int($alias) ? null : $alias);
+            $this->set($helper, \is_int($alias) ? null : $alias);
         }
     }
 
@@ -313,13 +313,13 @@ public function escape($value, $context = 'html')
         // the performance when the same value is escaped multiple times (e.g. loops)
         if (is_scalar($value)) {
             if (!isset(self::$escaperCache[$context][$value])) {
-                self::$escaperCache[$context][$value] = call_user_func($this->getEscaper($context), $value);
+                self::$escaperCache[$context][$value] = \call_user_func($this->getEscaper($context), $value);
             }
 
             return self::$escaperCache[$context][$value];
         }
 
-        return call_user_func($this->getEscaper($context), $value);
+        return \call_user_func($this->getEscaper($context), $value);
     }
 
     /**
@@ -436,7 +436,7 @@ protected function initializeEscapers()
                 function ($value) use ($that, $flags) {
                     // Numbers and Boolean values get turned into strings which can cause problems
                     // with type comparisons (e.g. === or is_int() etc).
-                    return is_string($value) ? htmlspecialchars($value, $flags, $that->getCharset(), false) : $value;
+                    return \is_string($value) ? htmlspecialchars($value, $flags, $that->getCharset(), false) : $value;
                 },
 
             'js' =>
diff --git a/src/Symfony/Component/Translation/Catalogue/AbstractOperation.php b/src/Symfony/Component/Translation/Catalogue/AbstractOperation.php
index bc5735a3c5b8..4f0e26fa9729 100644
--- a/src/Symfony/Component/Translation/Catalogue/AbstractOperation.php
+++ b/src/Symfony/Component/Translation/Catalogue/AbstractOperation.php
@@ -89,7 +89,7 @@ public function getDomains()
      */
     public function getMessages($domain)
     {
-        if (!in_array($domain, $this->getDomains())) {
+        if (!\in_array($domain, $this->getDomains())) {
             throw new \InvalidArgumentException(sprintf('Invalid domain: %s.', $domain));
         }
 
@@ -105,7 +105,7 @@ public function getMessages($domain)
      */
     public function getNewMessages($domain)
     {
-        if (!in_array($domain, $this->getDomains())) {
+        if (!\in_array($domain, $this->getDomains())) {
             throw new \InvalidArgumentException(sprintf('Invalid domain: %s.', $domain));
         }
 
@@ -121,7 +121,7 @@ public function getNewMessages($domain)
      */
     public function getObsoleteMessages($domain)
     {
-        if (!in_array($domain, $this->getDomains())) {
+        if (!\in_array($domain, $this->getDomains())) {
             throw new \InvalidArgumentException(sprintf('Invalid domain: %s.', $domain));
         }
 
diff --git a/src/Symfony/Component/Translation/DataCollector/TranslationDataCollector.php b/src/Symfony/Component/Translation/DataCollector/TranslationDataCollector.php
index a80bd152549d..8da0f77d430f 100644
--- a/src/Symfony/Component/Translation/DataCollector/TranslationDataCollector.php
+++ b/src/Symfony/Component/Translation/DataCollector/TranslationDataCollector.php
@@ -135,7 +135,7 @@ private function sanitizeString($string, $length = 80)
             if (mb_strlen($string, $encoding) > $length) {
                 return mb_substr($string, 0, $length - 3, $encoding).'...';
             }
-        } elseif (strlen($string) > $length) {
+        } elseif (\strlen($string) > $length) {
             return substr($string, 0, $length - 3).'...';
         }
 
diff --git a/src/Symfony/Component/Translation/DataCollectorTranslator.php b/src/Symfony/Component/Translation/DataCollectorTranslator.php
index 85c3c26b5f58..2916eb9688de 100644
--- a/src/Symfony/Component/Translation/DataCollectorTranslator.php
+++ b/src/Symfony/Component/Translation/DataCollectorTranslator.php
@@ -33,7 +33,7 @@ class DataCollectorTranslator implements TranslatorInterface, TranslatorBagInter
     public function __construct(TranslatorInterface $translator)
     {
         if (!$translator instanceof TranslatorBagInterface) {
-            throw new \InvalidArgumentException(sprintf('The Translator "%s" must implement TranslatorInterface and TranslatorBagInterface.', get_class($translator)));
+            throw new \InvalidArgumentException(sprintf('The Translator "%s" must implement TranslatorInterface and TranslatorBagInterface.', \get_class($translator)));
         }
 
         $this->translator = $translator;
@@ -104,7 +104,7 @@ public function getFallbackLocales()
      */
     public function __call($method, $args)
     {
-        return call_user_func_array(array($this->translator, $method), $args);
+        return \call_user_func_array(array($this->translator, $method), $args);
     }
 
     /**
diff --git a/src/Symfony/Component/Translation/Dumper/FileDumper.php b/src/Symfony/Component/Translation/Dumper/FileDumper.php
index b217d108a508..ad37cbee3f60 100644
--- a/src/Symfony/Component/Translation/Dumper/FileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/FileDumper.php
@@ -76,7 +76,7 @@ public function dump(MessageCatalogue $messages, $options = array())
                     copy($fullpath, $fullpath.'~');
                 }
             } else {
-                $directory = dirname($fullpath);
+                $directory = \dirname($fullpath);
                 if (!file_exists($directory) && !@mkdir($directory, 0777, true)) {
                     throw new \RuntimeException(sprintf('Unable to create directory "%s".', $directory));
                 }
diff --git a/src/Symfony/Component/Translation/Dumper/IcuResFileDumper.php b/src/Symfony/Component/Translation/Dumper/IcuResFileDumper.php
index 8e33a4b30c28..a1f4b90a4bd4 100644
--- a/src/Symfony/Component/Translation/Dumper/IcuResFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/IcuResFileDumper.php
@@ -43,7 +43,7 @@ public function formatCatalogue(MessageCatalogue $messages, $domain, array $opti
         $data = $indexes = $resources = '';
 
         foreach ($messages->all($domain) as $source => $target) {
-            $indexes .= pack('v', strlen($data) + 28);
+            $indexes .= pack('v', \strlen($data) + 28);
             $data .= $source."\0";
         }
 
@@ -54,7 +54,7 @@ public function formatCatalogue(MessageCatalogue $messages, $domain, array $opti
         foreach ($messages->all($domain) as $source => $target) {
             $resources .= pack('V', $this->getPosition($data));
 
-            $data .= pack('V', strlen($target))
+            $data .= pack('V', \strlen($target))
                 .mb_convert_encoding($target."\0", 'UTF-16LE', 'UTF-8')
                 .$this->writePadding($data)
                   ;
@@ -62,7 +62,7 @@ public function formatCatalogue(MessageCatalogue $messages, $domain, array $opti
 
         $resOffset = $this->getPosition($data);
 
-        $data .= pack('v', count($messages->all($domain)))
+        $data .= pack('v', \count($messages->all($domain)))
             .$indexes
             .$this->writePadding($data)
             .$resources
@@ -76,7 +76,7 @@ public function formatCatalogue(MessageCatalogue $messages, $domain, array $opti
             $keyTop,                        // Index keys top
             $bundleTop,                     // Index resources top
             $bundleTop,                     // Index bundle top
-            count($messages->all($domain)), // Index max table length
+            \count($messages->all($domain)), // Index max table length
             0                               // Index attributes
         );
 
@@ -94,7 +94,7 @@ public function formatCatalogue(MessageCatalogue $messages, $domain, array $opti
 
     private function writePadding($data)
     {
-        $padding = strlen($data) % 4;
+        $padding = \strlen($data) % 4;
 
         if ($padding) {
             return str_repeat("\xAA", 4 - $padding);
@@ -103,7 +103,7 @@ private function writePadding($data)
 
     private function getPosition($data)
     {
-        return (strlen($data) + 28) / 4;
+        return (\strlen($data) + 28) / 4;
     }
 
     /**
diff --git a/src/Symfony/Component/Translation/Dumper/JsonFileDumper.php b/src/Symfony/Component/Translation/Dumper/JsonFileDumper.php
index 3e38beaab272..db9a2f8251f7 100644
--- a/src/Symfony/Component/Translation/Dumper/JsonFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/JsonFileDumper.php
@@ -38,7 +38,7 @@ public function formatCatalogue(MessageCatalogue $messages, $domain, array $opti
         if (isset($options['json_encoding'])) {
             $flags = $options['json_encoding'];
         } else {
-            $flags = defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT : 0;
+            $flags = \defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT : 0;
         }
 
         return json_encode($messages->all($domain), $flags);
diff --git a/src/Symfony/Component/Translation/Dumper/MoFileDumper.php b/src/Symfony/Component/Translation/Dumper/MoFileDumper.php
index e38e858ca2e6..a57e6ca6f2eb 100644
--- a/src/Symfony/Component/Translation/Dumper/MoFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/MoFileDumper.php
@@ -57,7 +57,7 @@ public function formatCatalogue(MessageCatalogue $messages, $domain, array $opti
             'offsetHashes' => MoFileLoader::MO_HEADER_SIZE + (16 * $size),
         );
 
-        $sourcesSize = strlen($sources);
+        $sourcesSize = \strlen($sources);
         $sourcesStart = $header['offsetHashes'] + 1;
 
         foreach ($offsets as $offset) {
diff --git a/src/Symfony/Component/Translation/Dumper/XliffFileDumper.php b/src/Symfony/Component/Translation/Dumper/XliffFileDumper.php
index 1ce06af27423..e0cbe5d8472b 100644
--- a/src/Symfony/Component/Translation/Dumper/XliffFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/XliffFileDumper.php
@@ -188,6 +188,6 @@ private function dumpXliff2($defaultLocale, MessageCatalogue $messages, $domain,
      */
     private function hasMetadataArrayInfo($key, $metadata = null)
     {
-        return null !== $metadata && array_key_exists($key, $metadata) && ($metadata[$key] instanceof \Traversable || is_array($metadata[$key]));
+        return null !== $metadata && array_key_exists($key, $metadata) && ($metadata[$key] instanceof \Traversable || \is_array($metadata[$key]));
     }
 }
diff --git a/src/Symfony/Component/Translation/Extractor/AbstractFileExtractor.php b/src/Symfony/Component/Translation/Extractor/AbstractFileExtractor.php
index e138e64056cb..0ae16844e97a 100644
--- a/src/Symfony/Component/Translation/Extractor/AbstractFileExtractor.php
+++ b/src/Symfony/Component/Translation/Extractor/AbstractFileExtractor.php
@@ -25,7 +25,7 @@ abstract class AbstractFileExtractor
      */
     protected function extractFiles($resource)
     {
-        if (is_array($resource) || $resource instanceof \Traversable) {
+        if (\is_array($resource) || $resource instanceof \Traversable) {
             $files = array();
             foreach ($resource as $file) {
                 if ($this->canBeExtracted($file)) {
diff --git a/src/Symfony/Component/Translation/Loader/ArrayLoader.php b/src/Symfony/Component/Translation/Loader/ArrayLoader.php
index 9a595b7dadab..7bbfca68a4b0 100644
--- a/src/Symfony/Component/Translation/Loader/ArrayLoader.php
+++ b/src/Symfony/Component/Translation/Loader/ArrayLoader.php
@@ -52,7 +52,7 @@ private function flatten(array &$messages, array $subnode = null, $path = null)
             $subnode = &$messages;
         }
         foreach ($subnode as $key => $value) {
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 $nodePath = $path ? $path.'.'.$key : $key;
                 $this->flatten($messages, $value, $nodePath);
                 if (null === $path) {
diff --git a/src/Symfony/Component/Translation/Loader/CsvFileLoader.php b/src/Symfony/Component/Translation/Loader/CsvFileLoader.php
index e454d16922ec..8a763e725d6d 100644
--- a/src/Symfony/Component/Translation/Loader/CsvFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/CsvFileLoader.php
@@ -41,7 +41,7 @@ protected function loadResource($resource)
         $file->setCsvControl($this->delimiter, $this->enclosure, $this->escape);
 
         foreach ($file as $data) {
-            if ('#' !== substr($data[0], 0, 1) && isset($data[1]) && 2 === count($data)) {
+            if ('#' !== substr($data[0], 0, 1) && isset($data[1]) && 2 === \count($data)) {
                 $messages[$data[0]] = $data[1];
             }
         }
diff --git a/src/Symfony/Component/Translation/Loader/FileLoader.php b/src/Symfony/Component/Translation/Loader/FileLoader.php
index 322679d24cdb..90a868263d95 100644
--- a/src/Symfony/Component/Translation/Loader/FileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/FileLoader.php
@@ -41,7 +41,7 @@ public function load($resource, $locale, $domain = 'messages')
         }
 
         // not an array
-        if (!is_array($messages)) {
+        if (!\is_array($messages)) {
             throw new InvalidResourceException(sprintf('Unable to load file "%s".', $resource));
         }
 
diff --git a/src/Symfony/Component/Translation/Loader/MoFileLoader.php b/src/Symfony/Component/Translation/Loader/MoFileLoader.php
index aad2bba22043..93ecffa66550 100644
--- a/src/Symfony/Component/Translation/Loader/MoFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/MoFileLoader.php
@@ -111,7 +111,7 @@ protected function loadResource($resource)
             $ids = array('singular' => $singularId, 'plural' => $pluralId);
             $item = compact('ids', 'translated');
 
-            if (is_array($item['translated'])) {
+            if (\is_array($item['translated'])) {
                 $messages[$item['ids']['singular']] = stripcslashes($item['translated'][0]);
                 if (isset($item['ids']['plural'])) {
                     $plurals = array();
diff --git a/src/Symfony/Component/Translation/Loader/PoFileLoader.php b/src/Symfony/Component/Translation/Loader/PoFileLoader.php
index 7ce7d2dfffe1..066168dc71d9 100644
--- a/src/Symfony/Component/Translation/Loader/PoFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/PoFileLoader.php
@@ -78,7 +78,7 @@ protected function loadResource($resource)
 
             if ('' === $line) {
                 // Whitespace indicated current item is done
-                if (!in_array('fuzzy', $flags)) {
+                if (!\in_array('fuzzy', $flags)) {
                     $this->addMessage($messages, $item);
                 }
                 $item = $defaults;
@@ -96,7 +96,7 @@ protected function loadResource($resource)
             } elseif ('"' === $line[0]) {
                 $continues = isset($item['translated']) ? 'translated' : 'ids';
 
-                if (is_array($item[$continues])) {
+                if (\is_array($item[$continues])) {
                     end($item[$continues]);
                     $item[$continues][key($item[$continues])] .= substr($line, 1, -1);
                 } else {
@@ -110,7 +110,7 @@ protected function loadResource($resource)
             }
         }
         // save last item
-        if (!in_array('fuzzy', $flags)) {
+        if (!\in_array('fuzzy', $flags)) {
             $this->addMessage($messages, $item);
         }
         fclose($stream);
@@ -126,7 +126,7 @@ protected function loadResource($resource)
      */
     private function addMessage(array &$messages, array $item)
     {
-        if (is_array($item['translated'])) {
+        if (\is_array($item['translated'])) {
             $messages[stripcslashes($item['ids']['singular'])] = stripcslashes($item['translated'][0]);
             if (isset($item['ids']['plural'])) {
                 $plurals = $item['translated'];
diff --git a/src/Symfony/Component/Translation/LoggingTranslator.php b/src/Symfony/Component/Translation/LoggingTranslator.php
index 93237ed3a250..1cefcb6b9919 100644
--- a/src/Symfony/Component/Translation/LoggingTranslator.php
+++ b/src/Symfony/Component/Translation/LoggingTranslator.php
@@ -32,7 +32,7 @@ class LoggingTranslator implements TranslatorInterface, TranslatorBagInterface
     public function __construct(TranslatorInterface $translator, LoggerInterface $logger)
     {
         if (!$translator instanceof TranslatorBagInterface) {
-            throw new \InvalidArgumentException(sprintf('The Translator "%s" must implement TranslatorInterface and TranslatorBagInterface.', get_class($translator)));
+            throw new \InvalidArgumentException(sprintf('The Translator "%s" must implement TranslatorInterface and TranslatorBagInterface.', \get_class($translator)));
         }
 
         $this->translator = $translator;
@@ -104,7 +104,7 @@ public function getFallbackLocales()
      */
     public function __call($method, $args)
     {
-        return call_user_func_array(array($this->translator, $method), $args);
+        return \call_user_func_array(array($this->translator, $method), $args);
     }
 
     /**
diff --git a/src/Symfony/Component/Translation/MessageSelector.php b/src/Symfony/Component/Translation/MessageSelector.php
index bdbb0f965fff..4a610d53788a 100644
--- a/src/Symfony/Component/Translation/MessageSelector.php
+++ b/src/Symfony/Component/Translation/MessageSelector.php
@@ -74,7 +74,7 @@ public function choose($message, $number, $locale)
         if (!isset($standardRules[$position])) {
             // when there's exactly one rule given, and that rule is a standard
             // rule, use this rule
-            if (1 === count($parts) && isset($standardRules[0])) {
+            if (1 === \count($parts) && isset($standardRules[0])) {
                 return $standardRules[0];
             }
 
diff --git a/src/Symfony/Component/Translation/PluralizationRules.php b/src/Symfony/Component/Translation/PluralizationRules.php
index 80de7aabdf06..152411484d16 100644
--- a/src/Symfony/Component/Translation/PluralizationRules.php
+++ b/src/Symfony/Component/Translation/PluralizationRules.php
@@ -35,14 +35,14 @@ public static function get($number, $locale)
             $locale = 'xbr';
         }
 
-        if (strlen($locale) > 3) {
-            $locale = substr($locale, 0, -strlen(strrchr($locale, '_')));
+        if (\strlen($locale) > 3) {
+            $locale = substr($locale, 0, -\strlen(strrchr($locale, '_')));
         }
 
         if (isset(self::$rules[$locale])) {
-            $return = call_user_func(self::$rules[$locale], $number);
+            $return = \call_user_func(self::$rules[$locale], $number);
 
-            if (!is_int($return) || $return < 0) {
+            if (!\is_int($return) || $return < 0) {
                 return 0;
             }
 
@@ -203,11 +203,11 @@ public static function set($rule, $locale)
             $locale = 'xbr';
         }
 
-        if (strlen($locale) > 3) {
-            $locale = substr($locale, 0, -strlen(strrchr($locale, '_')));
+        if (\strlen($locale) > 3) {
+            $locale = substr($locale, 0, -\strlen(strrchr($locale, '_')));
         }
 
-        if (!is_callable($rule)) {
+        if (!\is_callable($rule)) {
             throw new \LogicException('The given rule can not be called');
         }
 
diff --git a/src/Symfony/Component/Translation/Tests/Loader/LocalizedTestCase.php b/src/Symfony/Component/Translation/Tests/Loader/LocalizedTestCase.php
index a655c69d2e72..279e9fde5b66 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/LocalizedTestCase.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/LocalizedTestCase.php
@@ -17,7 +17,7 @@ abstract class LocalizedTestCase extends TestCase
 {
     protected function setUp()
     {
-        if (!extension_loaded('intl')) {
+        if (!\extension_loaded('intl')) {
             $this->markTestSkipped('Extension intl is required.');
         }
     }
diff --git a/src/Symfony/Component/Translation/Tests/PluralizationRulesTest.php b/src/Symfony/Component/Translation/Tests/PluralizationRulesTest.php
index a0624e297a62..5eb6c01f5d21 100644
--- a/src/Symfony/Component/Translation/Tests/PluralizationRulesTest.php
+++ b/src/Symfony/Component/Translation/Tests/PluralizationRulesTest.php
@@ -100,9 +100,9 @@ protected function validateMatrix($nplural, $matrix, $expectSuccess = true)
         foreach ($matrix as $langCode => $data) {
             $indexes = array_flip($data);
             if ($expectSuccess) {
-                $this->assertEquals($nplural, count($indexes), "Langcode '$langCode' has '$nplural' plural forms.");
+                $this->assertEquals($nplural, \count($indexes), "Langcode '$langCode' has '$nplural' plural forms.");
             } else {
-                $this->assertNotEquals((int) $nplural, count($indexes), "Langcode '$langCode' has '$nplural' plural forms.");
+                $this->assertNotEquals((int) $nplural, \count($indexes), "Langcode '$langCode' has '$nplural' plural forms.");
             }
         }
     }
diff --git a/src/Symfony/Component/Translation/Tests/TranslatorTest.php b/src/Symfony/Component/Translation/Tests/TranslatorTest.php
index 9efedb3fe006..9277d6656840 100644
--- a/src/Symfony/Component/Translation/Tests/TranslatorTest.php
+++ b/src/Symfony/Component/Translation/Tests/TranslatorTest.php
@@ -538,7 +538,7 @@ public function testLegacyGetMessages($resources, $locale, $expected)
     {
         $locales = array_keys($resources);
         $_locale = null !== $locale ? $locale : reset($locales);
-        $locales = array_slice($locales, 0, array_search($_locale, $locales));
+        $locales = \array_slice($locales, 0, array_search($_locale, $locales));
 
         $translator = new Translator($_locale, new MessageSelector());
         $translator->setFallbackLocales(array_reverse($locales));
diff --git a/src/Symfony/Component/Translation/Translator.php b/src/Symfony/Component/Translation/Translator.php
index 137348b19b05..3ab9b578a454 100644
--- a/src/Symfony/Component/Translation/Translator.php
+++ b/src/Symfony/Component/Translation/Translator.php
@@ -119,7 +119,7 @@ public function addResource($format, $resource, $locale, $domain = null)
 
         $this->resources[$locale][] = array($format, $resource, $domain);
 
-        if (in_array($locale, $this->fallbackLocales)) {
+        if (\in_array($locale, $this->fallbackLocales)) {
             $this->catalogues = array();
         } else {
             unset($this->catalogues[$locale]);
@@ -156,7 +156,7 @@ public function setFallbackLocale($locales)
     {
         @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.3 and will be removed in 3.0. Use the setFallbackLocales() method instead.', E_USER_DEPRECATED);
 
-        $this->setFallbackLocales(is_array($locales) ? $locales : array($locales));
+        $this->setFallbackLocales(\is_array($locales) ? $locales : array($locales));
     }
 
     /**
@@ -439,7 +439,7 @@ protected function computeFallbackLocales($locale)
         }
 
         if (false !== strrchr($locale, '_')) {
-            array_unshift($locales, substr($locale, 0, -strlen(strrchr($locale, '_'))));
+            array_unshift($locales, substr($locale, 0, -\strlen(strrchr($locale, '_'))));
         }
 
         return array_unique($locales);
diff --git a/src/Symfony/Component/Translation/Util/ArrayConverter.php b/src/Symfony/Component/Translation/Util/ArrayConverter.php
index 9c0a420a8592..b98e7ce826e4 100644
--- a/src/Symfony/Component/Translation/Util/ArrayConverter.php
+++ b/src/Symfony/Component/Translation/Util/ArrayConverter.php
@@ -54,7 +54,7 @@ private static function &getElementByPath(array &$tree, array $parts)
         $parentOfElem = null;
 
         foreach ($parts as $i => $part) {
-            if (isset($elem[$part]) && is_string($elem[$part])) {
+            if (isset($elem[$part]) && \is_string($elem[$part])) {
                 /* Process next case:
                  *    'foo': 'test1',
                  *    'foo.bar': 'test2'
@@ -62,14 +62,14 @@ private static function &getElementByPath(array &$tree, array $parts)
                  * $tree['foo'] was string before we found array {bar: test2}.
                  *  Treat new element as string too, e.g. add $tree['foo.bar'] = 'test2';
                  */
-                $elem = &$elem[implode('.', array_slice($parts, $i))];
+                $elem = &$elem[implode('.', \array_slice($parts, $i))];
                 break;
             }
             $parentOfElem = &$elem;
             $elem = &$elem[$part];
         }
 
-        if (is_array($elem) && count($elem) > 0 && $parentOfElem) {
+        if (\is_array($elem) && \count($elem) > 0 && $parentOfElem) {
             /* Process next case:
              *    'foo.bar': 'test1'
              *    'foo': 'test2'
@@ -89,7 +89,7 @@ private static function cancelExpand(array &$tree, $prefix, array $node)
         $prefix .= '.';
 
         foreach ($node as $id => $value) {
-            if (is_string($value)) {
+            if (\is_string($value)) {
                 $tree[$prefix.$id] = $value;
             } else {
                 self::cancelExpand($tree, $prefix.$id, $value);
diff --git a/src/Symfony/Component/Validator/Constraint.php b/src/Symfony/Component/Validator/Constraint.php
index c5890c658aea..70a11ef8c98c 100644
--- a/src/Symfony/Component/Validator/Constraint.php
+++ b/src/Symfony/Component/Validator/Constraint.php
@@ -73,7 +73,7 @@ public static function getErrorName($errorCode)
             throw new InvalidArgumentException(sprintf(
                 'The error code "%s" does not exist for constraint of type "%s".',
                 $errorCode,
-                get_called_class()
+                \get_called_class()
             ));
         }
 
@@ -116,15 +116,15 @@ public function __construct($options = null)
         // The "groups" option is added to the object lazily
         $knownOptions['groups'] = true;
 
-        if (is_array($options) && count($options) >= 1 && isset($options['value']) && !property_exists($this, 'value')) {
+        if (\is_array($options) && \count($options) >= 1 && isset($options['value']) && !property_exists($this, 'value')) {
             $options[$this->getDefaultOption()] = $options['value'];
             unset($options['value']);
         }
 
-        if (is_array($options)) {
+        if (\is_array($options)) {
             reset($options);
         }
-        if (is_array($options) && count($options) > 0 && is_string(key($options))) {
+        if (\is_array($options) && \count($options) > 0 && \is_string(key($options))) {
             foreach ($options as $option => $value) {
                 if (array_key_exists($option, $knownOptions)) {
                     $this->$option = $value;
@@ -133,12 +133,12 @@ public function __construct($options = null)
                     $invalidOptions[] = $option;
                 }
             }
-        } elseif (null !== $options && !(is_array($options) && 0 === count($options))) {
+        } elseif (null !== $options && !(\is_array($options) && 0 === \count($options))) {
             $option = $this->getDefaultOption();
 
             if (null === $option) {
                 throw new ConstraintDefinitionException(
-                    sprintf('No default option is configured for constraint %s', get_class($this))
+                    sprintf('No default option is configured for constraint %s', \get_class($this))
                 );
             }
 
@@ -150,16 +150,16 @@ public function __construct($options = null)
             }
         }
 
-        if (count($invalidOptions) > 0) {
+        if (\count($invalidOptions) > 0) {
             throw new InvalidOptionsException(
-                sprintf('The options "%s" do not exist in constraint %s', implode('", "', $invalidOptions), get_class($this)),
+                sprintf('The options "%s" do not exist in constraint %s', implode('", "', $invalidOptions), \get_class($this)),
                 $invalidOptions
             );
         }
 
-        if (count($missingOptions) > 0) {
+        if (\count($missingOptions) > 0) {
             throw new MissingOptionsException(
-                sprintf('The options "%s" must be set for constraint %s', implode('", "', array_keys($missingOptions)), get_class($this)),
+                sprintf('The options "%s" must be set for constraint %s', implode('", "', array_keys($missingOptions)), \get_class($this)),
                 array_keys($missingOptions)
             );
         }
@@ -185,7 +185,7 @@ public function __set($option, $value)
             return;
         }
 
-        throw new InvalidOptionsException(sprintf('The option "%s" does not exist in constraint %s', $option, get_class($this)), array($option));
+        throw new InvalidOptionsException(sprintf('The option "%s" does not exist in constraint %s', $option, \get_class($this)), array($option));
     }
 
     /**
@@ -211,7 +211,7 @@ public function __get($option)
             return $this->groups;
         }
 
-        throw new InvalidOptionsException(sprintf('The option "%s" does not exist in constraint %s', $option, get_class($this)), array($option));
+        throw new InvalidOptionsException(sprintf('The option "%s" does not exist in constraint %s', $option, \get_class($this)), array($option));
     }
 
     /**
@@ -231,7 +231,7 @@ public function __isset($option)
      */
     public function addImplicitGroupName($group)
     {
-        if (in_array(self::DEFAULT_GROUP, $this->groups) && !in_array($group, $this->groups)) {
+        if (\in_array(self::DEFAULT_GROUP, $this->groups) && !\in_array($group, $this->groups)) {
             $this->groups[] = $group;
         }
     }
@@ -274,7 +274,7 @@ public function getRequiredOptions()
      */
     public function validatedBy()
     {
-        return get_class($this).'Validator';
+        return \get_class($this).'Validator';
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/ConstraintValidator.php b/src/Symfony/Component/Validator/ConstraintValidator.php
index a675aa44f396..6f8c05a2c454 100644
--- a/src/Symfony/Component/Validator/ConstraintValidator.php
+++ b/src/Symfony/Component/Validator/ConstraintValidator.php
@@ -105,7 +105,7 @@ protected function buildViolationInContext(ExecutionContextInterface $context, $
      */
     protected function formatTypeOf($value)
     {
-        return is_object($value) ? get_class($value) : gettype($value);
+        return \is_object($value) ? \get_class($value) : \gettype($value);
     }
 
     /**
@@ -154,7 +154,7 @@ protected function formatValue($value, $format = 0)
             return $value->format('Y-m-d H:i:s');
         }
 
-        if (is_object($value)) {
+        if (\is_object($value)) {
             if (($format & self::OBJECT_TO_STRING) && method_exists($value, '__toString')) {
                 return $value->__toString();
             }
@@ -162,15 +162,15 @@ protected function formatValue($value, $format = 0)
             return 'object';
         }
 
-        if (is_array($value)) {
+        if (\is_array($value)) {
             return 'array';
         }
 
-        if (is_string($value)) {
+        if (\is_string($value)) {
             return '"'.$value.'"';
         }
 
-        if (is_resource($value)) {
+        if (\is_resource($value)) {
             return 'resource';
         }
 
diff --git a/src/Symfony/Component/Validator/ConstraintViolation.php b/src/Symfony/Component/Validator/ConstraintViolation.php
index 239d01a79f47..804aa2cbe106 100644
--- a/src/Symfony/Component/Validator/ConstraintViolation.php
+++ b/src/Symfony/Component/Validator/ConstraintViolation.php
@@ -70,9 +70,9 @@ public function __construct($message, $messageTemplate, array $parameters, $root
      */
     public function __toString()
     {
-        if (is_object($this->root)) {
-            $class = 'Object('.get_class($this->root).')';
-        } elseif (is_array($this->root)) {
+        if (\is_object($this->root)) {
+            $class = 'Object('.\get_class($this->root).')';
+        } elseif (\is_array($this->root)) {
             $class = 'Array';
         } else {
             $class = (string) $this->root;
diff --git a/src/Symfony/Component/Validator/ConstraintViolationList.php b/src/Symfony/Component/Validator/ConstraintViolationList.php
index 3490237bc2d6..feb173272018 100644
--- a/src/Symfony/Component/Validator/ConstraintViolationList.php
+++ b/src/Symfony/Component/Validator/ConstraintViolationList.php
@@ -120,7 +120,7 @@ public function getIterator()
      */
     public function count()
     {
-        return count($this->violations);
+        return \count($this->violations);
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/Constraints/AbstractComparison.php b/src/Symfony/Component/Validator/Constraints/AbstractComparison.php
index e20a8f3fb7b0..c2a6e685f95b 100644
--- a/src/Symfony/Component/Validator/Constraints/AbstractComparison.php
+++ b/src/Symfony/Component/Validator/Constraints/AbstractComparison.php
@@ -34,10 +34,10 @@ public function __construct($options = null)
             $options = array();
         }
 
-        if (is_array($options) && !isset($options['value'])) {
+        if (\is_array($options) && !isset($options['value'])) {
             throw new ConstraintDefinitionException(sprintf(
                 'The %s constraint requires the "value" option to be set.',
-                get_class($this)
+                \get_class($this)
             ));
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/AbstractComparisonValidator.php b/src/Symfony/Component/Validator/Constraints/AbstractComparisonValidator.php
index 87e8a5f3ff46..c82c19d5469b 100644
--- a/src/Symfony/Component/Validator/Constraints/AbstractComparisonValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/AbstractComparisonValidator.php
@@ -43,7 +43,7 @@ public function validate($value, Constraint $constraint)
         // This allows to compare with any date/time value supported by
         // the DateTime constructor:
         // http://php.net/manual/en/datetime.formats.php
-        if (is_string($comparedValue)) {
+        if (\is_string($comparedValue)) {
             if ($value instanceof \DateTimeImmutable) {
                 // If $value is immutable, convert the compared value to a
                 // DateTimeImmutable too
diff --git a/src/Symfony/Component/Validator/Constraints/AllValidator.php b/src/Symfony/Component/Validator/Constraints/AllValidator.php
index 94ff8190e47c..fa763c5f910f 100644
--- a/src/Symfony/Component/Validator/Constraints/AllValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/AllValidator.php
@@ -34,7 +34,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_array($value) && !$value instanceof \Traversable) {
+        if (!\is_array($value) && !$value instanceof \Traversable) {
             throw new UnexpectedTypeException($value, 'array or Traversable');
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/BicValidator.php b/src/Symfony/Component/Validator/Constraints/BicValidator.php
index d2188071fabf..51aecc384ae7 100644
--- a/src/Symfony/Component/Validator/Constraints/BicValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/BicValidator.php
@@ -33,7 +33,7 @@ public function validate($value, Constraint $constraint)
         $canonicalize = str_replace(' ', '', $value);
 
         // the bic must be either 8 or 11 characters long
-        if (!in_array(strlen($canonicalize), array(8, 11))) {
+        if (!\in_array(\strlen($canonicalize), array(8, 11))) {
             $this->context->buildViolation($constraint->message)
                 ->setParameter('{{ value }}', $this->formatValue($value))
                 ->setCode(Bic::INVALID_LENGTH_ERROR)
diff --git a/src/Symfony/Component/Validator/Constraints/Callback.php b/src/Symfony/Component/Validator/Constraints/Callback.php
index dc124393b6cd..592ae00ba4fc 100644
--- a/src/Symfony/Component/Validator/Constraints/Callback.php
+++ b/src/Symfony/Component/Validator/Constraints/Callback.php
@@ -39,16 +39,16 @@ class Callback extends Constraint
     public function __construct($options = null)
     {
         // Invocation through annotations with an array parameter only
-        if (is_array($options) && 1 === count($options) && isset($options['value'])) {
+        if (\is_array($options) && 1 === \count($options) && isset($options['value'])) {
             $options = $options['value'];
         }
 
-        if (is_array($options) && isset($options['methods'])) {
+        if (\is_array($options) && isset($options['methods'])) {
             @trigger_error('The "methods" option of the '.__CLASS__.' class is deprecated since Symfony 2.4 and will be removed in 3.0. Use the "callback" option instead.', E_USER_DEPRECATED);
         }
 
-        if (is_array($options) && !isset($options['callback']) && !isset($options['methods']) && !isset($options['groups']) && !isset($options['payload'])) {
-            if (is_callable($options) || !$options) {
+        if (\is_array($options) && !isset($options['callback']) && !isset($options['methods']) && !isset($options['groups']) && !isset($options['payload'])) {
+            if (\is_callable($options) || !$options) {
                 $options = array('callback' => $options);
             } else {
                 // @deprecated, to be removed in 3.0
diff --git a/src/Symfony/Component/Validator/Constraints/CallbackValidator.php b/src/Symfony/Component/Validator/Constraints/CallbackValidator.php
index df4920401197..8401f8e6ebd9 100644
--- a/src/Symfony/Component/Validator/Constraints/CallbackValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/CallbackValidator.php
@@ -41,7 +41,7 @@ public function validate($object, Constraint $constraint)
 
         // has to be an array so that we can differentiate between callables
         // and method names
-        if (null !== $constraint->methods && !is_array($constraint->methods)) {
+        if (null !== $constraint->methods && !\is_array($constraint->methods)) {
             throw new UnexpectedTypeException($constraint->methods, 'array');
         }
 
@@ -50,18 +50,18 @@ public function validate($object, Constraint $constraint)
         foreach ($methods as $method) {
             if ($method instanceof \Closure) {
                 $method($object, $this->context);
-            } elseif (is_array($method)) {
-                if (!is_callable($method)) {
-                    if (isset($method[0]) && is_object($method[0])) {
-                        $method[0] = get_class($method[0]);
+            } elseif (\is_array($method)) {
+                if (!\is_callable($method)) {
+                    if (isset($method[0]) && \is_object($method[0])) {
+                        $method[0] = \get_class($method[0]);
                     }
                     throw new ConstraintDefinitionException(sprintf('%s targeted by Callback constraint is not a valid callable', json_encode($method)));
                 }
 
-                call_user_func($method, $object, $this->context);
+                \call_user_func($method, $object, $this->context);
             } elseif (null !== $object) {
                 if (!method_exists($object, $method)) {
-                    throw new ConstraintDefinitionException(sprintf('Method "%s" targeted by Callback constraint does not exist in class %s', $method, get_class($object)));
+                    throw new ConstraintDefinitionException(sprintf('Method "%s" targeted by Callback constraint does not exist in class %s', $method, \get_class($object)));
                 }
 
                 $reflMethod = new \ReflectionMethod($object, $method);
diff --git a/src/Symfony/Component/Validator/Constraints/ChoiceValidator.php b/src/Symfony/Component/Validator/Constraints/ChoiceValidator.php
index c1b11599d024..0c26065822e1 100644
--- a/src/Symfony/Component/Validator/Constraints/ChoiceValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/ChoiceValidator.php
@@ -35,7 +35,7 @@ public function validate($value, Constraint $constraint)
             throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Choice');
         }
 
-        if (!is_array($constraint->choices) && !$constraint->callback) {
+        if (!\is_array($constraint->choices) && !$constraint->callback) {
             throw new ConstraintDefinitionException('Either "choices" or "callback" must be specified on constraint Choice');
         }
 
@@ -43,24 +43,24 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if ($constraint->multiple && !is_array($value)) {
+        if ($constraint->multiple && !\is_array($value)) {
             throw new UnexpectedTypeException($value, 'array');
         }
 
         if ($constraint->callback) {
-            if (!is_callable($choices = array($this->context->getClassName(), $constraint->callback))
-                && !is_callable($choices = $constraint->callback)
+            if (!\is_callable($choices = array($this->context->getClassName(), $constraint->callback))
+                && !\is_callable($choices = $constraint->callback)
             ) {
                 throw new ConstraintDefinitionException('The Choice constraint expects a valid callback');
             }
-            $choices = call_user_func($choices);
+            $choices = \call_user_func($choices);
         } else {
             $choices = $constraint->choices;
         }
 
         if ($constraint->multiple) {
             foreach ($value as $_value) {
-                if (!in_array($_value, $choices, $constraint->strict)) {
+                if (!\in_array($_value, $choices, $constraint->strict)) {
                     if ($this->context instanceof ExecutionContextInterface) {
                         $this->context->buildViolation($constraint->multipleMessage)
                             ->setParameter('{{ value }}', $this->formatValue($_value))
@@ -79,7 +79,7 @@ public function validate($value, Constraint $constraint)
                 }
             }
 
-            $count = count($value);
+            $count = \count($value);
 
             if (null !== $constraint->min && $count < $constraint->min) {
                 if ($this->context instanceof ExecutionContextInterface) {
@@ -116,7 +116,7 @@ public function validate($value, Constraint $constraint)
 
                 return;
             }
-        } elseif (!in_array($value, $choices, $constraint->strict)) {
+        } elseif (!\in_array($value, $choices, $constraint->strict)) {
             if ($this->context instanceof ExecutionContextInterface) {
                 $this->context->buildViolation($constraint->message)
                     ->setParameter('{{ value }}', $this->formatValue($value))
diff --git a/src/Symfony/Component/Validator/Constraints/Collection.php b/src/Symfony/Component/Validator/Constraints/Collection.php
index 9cb2063042fa..2b5679b22d07 100644
--- a/src/Symfony/Component/Validator/Constraints/Collection.php
+++ b/src/Symfony/Component/Validator/Constraints/Collection.php
@@ -41,7 +41,7 @@ class Collection extends Composite
     public function __construct($options = null)
     {
         // no known options set? $options is the fields array
-        if (is_array($options)
+        if (\is_array($options)
             && !array_intersect(array_keys($options), array('groups', 'fields', 'allowExtraFields', 'allowMissingFields', 'extraFieldsMessage', 'missingFieldsMessage'))) {
             $options = array('fields' => $options);
         }
@@ -56,14 +56,14 @@ protected function initializeNestedConstraints()
     {
         parent::initializeNestedConstraints();
 
-        if (!is_array($this->fields)) {
+        if (!\is_array($this->fields)) {
             throw new ConstraintDefinitionException(sprintf('The option "fields" is expected to be an array in constraint %s', __CLASS__));
         }
 
         foreach ($this->fields as $fieldName => $field) {
             // the XmlFileLoader and YamlFileLoader pass the field Optional
             // and Required constraint as an array with exactly one element
-            if (is_array($field) && 1 == count($field)) {
+            if (\is_array($field) && 1 == \count($field)) {
                 $this->fields[$fieldName] = $field = $field[0];
             }
 
diff --git a/src/Symfony/Component/Validator/Constraints/CollectionValidator.php b/src/Symfony/Component/Validator/Constraints/CollectionValidator.php
index 737e880968aa..c2aae3a02362 100644
--- a/src/Symfony/Component/Validator/Constraints/CollectionValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/CollectionValidator.php
@@ -34,7 +34,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_array($value) && !($value instanceof \Traversable && $value instanceof \ArrayAccess)) {
+        if (!\is_array($value) && !($value instanceof \Traversable && $value instanceof \ArrayAccess)) {
             throw new UnexpectedTypeException($value, 'array or Traversable and ArrayAccess');
         }
 
@@ -51,11 +51,11 @@ public function validate($value, Constraint $constraint)
 
         foreach ($constraint->fields as $field => $fieldConstraint) {
             // bug fix issue #2779
-            $existsInArray = is_array($value) && array_key_exists($field, $value);
+            $existsInArray = \is_array($value) && array_key_exists($field, $value);
             $existsInArrayAccess = $value instanceof \ArrayAccess && $value->offsetExists($field);
 
             if ($existsInArray || $existsInArrayAccess) {
-                if (count($fieldConstraint->constraints) > 0) {
+                if (\count($fieldConstraint->constraints) > 0) {
                     if ($context instanceof ExecutionContextInterface) {
                         $context->getValidator()
                             ->inContext($context)
diff --git a/src/Symfony/Component/Validator/Constraints/Composite.php b/src/Symfony/Component/Validator/Constraints/Composite.php
index d1391bb0724a..2f2b8d29a0e6 100644
--- a/src/Symfony/Component/Validator/Constraints/Composite.php
+++ b/src/Symfony/Component/Validator/Constraints/Composite.php
@@ -61,21 +61,21 @@ public function __construct($options = null)
         $compositeOption = $this->getCompositeOption();
         $nestedConstraints = $this->$compositeOption;
 
-        if (!is_array($nestedConstraints)) {
+        if (!\is_array($nestedConstraints)) {
             $nestedConstraints = array($nestedConstraints);
         }
 
         foreach ($nestedConstraints as $constraint) {
             if (!$constraint instanceof Constraint) {
-                if (is_object($constraint)) {
-                    $constraint = get_class($constraint);
+                if (\is_object($constraint)) {
+                    $constraint = \get_class($constraint);
                 }
 
-                throw new ConstraintDefinitionException(sprintf('The value %s is not an instance of Constraint in constraint %s', $constraint, get_class($this)));
+                throw new ConstraintDefinitionException(sprintf('The value %s is not an instance of Constraint in constraint %s', $constraint, \get_class($this)));
             }
 
             if ($constraint instanceof Valid) {
-                throw new ConstraintDefinitionException(sprintf('The constraint Valid cannot be nested inside constraint %s. You can only declare the Valid constraint directly on a field or method.', get_class($this)));
+                throw new ConstraintDefinitionException(sprintf('The constraint Valid cannot be nested inside constraint %s. You can only declare the Valid constraint directly on a field or method.', \get_class($this)));
             }
         }
 
@@ -98,13 +98,13 @@ public function __construct($options = null)
             if (property_exists($constraint, 'groups')) {
                 $excessGroups = array_diff($constraint->groups, $this->groups);
 
-                if (count($excessGroups) > 0) {
+                if (\count($excessGroups) > 0) {
                     throw new ConstraintDefinitionException(sprintf(
                         'The group(s) "%s" passed to the constraint %s '.
                         'should also be passed to its containing constraint %s',
                         implode('", "', $excessGroups),
-                        get_class($constraint),
-                        get_class($this)
+                        \get_class($constraint),
+                        \get_class($this)
                     ));
                 }
             } else {
diff --git a/src/Symfony/Component/Validator/Constraints/Count.php b/src/Symfony/Component/Validator/Constraints/Count.php
index 53870fb59731..0a54ee78db77 100644
--- a/src/Symfony/Component/Validator/Constraints/Count.php
+++ b/src/Symfony/Component/Validator/Constraints/Count.php
@@ -38,7 +38,7 @@ class Count extends Constraint
 
     public function __construct($options = null)
     {
-        if (null !== $options && !is_array($options)) {
+        if (null !== $options && !\is_array($options)) {
             $options = array(
                 'min' => $options,
                 'max' => $options,
diff --git a/src/Symfony/Component/Validator/Constraints/CountValidator.php b/src/Symfony/Component/Validator/Constraints/CountValidator.php
index cbe90e09571f..b1ca1346ae00 100644
--- a/src/Symfony/Component/Validator/Constraints/CountValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/CountValidator.php
@@ -30,11 +30,11 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_array($value) && !$value instanceof \Countable) {
+        if (!\is_array($value) && !$value instanceof \Countable) {
             throw new UnexpectedTypeException($value, 'array or \Countable');
         }
 
-        $count = count($value);
+        $count = \count($value);
 
         if (null !== $constraint->max && $count > $constraint->max) {
             if ($this->context instanceof ExecutionContextInterface) {
diff --git a/src/Symfony/Component/Validator/Constraints/CountryValidator.php b/src/Symfony/Component/Validator/Constraints/CountryValidator.php
index 138d775d8306..8e258ef374bf 100644
--- a/src/Symfony/Component/Validator/Constraints/CountryValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/CountryValidator.php
@@ -37,7 +37,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/CurrencyValidator.php b/src/Symfony/Component/Validator/Constraints/CurrencyValidator.php
index 043bafad6aa6..aff53173b3c9 100644
--- a/src/Symfony/Component/Validator/Constraints/CurrencyValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/CurrencyValidator.php
@@ -38,7 +38,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/DateTimeValidator.php b/src/Symfony/Component/Validator/Constraints/DateTimeValidator.php
index 29864b49c0ae..be7061ac7d4c 100644
--- a/src/Symfony/Component/Validator/Constraints/DateTimeValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/DateTimeValidator.php
@@ -35,7 +35,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/DateValidator.php b/src/Symfony/Component/Validator/Constraints/DateValidator.php
index e14791c16aaf..b3da02be7236 100644
--- a/src/Symfony/Component/Validator/Constraints/DateValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/DateValidator.php
@@ -52,7 +52,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/EmailValidator.php b/src/Symfony/Component/Validator/Constraints/EmailValidator.php
index 4063c83ffe2e..cd65996c56d1 100644
--- a/src/Symfony/Component/Validator/Constraints/EmailValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/EmailValidator.php
@@ -45,7 +45,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/ExpressionValidator.php b/src/Symfony/Component/Validator/Constraints/ExpressionValidator.php
index 87748b0587e5..85fc4664e5ad 100644
--- a/src/Symfony/Component/Validator/Constraints/ExpressionValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/ExpressionValidator.php
@@ -58,7 +58,7 @@ public function validate($value, Constraint $constraint)
             $root = $this->context->getRoot();
             $variables['value'] = $value;
 
-            if (is_object($root)) {
+            if (\is_object($root)) {
                 // Extract the object that the property belongs to from the object
                 // graph
                 $path = new PropertyPath($this->context->getPropertyPath());
diff --git a/src/Symfony/Component/Validator/Constraints/FileValidator.php b/src/Symfony/Component/Validator/Constraints/FileValidator.php
index 34eb0d25bf12..e6579313465d 100644
--- a/src/Symfony/Component/Validator/Constraints/FileValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/FileValidator.php
@@ -164,7 +164,7 @@ public function validate($value, Constraint $constraint)
             }
         }
 
-        if (!is_scalar($value) && !$value instanceof FileObject && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !$value instanceof FileObject && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
@@ -287,7 +287,7 @@ public function validate($value, Constraint $constraint)
 
     private static function moreDecimalsThan($double, $numberOfDecimals)
     {
-        return strlen((string) $double) > strlen(round($double, $numberOfDecimals));
+        return \strlen((string) $double) > \strlen(round($double, $numberOfDecimals));
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/Constraints/GroupSequence.php b/src/Symfony/Component/Validator/Constraints/GroupSequence.php
index c055bd455165..fb3b706a8f32 100644
--- a/src/Symfony/Component/Validator/Constraints/GroupSequence.php
+++ b/src/Symfony/Component/Validator/Constraints/GroupSequence.php
@@ -206,6 +206,6 @@ public function count()
     {
         @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.5 and will be removed in 3.0.', E_USER_DEPRECATED);
 
-        return count($this->groups);
+        return \count($this->groups);
     }
 }
diff --git a/src/Symfony/Component/Validator/Constraints/IbanValidator.php b/src/Symfony/Component/Validator/Constraints/IbanValidator.php
index 87b3ad6451d0..0e93dff81662 100644
--- a/src/Symfony/Component/Validator/Constraints/IbanValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/IbanValidator.php
@@ -149,7 +149,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
@@ -267,7 +267,7 @@ private static function toBigInt($string)
         foreach ($chars as $char) {
             // Convert uppercase characters to ordinals, starting with 10 for "A"
             if (ctype_upper($char)) {
-                $bigInt .= (ord($char) - 55);
+                $bigInt .= (\ord($char) - 55);
 
                 continue;
             }
diff --git a/src/Symfony/Component/Validator/Constraints/ImageValidator.php b/src/Symfony/Component/Validator/Constraints/ImageValidator.php
index 4ff9e00c2f9b..cf3f4f676fd7 100644
--- a/src/Symfony/Component/Validator/Constraints/ImageValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/ImageValidator.php
@@ -34,11 +34,11 @@ public function validate($value, Constraint $constraint)
             throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Image');
         }
 
-        $violations = count($this->context->getViolations());
+        $violations = \count($this->context->getViolations());
 
         parent::validate($value, $constraint);
 
-        $failed = count($this->context->getViolations()) !== $violations;
+        $failed = \count($this->context->getViolations()) !== $violations;
 
         if ($failed || null === $value || '' === $value) {
             return;
diff --git a/src/Symfony/Component/Validator/Constraints/Ip.php b/src/Symfony/Component/Validator/Constraints/Ip.php
index 36772c62aa52..f45c4cacebca 100644
--- a/src/Symfony/Component/Validator/Constraints/Ip.php
+++ b/src/Symfony/Component/Validator/Constraints/Ip.php
@@ -79,7 +79,7 @@ public function __construct($options = null)
     {
         parent::__construct($options);
 
-        if (!in_array($this->version, self::$versions)) {
+        if (!\in_array($this->version, self::$versions)) {
             throw new ConstraintDefinitionException(sprintf('The option "version" must be one of "%s"', implode('", "', self::$versions)));
         }
     }
diff --git a/src/Symfony/Component/Validator/Constraints/IpValidator.php b/src/Symfony/Component/Validator/Constraints/IpValidator.php
index eb8642b547f1..1ccfae9a98e1 100644
--- a/src/Symfony/Component/Validator/Constraints/IpValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/IpValidator.php
@@ -37,7 +37,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/IsbnValidator.php b/src/Symfony/Component/Validator/Constraints/IsbnValidator.php
index d7fcb28b4b50..9067547dd7cf 100644
--- a/src/Symfony/Component/Validator/Constraints/IsbnValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/IsbnValidator.php
@@ -40,7 +40,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
@@ -177,7 +177,7 @@ protected function validateIsbn13($isbn)
             return Isbn::INVALID_CHARACTERS_ERROR;
         }
 
-        $length = strlen($isbn);
+        $length = \strlen($isbn);
 
         if ($length < 13) {
             return Isbn::TOO_SHORT_ERROR;
diff --git a/src/Symfony/Component/Validator/Constraints/IssnValidator.php b/src/Symfony/Component/Validator/Constraints/IssnValidator.php
index 1405acfc7099..883089573be7 100644
--- a/src/Symfony/Component/Validator/Constraints/IssnValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/IssnValidator.php
@@ -39,7 +39,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
@@ -67,7 +67,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        $length = strlen($canonical);
+        $length = \strlen($canonical);
 
         if ($length < 8) {
             if ($this->context instanceof ExecutionContextInterface) {
diff --git a/src/Symfony/Component/Validator/Constraints/LanguageValidator.php b/src/Symfony/Component/Validator/Constraints/LanguageValidator.php
index 19c1ba88ecd8..5d9b0cea7cdc 100644
--- a/src/Symfony/Component/Validator/Constraints/LanguageValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/LanguageValidator.php
@@ -37,7 +37,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/Length.php b/src/Symfony/Component/Validator/Constraints/Length.php
index 0f965089b5cd..20a17fabca55 100644
--- a/src/Symfony/Component/Validator/Constraints/Length.php
+++ b/src/Symfony/Component/Validator/Constraints/Length.php
@@ -42,7 +42,7 @@ class Length extends Constraint
 
     public function __construct($options = null)
     {
-        if (null !== $options && !is_array($options)) {
+        if (null !== $options && !\is_array($options)) {
             $options = array(
                 'min' => $options,
                 'max' => $options,
diff --git a/src/Symfony/Component/Validator/Constraints/LengthValidator.php b/src/Symfony/Component/Validator/Constraints/LengthValidator.php
index 1518ecf0c64e..e5fc45e77f17 100644
--- a/src/Symfony/Component/Validator/Constraints/LengthValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/LengthValidator.php
@@ -34,7 +34,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/LocaleValidator.php b/src/Symfony/Component/Validator/Constraints/LocaleValidator.php
index 6e779df2bd62..7bdc6fefd75c 100644
--- a/src/Symfony/Component/Validator/Constraints/LocaleValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/LocaleValidator.php
@@ -37,7 +37,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
@@ -45,7 +45,7 @@ public function validate($value, Constraint $constraint)
         $locales = Intl::getLocaleBundle()->getLocaleNames();
         $aliases = Intl::getLocaleBundle()->getAliases();
 
-        if (!isset($locales[$value]) && !in_array($value, $aliases)) {
+        if (!isset($locales[$value]) && !\in_array($value, $aliases)) {
             if ($this->context instanceof ExecutionContextInterface) {
                 $this->context->buildViolation($constraint->message)
                     ->setParameter('{{ value }}', $this->formatValue($value))
diff --git a/src/Symfony/Component/Validator/Constraints/LuhnValidator.php b/src/Symfony/Component/Validator/Constraints/LuhnValidator.php
index e971ab153db5..cb74de4e4251 100644
--- a/src/Symfony/Component/Validator/Constraints/LuhnValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/LuhnValidator.php
@@ -50,7 +50,7 @@ public function validate($value, Constraint $constraint)
 
         // Work with strings only, because long numbers are represented as floats
         // internally and don't work with strlen()
-        if (!is_string($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!\is_string($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
@@ -73,7 +73,7 @@ public function validate($value, Constraint $constraint)
         }
 
         $checkSum = 0;
-        $length = strlen($value);
+        $length = \strlen($value);
 
         // Starting with the last digit and walking left, add every second
         // digit to the check sum
diff --git a/src/Symfony/Component/Validator/Constraints/RangeValidator.php b/src/Symfony/Component/Validator/Constraints/RangeValidator.php
index 05ef3b47c752..c2e024ab4ccb 100644
--- a/src/Symfony/Component/Validator/Constraints/RangeValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/RangeValidator.php
@@ -58,11 +58,11 @@ public function validate($value, Constraint $constraint)
         // the DateTime constructor:
         // http://php.net/manual/en/datetime.formats.php
         if ($value instanceof \DateTime || $value instanceof \DateTimeInterface) {
-            if (is_string($min)) {
+            if (\is_string($min)) {
                 $min = new \DateTime($min);
             }
 
-            if (is_string($max)) {
+            if (\is_string($max)) {
                 $max = new \DateTime($max);
             }
         }
diff --git a/src/Symfony/Component/Validator/Constraints/Regex.php b/src/Symfony/Component/Validator/Constraints/Regex.php
index 7a43667fef63..cb122102259c 100644
--- a/src/Symfony/Component/Validator/Constraints/Regex.php
+++ b/src/Symfony/Component/Validator/Constraints/Regex.php
@@ -70,7 +70,7 @@ public function getHtmlPattern()
         }
 
         // Quit if delimiters not at very beginning/end (e.g. when options are passed)
-        if ($this->pattern[0] !== $this->pattern[strlen($this->pattern) - 1]) {
+        if ($this->pattern[0] !== $this->pattern[\strlen($this->pattern) - 1]) {
             return;
         }
 
@@ -95,7 +95,7 @@ public function getHtmlPattern()
         $pattern = '^' === $pattern[0] ? substr($pattern, 1) : '.*'.$pattern;
 
         // Trim trailing $, otherwise append .*
-        $pattern = '$' === $pattern[strlen($pattern) - 1] ? substr($pattern, 0, -1) : $pattern.'.*';
+        $pattern = '$' === $pattern[\strlen($pattern) - 1] ? substr($pattern, 0, -1) : $pattern.'.*';
 
         return $pattern;
     }
diff --git a/src/Symfony/Component/Validator/Constraints/RegexValidator.php b/src/Symfony/Component/Validator/Constraints/RegexValidator.php
index 0aa0ed5e0778..b72401d05bb0 100644
--- a/src/Symfony/Component/Validator/Constraints/RegexValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/RegexValidator.php
@@ -37,7 +37,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/TimeValidator.php b/src/Symfony/Component/Validator/Constraints/TimeValidator.php
index b5b7b9ccd646..fddab1a1a290 100644
--- a/src/Symfony/Component/Validator/Constraints/TimeValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/TimeValidator.php
@@ -52,7 +52,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/Traverse.php b/src/Symfony/Component/Validator/Constraints/Traverse.php
index 9d8bc126d188..0b74d98d463e 100644
--- a/src/Symfony/Component/Validator/Constraints/Traverse.php
+++ b/src/Symfony/Component/Validator/Constraints/Traverse.php
@@ -25,7 +25,7 @@ class Traverse extends Constraint
 
     public function __construct($options = null)
     {
-        if (is_array($options) && array_key_exists('groups', $options)) {
+        if (\is_array($options) && array_key_exists('groups', $options)) {
             throw new ConstraintDefinitionException(sprintf(
                 'The option "groups" is not supported by the constraint %s',
                 __CLASS__
diff --git a/src/Symfony/Component/Validator/Constraints/TypeValidator.php b/src/Symfony/Component/Validator/Constraints/TypeValidator.php
index 1a2276e464e1..4a33fc0351c8 100644
--- a/src/Symfony/Component/Validator/Constraints/TypeValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/TypeValidator.php
@@ -39,9 +39,9 @@ public function validate($value, Constraint $constraint)
         $isFunction = 'is_'.$type;
         $ctypeFunction = 'ctype_'.$type;
 
-        if (function_exists($isFunction) && $isFunction($value)) {
+        if (\function_exists($isFunction) && $isFunction($value)) {
             return;
-        } elseif (function_exists($ctypeFunction) && $ctypeFunction($value)) {
+        } elseif (\function_exists($ctypeFunction) && $ctypeFunction($value)) {
             return;
         } elseif ($value instanceof $constraint->type) {
             return;
diff --git a/src/Symfony/Component/Validator/Constraints/UrlValidator.php b/src/Symfony/Component/Validator/Constraints/UrlValidator.php
index ada8db46767a..f0224f072f76 100644
--- a/src/Symfony/Component/Validator/Constraints/UrlValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/UrlValidator.php
@@ -52,7 +52,7 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
@@ -82,7 +82,7 @@ public function validate($value, Constraint $constraint)
         if ($constraint->checkDNS) {
             $host = parse_url($value, PHP_URL_HOST);
 
-            if (!is_string($host) || !checkdnsrr($host, 'ANY')) {
+            if (!\is_string($host) || !checkdnsrr($host, 'ANY')) {
                 if ($this->context instanceof ExecutionContextInterface) {
                     $this->context->buildViolation($constraint->dnsMessage)
                         ->setParameter('{{ value }}', $this->formatValue($host))
diff --git a/src/Symfony/Component/Validator/Constraints/UuidValidator.php b/src/Symfony/Component/Validator/Constraints/UuidValidator.php
index 6bbef2d05fbe..44c5a11b7809 100644
--- a/src/Symfony/Component/Validator/Constraints/UuidValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/UuidValidator.php
@@ -91,7 +91,7 @@ public function validate($value, Constraint $constraint)
             throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Uuid');
         }
 
-        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
             throw new UnexpectedTypeException($value, 'string');
         }
 
@@ -315,7 +315,7 @@ private function validateStrict($value, Uuid $constraint)
         }
 
         // Check version
-        if (!in_array($value[self::STRICT_VERSION_POSITION], $constraint->versions)) {
+        if (!\in_array($value[self::STRICT_VERSION_POSITION], $constraint->versions)) {
             if ($this->context instanceof ExecutionContextInterface) {
                 $this->context->buildViolation($constraint->message)
                     ->setParameter('{{ value }}', $this->formatValue($value))
diff --git a/src/Symfony/Component/Validator/Constraints/Valid.php b/src/Symfony/Component/Validator/Constraints/Valid.php
index 50e75dd904a5..23e4f38f4020 100644
--- a/src/Symfony/Component/Validator/Constraints/Valid.php
+++ b/src/Symfony/Component/Validator/Constraints/Valid.php
@@ -31,14 +31,14 @@ class Valid extends Constraint
 
     public function __construct($options = null)
     {
-        if (is_array($options) && array_key_exists('groups', $options)) {
+        if (\is_array($options) && array_key_exists('groups', $options)) {
             throw new ConstraintDefinitionException(sprintf(
                 'The option "groups" is not supported by the constraint %s',
                 __CLASS__
             ));
         }
 
-        if (is_array($options) && array_key_exists('deep', $options)) {
+        if (\is_array($options) && array_key_exists('deep', $options)) {
             @trigger_error('The "deep" option for the Valid constraint is deprecated since Symfony 2.5 and will be removed in 3.0. When traversing arrays, nested arrays are always traversed. When traversing nested objects, their traversal strategy is used.', E_USER_DEPRECATED);
         }
 
diff --git a/src/Symfony/Component/Validator/Context/ExecutionContext.php b/src/Symfony/Component/Validator/Context/ExecutionContext.php
index 5d04aa305006..165c5725b40f 100644
--- a/src/Symfony/Component/Validator/Context/ExecutionContext.php
+++ b/src/Symfony/Component/Validator/Context/ExecutionContext.php
@@ -186,7 +186,7 @@ public function addViolation($message, array $parameters = array(), $invalidValu
         // The parameters $invalidValue and following are ignored by the new
         // API, as they are not present in the new interface anymore.
         // You should use buildViolation() instead.
-        if (func_num_args() > 2) {
+        if (\func_num_args() > 2) {
             @trigger_error('The parameters $invalidValue, $plural and $code in method '.__METHOD__.' are deprecated since Symfony 2.5 and will be removed in 3.0. Use the '.__CLASS__.'::buildViolation method instead.', E_USER_DEPRECATED);
 
             $this
@@ -323,7 +323,7 @@ public function addViolationAt($subPath, $message, array $parameters = array(),
     {
         @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.5 and will be removed in 3.0. Use the '.__CLASS__.'::buildViolation method instead.', E_USER_DEPRECATED);
 
-        if (func_num_args() > 2) {
+        if (\func_num_args() > 2) {
             $this
                 ->buildViolation($message, $parameters)
                 ->atPath($subPath)
@@ -350,7 +350,7 @@ public function validate($value, $subPath = '', $groups = null, $traverse = fals
     {
         @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.5 and will be removed in 3.0. Use the '.__CLASS__.'::getValidator() method instead.', E_USER_DEPRECATED);
 
-        if (is_array($value)) {
+        if (\is_array($value)) {
             // The $traverse flag is ignored for arrays
             $constraint = new Valid(array('traverse' => true, 'deep' => $deep));
 
diff --git a/src/Symfony/Component/Validator/Exception/UnexpectedTypeException.php b/src/Symfony/Component/Validator/Exception/UnexpectedTypeException.php
index 49d8cc208223..485dbca051d5 100644
--- a/src/Symfony/Component/Validator/Exception/UnexpectedTypeException.php
+++ b/src/Symfony/Component/Validator/Exception/UnexpectedTypeException.php
@@ -15,6 +15,6 @@ class UnexpectedTypeException extends ValidatorException
 {
     public function __construct($value, $expectedType)
     {
-        parent::__construct(sprintf('Expected argument of type "%s", "%s" given', $expectedType, is_object($value) ? get_class($value) : gettype($value)));
+        parent::__construct(sprintf('Expected argument of type "%s", "%s" given', $expectedType, \is_object($value) ? \get_class($value) : \gettype($value)));
     }
 }
diff --git a/src/Symfony/Component/Validator/ExecutionContext.php b/src/Symfony/Component/Validator/ExecutionContext.php
index 11c354adf164..1eb322d997a9 100644
--- a/src/Symfony/Component/Validator/ExecutionContext.php
+++ b/src/Symfony/Component/Validator/ExecutionContext.php
@@ -84,7 +84,7 @@ public function addViolation($message, array $params = array(), $invalidValue =
             $this->globalContext->getRoot(),
             $this->propertyPath,
             // check using func_num_args() to allow passing null values
-            func_num_args() >= 3 ? $invalidValue : $this->value,
+            \func_num_args() >= 3 ? $invalidValue : $this->value,
             $plural,
             $code
         ));
@@ -104,7 +104,7 @@ public function addViolationAt($subPath, $message, array $parameters = array(),
             $this->globalContext->getRoot(),
             $this->getPropertyPath($subPath),
             // check using func_num_args() to allow passing null values
-            func_num_args() >= 4 ? $invalidValue : $this->value,
+            \func_num_args() >= 4 ? $invalidValue : $this->value,
             $plural,
             $code
         ));
@@ -208,7 +208,7 @@ public function validate($value, $subPath = '', $groups = null, $traverse = fals
      */
     public function validateValue($value, $constraints, $subPath = '', $groups = null)
     {
-        $constraints = is_array($constraints) ? $constraints : array($constraints);
+        $constraints = \is_array($constraints) ? $constraints : array($constraints);
 
         if (null === $groups && '' === $subPath) {
             $context = clone $this;
diff --git a/src/Symfony/Component/Validator/Mapping/Cache/ApcCache.php b/src/Symfony/Component/Validator/Mapping/Cache/ApcCache.php
index 37dc1b4bafba..0adaf047e278 100644
--- a/src/Symfony/Component/Validator/Mapping/Cache/ApcCache.php
+++ b/src/Symfony/Component/Validator/Mapping/Cache/ApcCache.php
@@ -25,7 +25,7 @@ class ApcCache implements CacheInterface
 
     public function __construct($prefix)
     {
-        if (!extension_loaded('apc')) {
+        if (!\extension_loaded('apc')) {
             throw new \RuntimeException('Unable to use ApcCache to cache validator mappings as APC is not enabled.');
         }
 
@@ -34,7 +34,7 @@ public function __construct($prefix)
 
     public function has($class)
     {
-        if (!function_exists('apc_exists')) {
+        if (!\function_exists('apc_exists')) {
             $exists = false;
 
             apc_fetch($this->prefix.$class, $exists);
diff --git a/src/Symfony/Component/Validator/Mapping/ClassMetadata.php b/src/Symfony/Component/Validator/Mapping/ClassMetadata.php
index 6472066c8382..694a102859cc 100644
--- a/src/Symfony/Component/Validator/Mapping/ClassMetadata.php
+++ b/src/Symfony/Component/Validator/Mapping/ClassMetadata.php
@@ -146,7 +146,7 @@ public function accept(ValidationVisitorInterface $visitor, $value, $group, $pro
             foreach ($groups as $group) {
                 $this->accept($visitor, $value, $group, $propertyPath, Constraint::DEFAULT_GROUP);
 
-                if (count($visitor->getViolations()) > 0) {
+                if (\count($visitor->getViolations()) > 0) {
                     break;
                 }
             }
@@ -221,17 +221,17 @@ public function getDefaultGroup()
      */
     public function addConstraint(Constraint $constraint)
     {
-        if (!in_array(Constraint::CLASS_CONSTRAINT, (array) $constraint->getTargets())) {
+        if (!\in_array(Constraint::CLASS_CONSTRAINT, (array) $constraint->getTargets())) {
             throw new ConstraintDefinitionException(sprintf(
                 'The constraint "%s" cannot be put on classes.',
-                get_class($constraint)
+                \get_class($constraint)
             ));
         }
 
         if ($constraint instanceof Valid) {
             throw new ConstraintDefinitionException(sprintf(
                 'The constraint "%s" cannot be put on classes.',
-                get_class($constraint)
+                \get_class($constraint)
             ));
         }
 
@@ -392,7 +392,7 @@ public function mergeConstraints(ClassMetadata $source)
                 $member = clone $member;
 
                 foreach ($member->getConstraints() as $constraint) {
-                    if (in_array($constraint::DEFAULT_GROUP, $constraint->groups, true)) {
+                    if (\in_array($constraint::DEFAULT_GROUP, $constraint->groups, true)) {
                         $member->constraintsByGroup[$this->getDefaultGroup()][] = $constraint;
                     }
 
@@ -503,15 +503,15 @@ public function setGroupSequence($groupSequence)
             throw new GroupDefinitionException('Defining a static group sequence is not allowed with a group sequence provider');
         }
 
-        if (is_array($groupSequence)) {
+        if (\is_array($groupSequence)) {
             $groupSequence = new GroupSequence($groupSequence);
         }
 
-        if (in_array(Constraint::DEFAULT_GROUP, $groupSequence->groups, true)) {
+        if (\in_array(Constraint::DEFAULT_GROUP, $groupSequence->groups, true)) {
             throw new GroupDefinitionException(sprintf('The group "%s" is not allowed in group sequences', Constraint::DEFAULT_GROUP));
         }
 
-        if (!in_array($this->getDefaultGroup(), $groupSequence->groups, true)) {
+        if (!\in_array($this->getDefaultGroup(), $groupSequence->groups, true)) {
             throw new GroupDefinitionException(sprintf('The group "%s" is missing in the group sequence', $this->getDefaultGroup()));
         }
 
@@ -525,7 +525,7 @@ public function setGroupSequence($groupSequence)
      */
     public function hasGroupSequence()
     {
-        return $this->groupSequence && count($this->groupSequence->groups) > 0;
+        return $this->groupSequence && \count($this->groupSequence->groups) > 0;
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/Mapping/Factory/LazyLoadingMetadataFactory.php b/src/Symfony/Component/Validator/Mapping/Factory/LazyLoadingMetadataFactory.php
index cb253f844ba7..fc1236ecf77c 100644
--- a/src/Symfony/Component/Validator/Mapping/Factory/LazyLoadingMetadataFactory.php
+++ b/src/Symfony/Component/Validator/Mapping/Factory/LazyLoadingMetadataFactory.php
@@ -80,11 +80,11 @@ public function __construct(LoaderInterface $loader = null, CacheInterface $cach
      */
     public function getMetadataFor($value)
     {
-        if (!is_object($value) && !is_string($value)) {
-            throw new NoSuchMetadataException(sprintf('Cannot create metadata for non-objects. Got: %s', gettype($value)));
+        if (!\is_object($value) && !\is_string($value)) {
+            throw new NoSuchMetadataException(sprintf('Cannot create metadata for non-objects. Got: %s', \gettype($value)));
         }
 
-        $class = ltrim(is_object($value) ? get_class($value) : $value, '\\');
+        $class = ltrim(\is_object($value) ? \get_class($value) : $value, '\\');
 
         if (isset($this->loadedClasses[$class])) {
             return $this->loadedClasses[$class];
@@ -156,11 +156,11 @@ private function mergeConstraints(ClassMetadata $metadata)
      */
     public function hasMetadataFor($value)
     {
-        if (!is_object($value) && !is_string($value)) {
+        if (!\is_object($value) && !\is_string($value)) {
             return false;
         }
 
-        $class = ltrim(is_object($value) ? get_class($value) : $value, '\\');
+        $class = ltrim(\is_object($value) ? \get_class($value) : $value, '\\');
 
         return class_exists($class) || interface_exists($class, false);
     }
diff --git a/src/Symfony/Component/Validator/Mapping/GenericMetadata.php b/src/Symfony/Component/Validator/Mapping/GenericMetadata.php
index ae69d9b66dfe..fce49d2373fc 100644
--- a/src/Symfony/Component/Validator/Mapping/GenericMetadata.php
+++ b/src/Symfony/Component/Validator/Mapping/GenericMetadata.php
@@ -130,7 +130,7 @@ public function addConstraint(Constraint $constraint)
             throw new ConstraintDefinitionException(sprintf(
                 'The constraint "%s" can only be put on classes. Please use '.
                 '"Symfony\Component\Validator\Constraints\Valid" instead.',
-                get_class($constraint)
+                \get_class($constraint)
             ));
         }
 
@@ -191,7 +191,7 @@ public function getConstraints()
      */
     public function hasConstraints()
     {
-        return count($this->constraints) > 0;
+        return \count($this->constraints) > 0;
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/Mapping/Loader/LoaderChain.php b/src/Symfony/Component/Validator/Mapping/Loader/LoaderChain.php
index ead415e977c9..2c5108fd8dcc 100644
--- a/src/Symfony/Component/Validator/Mapping/Loader/LoaderChain.php
+++ b/src/Symfony/Component/Validator/Mapping/Loader/LoaderChain.php
@@ -36,7 +36,7 @@ public function __construct(array $loaders)
     {
         foreach ($loaders as $loader) {
             if (!$loader instanceof LoaderInterface) {
-                throw new MappingException(sprintf('Class %s is expected to implement LoaderInterface', get_class($loader)));
+                throw new MappingException(sprintf('Class %s is expected to implement LoaderInterface', \get_class($loader)));
             }
         }
 
diff --git a/src/Symfony/Component/Validator/Mapping/Loader/XmlFileLoader.php b/src/Symfony/Component/Validator/Mapping/Loader/XmlFileLoader.php
index 8bcdf9f97ef9..0c6c19b7f6f5 100644
--- a/src/Symfony/Component/Validator/Mapping/Loader/XmlFileLoader.php
+++ b/src/Symfony/Component/Validator/Mapping/Loader/XmlFileLoader.php
@@ -73,17 +73,17 @@ protected function parseConstraints(\SimpleXMLElement $nodes)
         $constraints = array();
 
         foreach ($nodes as $node) {
-            if (count($node) > 0) {
-                if (count($node->value) > 0) {
+            if (\count($node) > 0) {
+                if (\count($node->value) > 0) {
                     $options = $this->parseValues($node->value);
-                } elseif (count($node->constraint) > 0) {
+                } elseif (\count($node->constraint) > 0) {
                     $options = $this->parseConstraints($node->constraint);
-                } elseif (count($node->option) > 0) {
+                } elseif (\count($node->option) > 0) {
                     $options = $this->parseOptions($node->option);
                 } else {
                     $options = array();
                 }
-            } elseif (strlen((string) $node) > 0) {
+            } elseif (\strlen((string) $node) > 0) {
                 $options = XmlUtils::phpize(trim($node));
             } else {
                 $options = null;
@@ -107,10 +107,10 @@ protected function parseValues(\SimpleXMLElement $nodes)
         $values = array();
 
         foreach ($nodes as $node) {
-            if (count($node) > 0) {
-                if (count($node->value) > 0) {
+            if (\count($node) > 0) {
+                if (\count($node->value) > 0) {
                     $value = $this->parseValues($node->value);
-                } elseif (count($node->constraint) > 0) {
+                } elseif (\count($node->constraint) > 0) {
                     $value = $this->parseConstraints($node->constraint);
                 } else {
                     $value = array();
@@ -141,17 +141,17 @@ protected function parseOptions(\SimpleXMLElement $nodes)
         $options = array();
 
         foreach ($nodes as $node) {
-            if (count($node) > 0) {
-                if (count($node->value) > 0) {
+            if (\count($node) > 0) {
+                if (\count($node->value) > 0) {
                     $value = $this->parseValues($node->value);
-                } elseif (count($node->constraint) > 0) {
+                } elseif (\count($node->constraint) > 0) {
                     $value = $this->parseConstraints($node->constraint);
                 } else {
                     $value = array();
                 }
             } else {
                 $value = XmlUtils::phpize($node);
-                if (is_string($value)) {
+                if (\is_string($value)) {
                     $value = trim($value);
                 }
             }
@@ -184,12 +184,12 @@ protected function parseFile($path)
 
     private function loadClassMetadataFromXml(ClassMetadata $metadata, \SimpleXMLElement $classDescription)
     {
-        if (count($classDescription->{'group-sequence-provider'}) > 0) {
+        if (\count($classDescription->{'group-sequence-provider'}) > 0) {
             $metadata->setGroupSequenceProvider(true);
         }
 
         foreach ($classDescription->{'group-sequence'} as $groupSequence) {
-            if (count($groupSequence->value) > 0) {
+            if (\count($groupSequence->value) > 0) {
                 $metadata->setGroupSequence($this->parseValues($groupSequence[0]->value));
             }
         }
diff --git a/src/Symfony/Component/Validator/Mapping/Loader/YamlFileLoader.php b/src/Symfony/Component/Validator/Mapping/Loader/YamlFileLoader.php
index 16212833dc16..d1ec7f037d5b 100644
--- a/src/Symfony/Component/Validator/Mapping/Loader/YamlFileLoader.php
+++ b/src/Symfony/Component/Validator/Mapping/Loader/YamlFileLoader.php
@@ -80,16 +80,16 @@ protected function parseNodes(array $nodes)
         $values = array();
 
         foreach ($nodes as $name => $childNodes) {
-            if (is_numeric($name) && is_array($childNodes) && 1 === count($childNodes)) {
+            if (is_numeric($name) && \is_array($childNodes) && 1 === \count($childNodes)) {
                 $options = current($childNodes);
 
-                if (is_array($options)) {
+                if (\is_array($options)) {
                     $options = $this->parseNodes($options);
                 }
 
                 $values[] = $this->newConstraint(key($childNodes), $options);
             } else {
-                if (is_array($childNodes)) {
+                if (\is_array($childNodes)) {
                     $childNodes = $this->parseNodes($childNodes);
                 }
 
@@ -124,7 +124,7 @@ private function parseFile($path)
         }
 
         // not an array
-        if (!is_array($classes)) {
+        if (!\is_array($classes)) {
             throw new \InvalidArgumentException(sprintf('The file "%s" must contain a YAML array.', $this->file));
         }
 
@@ -149,13 +149,13 @@ private function loadClassMetadataFromYaml(ClassMetadata $metadata, array $class
             $metadata->setGroupSequence($classDescription['group_sequence']);
         }
 
-        if (isset($classDescription['constraints']) && is_array($classDescription['constraints'])) {
+        if (isset($classDescription['constraints']) && \is_array($classDescription['constraints'])) {
             foreach ($this->parseNodes($classDescription['constraints']) as $constraint) {
                 $metadata->addConstraint($constraint);
             }
         }
 
-        if (isset($classDescription['properties']) && is_array($classDescription['properties'])) {
+        if (isset($classDescription['properties']) && \is_array($classDescription['properties'])) {
             foreach ($classDescription['properties'] as $property => $constraints) {
                 if (null !== $constraints) {
                     foreach ($this->parseNodes($constraints) as $constraint) {
@@ -165,7 +165,7 @@ private function loadClassMetadataFromYaml(ClassMetadata $metadata, array $class
             }
         }
 
-        if (isset($classDescription['getters']) && is_array($classDescription['getters'])) {
+        if (isset($classDescription['getters']) && \is_array($classDescription['getters'])) {
             foreach ($classDescription['getters'] as $getter => $constraints) {
                 if (null !== $constraints) {
                     foreach ($this->parseNodes($constraints) as $constraint) {
diff --git a/src/Symfony/Component/Validator/Mapping/MemberMetadata.php b/src/Symfony/Component/Validator/Mapping/MemberMetadata.php
index 3f9e539dbcf2..8184f3f88980 100644
--- a/src/Symfony/Component/Validator/Mapping/MemberMetadata.php
+++ b/src/Symfony/Component/Validator/Mapping/MemberMetadata.php
@@ -88,10 +88,10 @@ public function accept(ValidationVisitorInterface $visitor, $value, $group, $pro
      */
     public function addConstraint(Constraint $constraint)
     {
-        if (!in_array(Constraint::PROPERTY_CONSTRAINT, (array) $constraint->getTargets())) {
+        if (!\in_array(Constraint::PROPERTY_CONSTRAINT, (array) $constraint->getTargets())) {
             throw new ConstraintDefinitionException(sprintf(
                 'The constraint %s cannot be put on properties or getters',
-                get_class($constraint)
+                \get_class($constraint)
             ));
         }
 
@@ -230,7 +230,7 @@ public function isCollectionCascadedDeeply()
      */
     public function getReflectionMember($objectOrClassName)
     {
-        $className = is_string($objectOrClassName) ? $objectOrClassName : get_class($objectOrClassName);
+        $className = \is_string($objectOrClassName) ? $objectOrClassName : \get_class($objectOrClassName);
         if (!isset($this->reflMember[$className])) {
             $this->reflMember[$className] = $this->newReflectionMember($objectOrClassName);
         }
diff --git a/src/Symfony/Component/Validator/Mapping/PropertyMetadata.php b/src/Symfony/Component/Validator/Mapping/PropertyMetadata.php
index 7fc19dd2f702..b03a059f8435 100644
--- a/src/Symfony/Component/Validator/Mapping/PropertyMetadata.php
+++ b/src/Symfony/Component/Validator/Mapping/PropertyMetadata.php
@@ -56,7 +56,7 @@ public function getPropertyValue($object)
      */
     protected function newReflectionMember($objectOrClassName)
     {
-        $originalClass = is_string($objectOrClassName) ? $objectOrClassName : get_class($objectOrClassName);
+        $originalClass = \is_string($objectOrClassName) ? $objectOrClassName : \get_class($objectOrClassName);
 
         while (!property_exists($objectOrClassName, $this->getName())) {
             $objectOrClassName = get_parent_class($objectOrClassName);
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/AbstractComparisonValidatorTestCase.php b/src/Symfony/Component/Validator/Tests/Constraints/AbstractComparisonValidatorTestCase.php
index 2c1bb5bbcc1f..d593aac3cdb0 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/AbstractComparisonValidatorTestCase.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/AbstractComparisonValidatorTestCase.php
@@ -137,7 +137,7 @@ public function testInvalidComparisonToValue($dirtyValue, $dirtyValueAsString, $
         if ($dirtyValue instanceof \DateTime || $dirtyValue instanceof \DateTimeInterface) {
             IntlTestHelper::requireIntl($this, '57.1');
 
-            if (\PHP_VERSION_ID < 50304 && !(extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
+            if (\PHP_VERSION_ID < 50304 && !(\extension_loaded('intl') && method_exists('IntlDateFormatter', 'setTimeZone'))) {
                 $this->markTestSkipped('Intl supports formatting DateTime objects since 5.3.4');
             }
         }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/AbstractConstraintValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/AbstractConstraintValidatorTest.php
index f686d3351bec..fe505c0a7c26 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/AbstractConstraintValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/AbstractConstraintValidatorTest.php
@@ -169,8 +169,8 @@ protected function setGroup($group)
     protected function setObject($object)
     {
         $this->object = $object;
-        $this->metadata = is_object($object)
-            ? new ClassMetadata(get_class($object))
+        $this->metadata = \is_object($object)
+            ? new ClassMetadata(\get_class($object))
             : null;
 
         $this->context->setNode($this->value, $this->object, $this->metadata, $this->propertyPath);
@@ -179,8 +179,8 @@ protected function setObject($object)
     protected function setProperty($object, $property)
     {
         $this->object = $object;
-        $this->metadata = is_object($object)
-            ? new PropertyMetadata(get_class($object), $property)
+        $this->metadata = \is_object($object)
+            ? new PropertyMetadata(\get_class($object), $property)
             : null;
 
         $this->context->setNode($this->value, $this->object, $this->metadata, $this->propertyPath);
@@ -240,7 +240,7 @@ protected function expectValidateValueAt($i, $propertyPath, $value, $constraints
 
     protected function assertNoViolation()
     {
-        $this->assertSame(0, $violationsCount = count($this->context->getViolations()), sprintf('0 violation expected. Got %u.', $violationsCount));
+        $this->assertSame(0, $violationsCount = \count($this->context->getViolations()), sprintf('0 violation expected. Got %u.', $violationsCount));
     }
 
     /**
@@ -279,7 +279,7 @@ protected function assertViolations(array $expected)
 
         $violations = $this->context->getViolations();
 
-        $this->assertCount(count($expected), $violations);
+        $this->assertCount(\count($expected), $violations);
 
         $i = 0;
 
@@ -413,7 +413,7 @@ public function assertRaised()
 
         $violations = iterator_to_array($this->context->getViolations());
 
-        Assert::assertSame($expectedCount = count($expected), $violationsCount = count($violations), sprintf('%u violation(s) expected. Got %u.', $expectedCount, $violationsCount));
+        Assert::assertSame($expectedCount = \count($expected), $violationsCount = \count($violations), sprintf('%u violation(s) expected. Got %u.', $expectedCount, $violationsCount));
 
         reset($violations);
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/CardSchemeValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/CardSchemeValidatorTest.php
index e12d201be0fc..22c96447e9c9 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/CardSchemeValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/CardSchemeValidatorTest.php
@@ -64,7 +64,7 @@ public function testInvalidNumbers($scheme, $number, $code)
         $this->validator->validate($number, $constraint);
 
         $this->buildViolation('myMessage')
-            ->setParameter('{{ value }}', is_string($number) ? '"'.$number.'"' : $number)
+            ->setParameter('{{ value }}', \is_string($number) ? '"'.$number.'"' : $number)
             ->setCode($code)
             ->assertRaised();
     }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/CountValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/CountValidatorTest.php
index 6713166ce461..5c89c8531a36 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/CountValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/CountValidatorTest.php
@@ -120,7 +120,7 @@ public function testTooManyValues($value)
         $this->validator->validate($value, $constraint);
 
         $this->buildViolation('myMessage')
-            ->setParameter('{{ count }}', count($value))
+            ->setParameter('{{ count }}', \count($value))
             ->setParameter('{{ limit }}', 4)
             ->setInvalidValue($value)
             ->setPlural(4)
@@ -141,7 +141,7 @@ public function testTooFewValues($value)
         $this->validator->validate($value, $constraint);
 
         $this->buildViolation('myMessage')
-            ->setParameter('{{ count }}', count($value))
+            ->setParameter('{{ count }}', \count($value))
             ->setParameter('{{ limit }}', 4)
             ->setInvalidValue($value)
             ->setPlural(4)
@@ -163,7 +163,7 @@ public function testTooManyValuesExact($value)
         $this->validator->validate($value, $constraint);
 
         $this->buildViolation('myMessage')
-            ->setParameter('{{ count }}', count($value))
+            ->setParameter('{{ count }}', \count($value))
             ->setParameter('{{ limit }}', 4)
             ->setInvalidValue($value)
             ->setPlural(4)
@@ -185,7 +185,7 @@ public function testTooFewValuesExact($value)
         $this->validator->validate($value, $constraint);
 
         $this->buildViolation('myMessage')
-            ->setParameter('{{ count }}', count($value))
+            ->setParameter('{{ count }}', \count($value))
             ->setParameter('{{ limit }}', 4)
             ->setInvalidValue($value)
             ->setPlural(4)
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/FileValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/FileValidatorTest.php
index 686b62b0911b..8ff542f2ec35 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/FileValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/FileValidatorTest.php
@@ -45,7 +45,7 @@ protected function tearDown()
     {
         parent::tearDown();
 
-        if (is_resource($this->file)) {
+        if (\is_resource($this->file)) {
             fclose($this->file);
         }
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/IsbnValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/IsbnValidatorTest.php
index e73b89d60bab..314739f4d0bf 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/IsbnValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/IsbnValidatorTest.php
@@ -65,7 +65,7 @@ public function getInvalidIsbn10()
             array('1A34567890', Isbn::INVALID_CHARACTERS_ERROR),
             // chr(1) evaluates to 0
             // 2070546810 is valid
-            array('2'.chr(1).'70546810', Isbn::INVALID_CHARACTERS_ERROR),
+            array('2'.\chr(1).'70546810', Isbn::INVALID_CHARACTERS_ERROR),
         );
     }
 
@@ -103,7 +103,7 @@ public function getInvalidIsbn13()
             array('978-272C442282', Isbn::INVALID_CHARACTERS_ERROR),
             // chr(1) evaluates to 0
             // 978-2070546817 is valid
-            array('978-2'.chr(1).'70546817', Isbn::INVALID_CHARACTERS_ERROR),
+            array('978-2'.\chr(1).'70546817', Isbn::INVALID_CHARACTERS_ERROR),
         );
     }
 
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/Countable.php b/src/Symfony/Component/Validator/Tests/Fixtures/Countable.php
index 282d78d45a67..afc42376a254 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/Countable.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/Countable.php
@@ -22,6 +22,6 @@ public function __construct(array $content)
 
     public function count()
     {
-        return count($this->content);
+        return \count($this->content);
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/CustomArrayObject.php b/src/Symfony/Component/Validator/Tests/Fixtures/CustomArrayObject.php
index 41eac961acf9..feb25318eb5e 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/CustomArrayObject.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/CustomArrayObject.php
@@ -55,7 +55,7 @@ public function getIterator()
 
     public function count()
     {
-        return count($this->array);
+        return \count($this->array);
     }
 
     public function serialize()
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/FakeMetadataFactory.php b/src/Symfony/Component/Validator/Tests/Fixtures/FakeMetadataFactory.php
index e3f0d9a00780..dbc255f36eb4 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/FakeMetadataFactory.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/FakeMetadataFactory.php
@@ -23,13 +23,13 @@ public function getMetadataFor($class)
     {
         $hash = null;
 
-        if (is_object($class)) {
+        if (\is_object($class)) {
             $hash = spl_object_hash($class);
-            $class = get_class($class);
+            $class = \get_class($class);
         }
 
-        if (!is_string($class)) {
-            throw new NoSuchMetadataException(sprintf('No metadata for type %s', gettype($class)));
+        if (!\is_string($class)) {
+            throw new NoSuchMetadataException(sprintf('No metadata for type %s', \gettype($class)));
         }
 
         if (!isset($this->metadatas[$class])) {
@@ -47,12 +47,12 @@ public function hasMetadataFor($class)
     {
         $hash = null;
 
-        if (is_object($class)) {
+        if (\is_object($class)) {
             $hash = spl_object_hash($class);
-            $class = get_class($class);
+            $class = \get_class($class);
         }
 
-        if (!is_string($class)) {
+        if (!\is_string($class)) {
             return false;
         }
 
@@ -66,7 +66,7 @@ public function addMetadata($metadata)
 
     public function addMetadataForValue($value, MetadataInterface $metadata)
     {
-        $key = is_object($value) ? spl_object_hash($value) : $value;
+        $key = \is_object($value) ? spl_object_hash($value) : $value;
         $this->metadatas[$key] = $metadata;
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php
index d2b8a9901172..64b3f78934f1 100644
--- a/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php
@@ -33,15 +33,15 @@ public function provideTranslationFiles()
     {
         return array_map(
             function ($filePath) { return (array) $filePath; },
-            glob(dirname(dirname(__DIR__)).'/Resources/translations/*.xlf')
+            glob(\dirname(\dirname(__DIR__)).'/Resources/translations/*.xlf')
         );
     }
 
     public function testNorwegianAlias()
     {
         $this->assertFileEquals(
-            dirname(dirname(__DIR__)).'/Resources/translations/validators.nb.xlf',
-            dirname(dirname(__DIR__)).'/Resources/translations/validators.no.xlf',
+            \dirname(\dirname(__DIR__)).'/Resources/translations/validators.nb.xlf',
+            \dirname(\dirname(__DIR__)).'/Resources/translations/validators.no.xlf',
             'The NO locale should be an alias for the NB variant of the Norwegian language.'
         );
     }
diff --git a/src/Symfony/Component/Validator/Tests/Validator/Abstract2Dot5ApiTest.php b/src/Symfony/Component/Validator/Tests/Validator/Abstract2Dot5ApiTest.php
index c6f41c647b31..0394431a4eae 100644
--- a/src/Symfony/Component/Validator/Tests/Validator/Abstract2Dot5ApiTest.php
+++ b/src/Symfony/Component/Validator/Tests/Validator/Abstract2Dot5ApiTest.php
@@ -551,7 +551,7 @@ public function testMetadataMustImplementClassMetadataInterface()
         $metadata = $this->getMockBuilder('Symfony\Component\Validator\Tests\Fixtures\LegacyClassMetadata')->getMock();
         $metadata->expects($this->any())
             ->method('getClassName')
-            ->will($this->returnValue(get_class($entity)));
+            ->will($this->returnValue(\get_class($entity)));
 
         $this->metadataFactory->addMetadata($metadata);
 
@@ -570,7 +570,7 @@ public function testReferenceMetadataMustImplementClassMetadataInterface()
         $metadata = $this->getMockBuilder('Symfony\Component\Validator\Tests\Fixtures\LegacyClassMetadata')->getMock();
         $metadata->expects($this->any())
             ->method('getClassName')
-            ->will($this->returnValue(get_class($entity->reference)));
+            ->will($this->returnValue(\get_class($entity->reference)));
 
         $this->metadataFactory->addMetadata($metadata);
 
@@ -589,7 +589,7 @@ public function testLegacyPropertyMetadataMustImplementPropertyMetadataInterface
 
         // Legacy interface
         $propertyMetadata = $this->getMockBuilder('Symfony\Component\Validator\MetadataInterface')->getMock();
-        $metadata = new FakeClassMetadata(get_class($entity));
+        $metadata = new FakeClassMetadata(\get_class($entity));
         $metadata->addCustomPropertyMetadata('firstName', $propertyMetadata);
 
         $this->metadataFactory->addMetadata($metadata);
diff --git a/src/Symfony/Component/Validator/Tests/Validator/AbstractValidatorTest.php b/src/Symfony/Component/Validator/Tests/Validator/AbstractValidatorTest.php
index 1d8813d97a3d..8dd9adc87e13 100644
--- a/src/Symfony/Component/Validator/Tests/Validator/AbstractValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Validator/AbstractValidatorTest.php
@@ -1222,7 +1222,7 @@ public function testReplaceDefaultGroupWithObjectFromGroupSequenceProvider()
             $context->addViolation('Violation in Group 3');
         };
 
-        $metadata = new ClassMetadata(get_class($entity));
+        $metadata = new ClassMetadata(\get_class($entity));
         $metadata->addConstraint(new Callback(array(
             'callback' => function () {},
             'groups' => 'Group 1',
@@ -1258,7 +1258,7 @@ public function testReplaceDefaultGroupWithArrayFromGroupSequenceProvider()
             $context->addViolation('Violation in Group 3');
         };
 
-        $metadata = new ClassMetadata(get_class($entity));
+        $metadata = new ClassMetadata(\get_class($entity));
         $metadata->addConstraint(new Callback(array(
             'callback' => function () {},
             'groups' => 'Group 1',
diff --git a/src/Symfony/Component/Validator/ValidationVisitor.php b/src/Symfony/Component/Validator/ValidationVisitor.php
index b64830121f8f..14fd88b5c684 100644
--- a/src/Symfony/Component/Validator/ValidationVisitor.php
+++ b/src/Symfony/Component/Validator/ValidationVisitor.php
@@ -92,7 +92,7 @@ public function validate($value, $group, $propertyPath, $traverse = false, $deep
             return;
         }
 
-        if (is_object($value)) {
+        if (\is_object($value)) {
             $hash = spl_object_hash($value);
 
             // Exit, if the object is already validated for the current group
@@ -118,10 +118,10 @@ public function validate($value, $group, $propertyPath, $traverse = false, $deep
         // Validate arrays recursively by default, otherwise every driver needs
         // to implement special handling for arrays.
         // https://github.com/symfony/symfony/issues/6246
-        if (is_array($value) || ($traverse && $value instanceof \Traversable)) {
+        if (\is_array($value) || ($traverse && $value instanceof \Traversable)) {
             foreach ($value as $key => $element) {
                 // Ignore any scalar values in the collection
-                if (is_object($element) || is_array($element)) {
+                if (\is_object($element) || \is_array($element)) {
                     // Only repeat the traversal if $deep is set
                     $this->validate($element, $group, $propertyPath.'['.$key.']', $deep, $deep);
                 }
diff --git a/src/Symfony/Component/Validator/Validator.php b/src/Symfony/Component/Validator/Validator.php
index 50d41d4ab697..67d5cc32cc68 100644
--- a/src/Symfony/Component/Validator/Validator.php
+++ b/src/Symfony/Component/Validator/Validator.php
@@ -99,7 +99,7 @@ public function validateProperty($containingValue, $property, $groups = null)
         if (!$metadata instanceof PropertyMetadataContainerInterface) {
             $valueAsString = is_scalar($containingValue)
                 ? '"'.$containingValue.'"'
-                : 'the value of type '.gettype($containingValue);
+                : 'the value of type '.\gettype($containingValue);
 
             throw new ValidatorException(sprintf('The metadata for %s does not support properties.', $valueAsString));
         }
@@ -124,20 +124,20 @@ public function validateProperty($containingValue, $property, $groups = null)
      */
     public function validatePropertyValue($containingValue, $property, $value, $groups = null)
     {
-        $visitor = $this->createVisitor(is_object($containingValue) ? $containingValue : $value);
+        $visitor = $this->createVisitor(\is_object($containingValue) ? $containingValue : $value);
         $metadata = $this->metadataFactory->getMetadataFor($containingValue);
 
         if (!$metadata instanceof PropertyMetadataContainerInterface) {
             $valueAsString = is_scalar($containingValue)
                 ? '"'.$containingValue.'"'
-                : 'the value of type '.gettype($containingValue);
+                : 'the value of type '.\gettype($containingValue);
 
             throw new ValidatorException(sprintf('The metadata for %s does not support properties.', $valueAsString));
         }
 
         // If $containingValue is passed as class name, take $value as root
         // and start the traversal with an empty property path
-        $propertyPath = is_object($containingValue) ? $property : '';
+        $propertyPath = \is_object($containingValue) ? $property : '';
 
         foreach ($this->resolveGroups($groups) as $group) {
             if (!$metadata->hasPropertyMetadata($property)) {
@@ -159,7 +159,7 @@ public function validateValue($value, $constraints, $groups = null)
     {
         $context = new ExecutionContext($this->createVisitor($value), $this->translator, $this->translationDomain);
 
-        $constraints = is_array($constraints) ? $constraints : array($constraints);
+        $constraints = \is_array($constraints) ? $constraints : array($constraints);
 
         foreach ($constraints as $constraint) {
             if ($constraint instanceof Valid) {
@@ -178,7 +178,7 @@ public function validateValue($value, $constraints, $groups = null)
                 throw new ValidatorException(
                     sprintf(
                         'The constraint %s cannot be validated. Use the method validate() instead.',
-                        get_class($constraint)
+                        \get_class($constraint)
                     )
                 );
             }
diff --git a/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php b/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php
index 12a38e26ec19..3e46cd2f000a 100644
--- a/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php
+++ b/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php
@@ -99,7 +99,7 @@ public function validate($value, $constraints = null, $groups = null)
         if (null !== $constraints) {
             // You can pass a single constraint or an array of constraints
             // Make sure to deal with an array in the rest of the code
-            if (!is_array($constraints)) {
+            if (!\is_array($constraints)) {
                 $constraints = array($constraints);
             }
 
@@ -109,7 +109,7 @@ public function validate($value, $constraints = null, $groups = null)
             $this->validateGenericNode(
                 $value,
                 $previousObject,
-                is_object($value) ? spl_object_hash($value) : null,
+                \is_object($value) ? spl_object_hash($value) : null,
                 $metadata,
                 $this->defaultPropertyPath,
                 $groups,
@@ -130,7 +130,7 @@ public function validate($value, $constraints = null, $groups = null)
 
         // If an object is passed without explicit constraints, validate that
         // object against the constraints defined for the object's class
-        if (is_object($value)) {
+        if (\is_object($value)) {
             $this->validateObject(
                 $value,
                 $this->defaultPropertyPath,
@@ -147,7 +147,7 @@ public function validate($value, $constraints = null, $groups = null)
 
         // If an array is passed without explicit constraints, validate each
         // object in the array
-        if (is_array($value)) {
+        if (\is_array($value)) {
             $this->validateEachObjectIn(
                 $value,
                 $this->defaultPropertyPath,
@@ -165,7 +165,7 @@ public function validate($value, $constraints = null, $groups = null)
         throw new RuntimeException(sprintf(
             'Cannot validate values of type "%s" automatically. Please '.
             'provide a constraint.',
-            gettype($value)
+            \gettype($value)
         ));
     }
 
@@ -183,7 +183,7 @@ public function validateProperty($object, $propertyName, $groups = null)
                 'The metadata factory should return instances of '.
                 '"\Symfony\Component\Validator\Mapping\ClassMetadataInterface", '.
                 'got: "%s".',
-                is_object($classMetadata) ? get_class($classMetadata) : gettype($classMetadata)
+                \is_object($classMetadata) ? \get_class($classMetadata) : \gettype($classMetadata)
             ));
         }
 
@@ -234,14 +234,14 @@ public function validatePropertyValue($objectOrClass, $propertyName, $value, $gr
                 'The metadata factory should return instances of '.
                 '"\Symfony\Component\Validator\Mapping\ClassMetadataInterface", '.
                 'got: "%s".',
-                is_object($classMetadata) ? get_class($classMetadata) : gettype($classMetadata)
+                \is_object($classMetadata) ? \get_class($classMetadata) : \gettype($classMetadata)
             ));
         }
 
         $propertyMetadatas = $classMetadata->getPropertyMetadata($propertyName);
         $groups = $groups ? $this->normalizeGroups($groups) : $this->defaultGroups;
 
-        if (is_object($objectOrClass)) {
+        if (\is_object($objectOrClass)) {
             $object = $objectOrClass;
             $cacheKey = spl_object_hash($objectOrClass);
             $propertyPath = PropertyPath::append($this->defaultPropertyPath, $propertyName);
@@ -295,7 +295,7 @@ public function getViolations()
      */
     protected function normalizeGroups($groups)
     {
-        if (is_array($groups)) {
+        if (\is_array($groups)) {
             return $groups;
         }
 
@@ -335,7 +335,7 @@ private function validateObject($object, $propertyPath, array $groups, $traversa
                     'The metadata factory should return instances of '.
                     '"Symfony\Component\Validator\Mapping\ClassMetadataInterface", '.
                     'got: "%s".',
-                    is_object($classMetadata) ? get_class($classMetadata) : gettype($classMetadata)
+                    \is_object($classMetadata) ? \get_class($classMetadata) : \gettype($classMetadata)
                 ));
             }
 
@@ -399,7 +399,7 @@ private function validateEachObjectIn($collection, $propertyPath, array $groups,
         }
 
         foreach ($collection as $key => $value) {
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 // Arrays are always cascaded, independent of the specified
                 // traversal strategy
                 // (BC with Symfony < 2.5)
@@ -416,7 +416,7 @@ private function validateEachObjectIn($collection, $propertyPath, array $groups,
 
             // Scalar and null values in the collection are ignored
             // (BC with Symfony < 2.5)
-            if (is_object($value)) {
+            if (\is_object($value)) {
                 $this->validateObject(
                     $value,
                     $propertyPath.'['.$key.']',
@@ -496,7 +496,7 @@ private function validateClassNode($object, $cacheKey, ClassMetadataInterface $m
             $defaultOverridden = false;
 
             // Use the object hash for group sequences
-            $groupHash = is_object($group) ? spl_object_hash($group) : $group;
+            $groupHash = \is_object($group) ? spl_object_hash($group) : $group;
 
             if ($context->isGroupValidated($cacheKey, $groupHash)) {
                 // Skip this group when validating the properties and when
@@ -561,7 +561,7 @@ private function validateClassNode($object, $cacheKey, ClassMetadataInterface $m
 
         // If no more groups should be validated for the property nodes,
         // we can safely quit
-        if (0 === count($groups)) {
+        if (0 === \count($groups)) {
             return;
         }
 
@@ -576,7 +576,7 @@ private function validateClassNode($object, $cacheKey, ClassMetadataInterface $m
                         'The property metadata instances should implement '.
                         '"Symfony\Component\Validator\Mapping\PropertyMetadataInterface", '.
                         'got: "%s".',
-                        is_object($propertyMetadata) ? get_class($propertyMetadata) : gettype($propertyMetadata)
+                        \is_object($propertyMetadata) ? \get_class($propertyMetadata) : \gettype($propertyMetadata)
                     ));
                 }
 
@@ -621,7 +621,7 @@ private function validateClassNode($object, $cacheKey, ClassMetadataInterface $m
             throw new ConstraintDefinitionException(sprintf(
                 'Traversal was enabled for "%s", but this class '.
                 'does not implement "\Traversable".',
-                get_class($object)
+                \get_class($object)
             ));
         }
 
@@ -697,7 +697,7 @@ private function validateGenericNode($value, $object, $cacheKey, MetadataInterfa
             $this->validateInGroup($value, $cacheKey, $metadata, $group, $context);
         }
 
-        if (0 === count($groups)) {
+        if (0 === \count($groups)) {
             return;
         }
 
@@ -708,7 +708,7 @@ private function validateGenericNode($value, $object, $cacheKey, MetadataInterfa
         $cascadingStrategy = $metadata->getCascadingStrategy();
 
         // Quit unless we have an array or a cascaded object
-        if (!is_array($value) && !($cascadingStrategy & CascadingStrategy::CASCADE)) {
+        if (!\is_array($value) && !($cascadingStrategy & CascadingStrategy::CASCADE)) {
             return;
         }
 
@@ -723,9 +723,9 @@ private function validateGenericNode($value, $object, $cacheKey, MetadataInterfa
         // The $cascadedGroups property is set, if the "Default" group is
         // overridden by a group sequence
         // See validateClassNode()
-        $cascadedGroups = null !== $cascadedGroups && count($cascadedGroups) > 0 ? $cascadedGroups : $groups;
+        $cascadedGroups = null !== $cascadedGroups && \count($cascadedGroups) > 0 ? $cascadedGroups : $groups;
 
-        if (is_array($value)) {
+        if (\is_array($value)) {
             // Arrays are always traversed, independent of the specified
             // traversal strategy
             // (BC with Symfony < 2.5)
@@ -784,7 +784,7 @@ private function validateGenericNode($value, $object, $cacheKey, MetadataInterfa
      */
     private function stepThroughGroupSequence($value, $object, $cacheKey, MetadataInterface $metadata = null, $propertyPath, $traversalStrategy, GroupSequence $groupSequence, $cascadedGroup, ExecutionContextInterface $context)
     {
-        $violationCount = count($context->getViolations());
+        $violationCount = \count($context->getViolations());
         $cascadedGroups = $cascadedGroup ? array($cascadedGroup) : null;
 
         foreach ($groupSequence->groups as $groupInSequence) {
@@ -816,7 +816,7 @@ private function stepThroughGroupSequence($value, $object, $cacheKey, MetadataIn
             }
 
             // Abort sequence validation if a violation was generated
-            if (count($context->getViolations()) > $violationCount) {
+            if (\count($context->getViolations()) > $violationCount) {
                 break;
             }
         }
diff --git a/src/Symfony/Component/Validator/Validator/RecursiveValidator.php b/src/Symfony/Component/Validator/Validator/RecursiveValidator.php
index 7ab9527a3a9d..bf0050d6f24a 100644
--- a/src/Symfony/Component/Validator/Validator/RecursiveValidator.php
+++ b/src/Symfony/Component/Validator/Validator/RecursiveValidator.php
@@ -100,7 +100,7 @@ public function hasMetadataFor($object)
      */
     public function validate($value, $groups = null, $traverse = false, $deep = false)
     {
-        $numArgs = func_num_args();
+        $numArgs = \func_num_args();
 
         // Use new signature if constraints are given in the second argument
         if (self::testConstraints($groups) && ($numArgs < 3 || 3 === $numArgs && self::testGroups($traverse))) {
@@ -134,7 +134,7 @@ public function validateProperty($object, $propertyName, $groups = null)
     public function validatePropertyValue($objectOrClass, $propertyName, $value, $groups = null)
     {
         // If a class name is passed, take $value as root
-        return $this->startContext(is_object($objectOrClass) ? $objectOrClass : $value)
+        return $this->startContext(\is_object($objectOrClass) ? $objectOrClass : $value)
             ->validatePropertyValue($objectOrClass, $propertyName, $value, $groups)
             ->getViolations();
     }
@@ -161,11 +161,11 @@ public function getMetadataFactory()
 
     private static function testConstraints($constraints)
     {
-        return null === $constraints || $constraints instanceof Constraint || (is_array($constraints) && (0 === count($constraints) || current($constraints) instanceof Constraint));
+        return null === $constraints || $constraints instanceof Constraint || (\is_array($constraints) && (0 === \count($constraints) || current($constraints) instanceof Constraint));
     }
 
     private static function testGroups($groups)
     {
-        return null === $groups || is_string($groups) || $groups instanceof GroupSequence || (is_array($groups) && (0 === count($groups) || is_string(current($groups)) || current($groups) instanceof GroupSequence));
+        return null === $groups || \is_string($groups) || $groups instanceof GroupSequence || (\is_array($groups) && (0 === \count($groups) || \is_string(current($groups)) || current($groups) instanceof GroupSequence));
     }
 }
diff --git a/src/Symfony/Component/Validator/ValidatorBuilder.php b/src/Symfony/Component/Validator/ValidatorBuilder.php
index eaf9acc1af0a..98ecddc7aee9 100644
--- a/src/Symfony/Component/Validator/ValidatorBuilder.php
+++ b/src/Symfony/Component/Validator/ValidatorBuilder.php
@@ -220,7 +220,7 @@ public function disableAnnotationMapping()
      */
     public function setMetadataFactory(MetadataFactoryInterface $metadataFactory)
     {
-        if (count($this->xmlMappings) > 0 || count($this->yamlMappings) > 0 || count($this->methodMappings) > 0 || null !== $this->annotationReader) {
+        if (\count($this->xmlMappings) > 0 || \count($this->yamlMappings) > 0 || \count($this->methodMappings) > 0 || null !== $this->annotationReader) {
             throw new ValidatorException('You cannot set a custom metadata factory after adding custom mappings. You should do either of both.');
         }
 
@@ -305,7 +305,7 @@ public function setApiVersion($apiVersion)
     {
         @trigger_error('The '.__METHOD__.' method is deprecated in version 2.7 and will be removed in version 3.0.', E_USER_DEPRECATED);
 
-        if (!in_array($apiVersion, array(Validation::API_VERSION_2_4, Validation::API_VERSION_2_5, Validation::API_VERSION_2_5_BC))) {
+        if (!\in_array($apiVersion, array(Validation::API_VERSION_2_4, Validation::API_VERSION_2_5, Validation::API_VERSION_2_5_BC))) {
             throw new InvalidArgumentException(sprintf('The requested API version is invalid: "%s"', $apiVersion));
         }
 
@@ -322,15 +322,15 @@ public function getValidator()
         if (!$metadataFactory) {
             $loaders = array();
 
-            if (count($this->xmlMappings) > 1) {
+            if (\count($this->xmlMappings) > 1) {
                 $loaders[] = new XmlFilesLoader($this->xmlMappings);
-            } elseif (1 === count($this->xmlMappings)) {
+            } elseif (1 === \count($this->xmlMappings)) {
                 $loaders[] = new XmlFileLoader($this->xmlMappings[0]);
             }
 
-            if (count($this->yamlMappings) > 1) {
+            if (\count($this->yamlMappings) > 1) {
                 $loaders[] = new YamlFilesLoader($this->yamlMappings);
-            } elseif (1 === count($this->yamlMappings)) {
+            } elseif (1 === \count($this->yamlMappings)) {
                 $loaders[] = new YamlFileLoader($this->yamlMappings[0]);
             }
 
@@ -344,9 +344,9 @@ public function getValidator()
 
             $loader = null;
 
-            if (count($loaders) > 1) {
+            if (\count($loaders) > 1) {
                 $loader = new LoaderChain($loaders);
-            } elseif (1 === count($loaders)) {
+            } elseif (1 === \count($loaders)) {
                 $loader = $loaders[0];
             }
 
diff --git a/src/Symfony/Component/VarDumper/Caster/Caster.php b/src/Symfony/Component/VarDumper/Caster/Caster.php
index 4123870043ab..63862187ef3d 100644
--- a/src/Symfony/Component/VarDumper/Caster/Caster.php
+++ b/src/Symfony/Component/VarDumper/Caster/Caster.php
@@ -89,10 +89,10 @@ public static function filter(array $a, $filter, array $listedProperties = array
             if (empty($v)) {
                 $type |= self::EXCLUDE_EMPTY & $filter;
             }
-            if ((self::EXCLUDE_NOT_IMPORTANT & $filter) && !in_array($k, $listedProperties, true)) {
+            if ((self::EXCLUDE_NOT_IMPORTANT & $filter) && !\in_array($k, $listedProperties, true)) {
                 $type |= self::EXCLUDE_NOT_IMPORTANT;
             }
-            if ((self::EXCLUDE_VERBOSE & $filter) && in_array($k, $listedProperties, true)) {
+            if ((self::EXCLUDE_VERBOSE & $filter) && \in_array($k, $listedProperties, true)) {
                 $type |= self::EXCLUDE_VERBOSE;
             }
 
diff --git a/src/Symfony/Component/VarDumper/Caster/CutArrayStub.php b/src/Symfony/Component/VarDumper/Caster/CutArrayStub.php
index f2a803053a6c..0e4fb363d2d4 100644
--- a/src/Symfony/Component/VarDumper/Caster/CutArrayStub.php
+++ b/src/Symfony/Component/VarDumper/Caster/CutArrayStub.php
@@ -25,6 +25,6 @@ public function __construct(array $value, array $preservedKeys)
         parent::__construct($value);
 
         $this->preservedSubset = array_intersect_key($value, array_flip($preservedKeys));
-        $this->cut -= count($this->preservedSubset);
+        $this->cut -= \count($this->preservedSubset);
     }
 }
diff --git a/src/Symfony/Component/VarDumper/Caster/CutStub.php b/src/Symfony/Component/VarDumper/Caster/CutStub.php
index 61140eb361d9..690338f542d9 100644
--- a/src/Symfony/Component/VarDumper/Caster/CutStub.php
+++ b/src/Symfony/Component/VarDumper/Caster/CutStub.php
@@ -24,17 +24,17 @@ public function __construct($value)
     {
         $this->value = $value;
 
-        switch (gettype($value)) {
+        switch (\gettype($value)) {
             case 'object':
                 $this->type = self::TYPE_OBJECT;
-                $this->class = get_class($value);
+                $this->class = \get_class($value);
                 $this->cut = -1;
                 break;
 
             case 'array':
                 $this->type = self::TYPE_ARRAY;
                 $this->class = self::ARRAY_ASSOC;
-                $this->cut = $this->value = count($value);
+                $this->cut = $this->value = \count($value);
                 break;
 
             case 'resource':
@@ -51,7 +51,7 @@ public function __construct($value)
             case 'string':
                 $this->type = self::TYPE_STRING;
                 $this->class = preg_match('//u', $value) ? self::STRING_UTF8 : self::STRING_BINARY;
-                $this->cut = self::STRING_BINARY === $this->class ? strlen($value) : mb_strlen($value, 'UTF-8');
+                $this->cut = self::STRING_BINARY === $this->class ? \strlen($value) : mb_strlen($value, 'UTF-8');
                 $this->value = '';
                 break;
         }
diff --git a/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php b/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php
index c39efafb5876..c4e42eb16641 100644
--- a/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php
@@ -68,11 +68,11 @@ public static function castThrowingCasterException(ThrowingCasterException $e, a
         if (isset($a[$xPrefix.'previous'], $a[$xPrefix.'trace']) && $a[$xPrefix.'previous'] instanceof \Exception) {
             $b = (array) $a[$xPrefix.'previous'];
             array_unshift($b[$xPrefix.'trace'], array(
-                'function' => 'new '.get_class($a[$xPrefix.'previous']),
+                'function' => 'new '.\get_class($a[$xPrefix.'previous']),
                 'file' => $b[$prefix.'file'],
                 'line' => $b[$prefix.'line'],
             ));
-            $a[$xPrefix.'trace'] = new TraceStub($b[$xPrefix.'trace'], false, 0, -1 - count($a[$xPrefix.'trace']->value));
+            $a[$xPrefix.'trace'] = new TraceStub($b[$xPrefix.'trace'], false, 0, -1 - \count($a[$xPrefix.'trace']->value));
         }
 
         unset($a[$xPrefix.'previous'], $a[$prefix.'code'], $a[$prefix.'file'], $a[$prefix.'line']);
@@ -90,7 +90,7 @@ public static function castTraceStub(TraceStub $trace, array $a, Stub $stub, $is
         $frames = $trace->value;
 
         $a = array();
-        $j = count($frames);
+        $j = \count($frames);
         if (0 > $i = $trace->sliceOffset) {
             $i = max(0, $j + $i);
         }
@@ -126,7 +126,7 @@ public static function castTraceStub(TraceStub $trace, array $a, Stub $stub, $is
             true
         );
         if (null !== $trace->sliceLength) {
-            $a = array_slice($a, 0, $trace->sliceLength, true);
+            $a = \array_slice($a, 0, $trace->sliceLength, true);
         }
 
         return $a;
@@ -142,14 +142,14 @@ public static function castFrameStub(FrameStub $frame, array $a, Stub $stub, $is
 
         if (isset($f['file'], $f['line'])) {
             if (preg_match('/\((\d+)\)(?:\([\da-f]{32}\))? : (?:eval\(\)\'d code|runtime-created function)$/', $f['file'], $match)) {
-                $f['file'] = substr($f['file'], 0, -strlen($match[0]));
+                $f['file'] = substr($f['file'], 0, -\strlen($match[0]));
                 $f['line'] = (int) $match[1];
             }
             if (file_exists($f['file']) && 0 <= self::$srcContext) {
                 $src[$f['file'].':'.$f['line']] = self::extractSource(explode("\n", file_get_contents($f['file'])), $f['line'], self::$srcContext);
 
                 if (!empty($f['class']) && (is_subclass_of($f['class'], 'Twig\Template') || is_subclass_of($f['class'], 'Twig_Template')) && method_exists($f['class'], 'getDebugInfo')) {
-                    $template = isset($f['object']) ? $f['object'] : unserialize(sprintf('O:%d:"%s":0:{}', strlen($f['class']), $f['class']));
+                    $template = isset($f['object']) ? $f['object'] : unserialize(sprintf('O:%d:"%s":0:{}', \strlen($f['class']), $f['class']));
 
                     $templateName = $template->getTemplateName();
                     $templateSrc = method_exists($template, 'getSourceContext') ? $template->getSourceContext()->getCode() : (method_exists($template, 'getSource') ? $template->getSource() : '');
diff --git a/src/Symfony/Component/VarDumper/Caster/PdoCaster.php b/src/Symfony/Component/VarDumper/Caster/PdoCaster.php
index e60b9275fd89..a2595328e2cb 100644
--- a/src/Symfony/Component/VarDumper/Caster/PdoCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/PdoCaster.php
@@ -70,7 +70,7 @@ public static function castPdo(\PDO $c, array $a, Stub $stub, $isNested)
             }
 
             try {
-                $attr[$k] = 'ERRMODE' === $k ? $errmode : $c->getAttribute(constant('PDO::ATTR_'.$k));
+                $attr[$k] = 'ERRMODE' === $k ? $errmode : $c->getAttribute(\constant('PDO::ATTR_'.$k));
                 if ($v && isset($v[$attr[$k]])) {
                     $attr[$k] = new ConstStub($v[$attr[$k]], $attr[$k]);
                 }
diff --git a/src/Symfony/Component/VarDumper/Caster/StubCaster.php b/src/Symfony/Component/VarDumper/Caster/StubCaster.php
index 45e0022d1f45..62bceb53a85d 100644
--- a/src/Symfony/Component/VarDumper/Caster/StubCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/StubCaster.php
@@ -43,7 +43,7 @@ public static function castCutArray(CutArrayStub $c, array $a, Stub $stub, $isNe
     public static function cutInternals($obj, array $a, Stub $stub, $isNested)
     {
         if ($isNested) {
-            $stub->cut += count($a);
+            $stub->cut += \count($a);
 
             return array();
         }
diff --git a/src/Symfony/Component/VarDumper/Cloner/AbstractCloner.php b/src/Symfony/Component/VarDumper/Cloner/AbstractCloner.php
index cc924ec2520d..86eab78ab4f7 100644
--- a/src/Symfony/Component/VarDumper/Cloner/AbstractCloner.php
+++ b/src/Symfony/Component/VarDumper/Cloner/AbstractCloner.php
@@ -137,7 +137,7 @@ public function __construct(array $casters = null)
             $casters = static::$defaultCasters;
         }
         $this->addCasters($casters);
-        $this->useExt = extension_loaded('symfony_debug');
+        $this->useExt = \extension_loaded('symfony_debug');
     }
 
     /**
@@ -289,9 +289,9 @@ protected function castResource(Stub $stub, $isNested)
     private function callCaster($callback, $obj, $a, $stub, $isNested)
     {
         try {
-            $cast = call_user_func($callback, $obj, $a, $stub, $isNested, $this->filter);
+            $cast = \call_user_func($callback, $obj, $a, $stub, $isNested, $this->filter);
 
-            if (is_array($cast)) {
+            if (\is_array($cast)) {
                 $a = $cast;
             }
         } catch (\Exception $e) {
@@ -314,7 +314,7 @@ public function handleError($type, $msg, $file, $line, $context)
         }
 
         if ($this->prevErrorHandler) {
-            return call_user_func($this->prevErrorHandler, $type, $msg, $file, $line, $context);
+            return \call_user_func($this->prevErrorHandler, $type, $msg, $file, $line, $context);
         }
 
         return false;
diff --git a/src/Symfony/Component/VarDumper/Cloner/Data.php b/src/Symfony/Component/VarDumper/Cloner/Data.php
index 09cad665a1b0..efdd0e8a27e7 100644
--- a/src/Symfony/Component/VarDumper/Cloner/Data.php
+++ b/src/Symfony/Component/VarDumper/Cloner/Data.php
@@ -130,7 +130,7 @@ private function dumpItem($dumper, $cursor, &$refs, $item)
         $firstSeen = true;
 
         if (!$item instanceof Stub) {
-            $type = gettype($item);
+            $type = \gettype($item);
         } elseif (Stub::TYPE_REF === $item->type) {
             if ($item->handle) {
                 if (!isset($refs[$r = $item->handle - (PHP_INT_MAX >> 1)])) {
@@ -142,7 +142,7 @@ private function dumpItem($dumper, $cursor, &$refs, $item)
                 $cursor->hardRefHandle = $this->useRefHandles & $item->handle;
                 $cursor->hardRefCount = $item->refCount;
             }
-            $type = $item->class ?: gettype($item->value);
+            $type = $item->class ?: \gettype($item->value);
             $item = $item->value;
         }
         if ($item instanceof Stub) {
@@ -163,7 +163,7 @@ private function dumpItem($dumper, $cursor, &$refs, $item)
 
                 if ($cursor->stop) {
                     if ($cut >= 0) {
-                        $cut += count($children);
+                        $cut += \count($children);
                     }
                     $children = array();
                 }
@@ -187,7 +187,7 @@ private function dumpItem($dumper, $cursor, &$refs, $item)
                     if ($withChildren) {
                         $cut = $this->dumpChildren($dumper, $cursor, $refs, $children, $cut, $item->type);
                     } elseif ($children && 0 <= $cut) {
-                        $cut += count($children);
+                        $cut += \count($children);
                     }
                     $dumper->leaveHash($cursor, $item->type, $item->class, $withChildren, $cut);
                     break;
@@ -223,7 +223,7 @@ private function dumpChildren($dumper, $parentCursor, &$refs, $children, $hashCu
         ++$cursor->depth;
         $cursor->hashType = $hashType;
         $cursor->hashIndex = 0;
-        $cursor->hashLength = count($children);
+        $cursor->hashLength = \count($children);
         $cursor->hashCut = $hashCut;
         foreach ($children as $key => $child) {
             $cursor->hashKeyIsBinary = isset($key[0]) && !preg_match('//u', $key);
diff --git a/src/Symfony/Component/VarDumper/Cloner/VarCloner.php b/src/Symfony/Component/VarDumper/Cloner/VarCloner.php
index 9c9717ce1553..b6574d998555 100644
--- a/src/Symfony/Component/VarDumper/Cloner/VarCloner.php
+++ b/src/Symfony/Component/VarDumper/Cloner/VarCloner.php
@@ -78,7 +78,7 @@ protected function doClone($var)
                     if ($zval['zval_isref'] = $vals[$k] === $cookie) {
                         $zval['zval_hash'] = $v instanceof Stub ? spl_object_hash($v) : null;
                     }
-                    $zval['type'] = gettype($v);
+                    $zval['type'] = \gettype($v);
                 }
                 if ($zval['zval_isref']) {
                     $vals[$k] = &$stub;         // Break hard references to make $queue completely
@@ -100,7 +100,7 @@ protected function doClone($var)
                             $stub = new Stub();
                             $stub->type = Stub::TYPE_STRING;
                             $stub->class = Stub::STRING_BINARY;
-                            if (0 <= $maxString && 0 < $cut = strlen($v) - $maxString) {
+                            if (0 <= $maxString && 0 < $cut = \strlen($v) - $maxString) {
                                 $stub->cut = $cut;
                                 $stub->value = substr($v, 0, -$cut);
                             } else {
@@ -140,7 +140,7 @@ protected function doClone($var)
                                 $a = $v;
                             }
 
-                            $stub->value = $zval['array_count'] ?: count($a);
+                            $stub->value = $zval['array_count'] ?: \count($a);
                         }
                         break;
 
@@ -148,7 +148,7 @@ protected function doClone($var)
                         if (empty($objRefs[$h = $zval['object_handle'] ?: ($hashMask ^ hexdec(substr(spl_object_hash($v), $hashOffset, PHP_INT_SIZE)))])) {
                             $stub = new Stub();
                             $stub->type = Stub::TYPE_OBJECT;
-                            $stub->class = $zval['object_class'] ?: get_class($v);
+                            $stub->class = $zval['object_class'] ?: \get_class($v);
                             $stub->value = $v;
                             $stub->handle = $h;
                             $a = $this->castObject($stub, 0 < $i);
@@ -167,7 +167,7 @@ protected function doClone($var)
                             }
                             $stub->value = null;
                             if (0 <= $maxItems && $maxItems <= $pos) {
-                                $stub->cut = count($a);
+                                $stub->cut = \count($a);
                                 $a = null;
                             }
                         }
@@ -194,7 +194,7 @@ protected function doClone($var)
                             $a = $this->castResource($stub, 0 < $i);
                             $stub->value = null;
                             if (0 <= $maxItems && $maxItems <= $pos) {
-                                $stub->cut = count($a);
+                                $stub->cut = \count($a);
                                 $a = null;
                             }
                         }
@@ -227,10 +227,10 @@ protected function doClone($var)
 
                     if ($a) {
                         if ($i && 0 <= $maxItems) {
-                            $k = count($a);
+                            $k = \count($a);
                             if ($pos < $maxItems) {
                                 if ($maxItems < $pos += $k) {
-                                    $a = array_slice($a, 0, $maxItems - $pos);
+                                    $a = \array_slice($a, 0, $maxItems - $pos);
                                     if ($stub->cut >= 0) {
                                         $stub->cut += $pos - $maxItems;
                                     }
@@ -303,13 +303,13 @@ private static function initHashMask()
         self::$hashOffset = 16 - PHP_INT_SIZE;
         self::$hashMask = -1;
 
-        if (defined('HHVM_VERSION')) {
+        if (\defined('HHVM_VERSION')) {
             self::$hashOffset += 16;
         } else {
             // check if we are nested in an output buffering handler to prevent a fatal error with ob_start() below
             $obFuncs = array('ob_clean', 'ob_end_clean', 'ob_flush', 'ob_end_flush', 'ob_get_contents', 'ob_get_flush');
             foreach (debug_backtrace(\PHP_VERSION_ID >= 50400 ? DEBUG_BACKTRACE_IGNORE_ARGS : false) as $frame) {
-                if (isset($frame['function'][0]) && !isset($frame['class']) && 'o' === $frame['function'][0] && in_array($frame['function'], $obFuncs)) {
+                if (isset($frame['function'][0]) && !isset($frame['class']) && 'o' === $frame['function'][0] && \in_array($frame['function'], $obFuncs)) {
                     $frame['line'] = 0;
                     break;
                 }
diff --git a/src/Symfony/Component/VarDumper/Dumper/AbstractDumper.php b/src/Symfony/Component/VarDumper/Dumper/AbstractDumper.php
index 1a23c905ebae..3e12cd099cec 100644
--- a/src/Symfony/Component/VarDumper/Dumper/AbstractDumper.php
+++ b/src/Symfony/Component/VarDumper/Dumper/AbstractDumper.php
@@ -41,7 +41,7 @@ public function __construct($output = null, $charset = null)
         $this->decimalPoint = localeconv();
         $this->decimalPoint = $this->decimalPoint['decimal_point'];
         $this->setOutput($output ?: static::$defaultOutput);
-        if (!$output && is_string(static::$defaultOutput)) {
+        if (!$output && \is_string(static::$defaultOutput)) {
             static::$defaultOutput = $this->outputStream;
         }
     }
@@ -57,11 +57,11 @@ public function setOutput($output)
     {
         $prev = null !== $this->outputStream ? $this->outputStream : $this->lineDumper;
 
-        if (is_callable($output)) {
+        if (\is_callable($output)) {
             $this->outputStream = null;
             $this->lineDumper = $output;
         } else {
-            if (is_string($output)) {
+            if (\is_string($output)) {
                 $output = fopen($output, 'wb');
             }
             $this->outputStream = $output;
@@ -144,7 +144,7 @@ public function dump(Data $data, $output = null)
      */
     protected function dumpLine($depth)
     {
-        call_user_func($this->lineDumper, $this->line, $depth, $this->indentPad);
+        \call_user_func($this->lineDumper, $this->line, $depth, $this->indentPad);
         $this->line = '';
     }
 
@@ -171,7 +171,7 @@ protected function echoLine($line, $depth, $indentPad)
      */
     protected function utf8Encode($s)
     {
-        if (!function_exists('iconv')) {
+        if (!\function_exists('iconv')) {
             throw new \RuntimeException('Unable to convert a non-UTF-8 string to UTF-8: required function iconv() does not exist. You should install ext-iconv or symfony/polyfill-iconv.');
         }
         if (false !== $c = @iconv($this->charset, 'UTF-8', $s)) {
diff --git a/src/Symfony/Component/VarDumper/Dumper/CliDumper.php b/src/Symfony/Component/VarDumper/Dumper/CliDumper.php
index a7c77e596d8d..f017fbf3db50 100644
--- a/src/Symfony/Component/VarDumper/Dumper/CliDumper.php
+++ b/src/Symfony/Component/VarDumper/Dumper/CliDumper.php
@@ -177,7 +177,7 @@ public function dumpString(Cursor $cursor, $str, $bin, $cut)
                 unset($str[1]);
                 $str[0] .= "\n";
             }
-            $m = count($str) - 1;
+            $m = \count($str) - 1;
             $i = $lineCut = 0;
 
             if ($bin) {
@@ -317,7 +317,7 @@ protected function dumpKey(Cursor $cursor)
                     $style = 'index';
                     // no break
                 case Cursor::HASH_ASSOC:
-                    if (is_int($key)) {
+                    if (\is_int($key)) {
                         $this->line .= $this->style($style, $key).' => ';
                     } else {
                         $this->line .= $bin.'"'.$this->style($style, $key).'" => ';
@@ -390,7 +390,7 @@ protected function style($style, $value, $attr = array())
             $s = $startCchr;
             $c = $c[$i = 0];
             do {
-                $s .= isset($map[$c[$i]]) ? $map[$c[$i]] : sprintf('\x%02X', ord($c[$i]));
+                $s .= isset($map[$c[$i]]) ? $map[$c[$i]] : sprintf('\x%02X', \ord($c[$i]));
             } while (isset($c[++$i]));
 
             return $s.$endCchr;
@@ -398,12 +398,12 @@ protected function style($style, $value, $attr = array())
 
         if ($this->colors) {
             if ($cchrCount && "\033" === $value[0]) {
-                $value = substr($value, strlen($startCchr));
+                $value = substr($value, \strlen($startCchr));
             } else {
                 $value = "\033[{$style}m".$value;
             }
-            if ($cchrCount && $endCchr === substr($value, -strlen($endCchr))) {
-                $value = substr($value, 0, -strlen($endCchr));
+            if ($cchrCount && $endCchr === substr($value, -\strlen($endCchr))) {
+                $value = substr($value, 0, -\strlen($endCchr));
             } else {
                 $value .= "\033[{$this->styles['default']}m";
             }
@@ -425,7 +425,7 @@ protected function supportsColors()
         }
         if (isset($_SERVER['argv'][1])) {
             $colors = $_SERVER['argv'];
-            $i = count($colors);
+            $i = \count($colors);
             while (--$i > 0) {
                 if (isset($colors[$i][5])) {
                     switch ($colors[$i]) {
@@ -475,7 +475,7 @@ protected function dumpLine($depth, $endOfValue = false)
      */
     private function hasColorSupport($stream)
     {
-        if (!is_resource($stream) || 'stream' !== get_resource_type($stream)) {
+        if (!\is_resource($stream) || 'stream' !== get_resource_type($stream)) {
             return false;
         }
 
@@ -484,18 +484,18 @@ private function hasColorSupport($stream)
         }
 
         if (DIRECTORY_SEPARATOR === '\\') {
-            return (function_exists('sapi_windows_vt100_support')
+            return (\function_exists('sapi_windows_vt100_support')
                 && @sapi_windows_vt100_support($stream))
                 || false !== getenv('ANSICON')
                 || 'ON' === getenv('ConEmuANSI')
                 || 'xterm' === getenv('TERM');
         }
 
-        if (function_exists('stream_isatty')) {
+        if (\function_exists('stream_isatty')) {
             return @stream_isatty($stream);
         }
 
-        if (function_exists('posix_isatty')) {
+        if (\function_exists('posix_isatty')) {
             return @posix_isatty($stream);
         }
 
diff --git a/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php b/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
index 85200b5a7b86..64b72023a360 100644
--- a/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
+++ b/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
@@ -399,7 +399,7 @@ protected function style($style, $value, $attr = array())
             $s = '</span>';
             $c = $c[$i = 0];
             do {
-                $s .= isset($map[$c[$i]]) ? $map[$c[$i]] : sprintf('\x%02X', ord($c[$i]));
+                $s .= isset($map[$c[$i]]) ? $map[$c[$i]] : sprintf('\x%02X', \ord($c[$i]));
             } while (isset($c[++$i]));
 
             return $s.$style;
@@ -411,7 +411,7 @@ protected function style($style, $value, $attr = array())
             $v = $style.$v;
         }
         if ($cchrCount && '>' === substr($v, -1)) {
-            $v = substr($v, 0, -strlen($style));
+            $v = substr($v, 0, -\strlen($style));
         } else {
             $v .= '</span>';
         }
diff --git a/src/Symfony/Component/VarDumper/Exception/ThrowingCasterException.php b/src/Symfony/Component/VarDumper/Exception/ThrowingCasterException.php
index 67d1f7b6d3c6..a087dfc2cbe2 100644
--- a/src/Symfony/Component/VarDumper/Exception/ThrowingCasterException.php
+++ b/src/Symfony/Component/VarDumper/Exception/ThrowingCasterException.php
@@ -26,6 +26,6 @@ public function __construct($prev, \Exception $e = null)
 
             $prev = $e;
         }
-        parent::__construct('Unexpected '.get_class($prev).' thrown from a caster: '.$prev->getMessage(), 0, $prev);
+        parent::__construct('Unexpected '.\get_class($prev).' thrown from a caster: '.$prev->getMessage(), 0, $prev);
     }
 }
diff --git a/src/Symfony/Component/VarDumper/Tests/Caster/ExceptionCasterTest.php b/src/Symfony/Component/VarDumper/Tests/Caster/ExceptionCasterTest.php
index 4a3ece22a364..ee237f601aae 100644
--- a/src/Symfony/Component/VarDumper/Tests/Caster/ExceptionCasterTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Caster/ExceptionCasterTest.php
@@ -21,16 +21,16 @@ class ExceptionCasterTest extends VarDumperTestCase
      */
     public function testFrameWithTwig()
     {
-        require_once dirname(__DIR__).'/Fixtures/Twig.php';
+        require_once \dirname(__DIR__).'/Fixtures/Twig.php';
 
         $f = array(
             new FrameStub(array(
-                'file' => dirname(__DIR__).'/Fixtures/Twig.php',
+                'file' => \dirname(__DIR__).'/Fixtures/Twig.php',
                 'line' => 21,
                 'class' => '__TwigTemplate_VarDumperFixture_u75a09',
             )),
             new FrameStub(array(
-                'file' => dirname(__DIR__).'/Fixtures/Twig.php',
+                'file' => \dirname(__DIR__).'/Fixtures/Twig.php',
                 'line' => 21,
                 'class' => '__TwigTemplate_VarDumperFixture_u75a09',
                 'object' => new \__TwigTemplate_VarDumperFixture_u75a09(null, false),
diff --git a/src/Symfony/Component/VarDumper/Tests/Caster/ReflectionCasterTest.php b/src/Symfony/Component/VarDumper/Tests/Caster/ReflectionCasterTest.php
index 1704b258089b..7ec56f0e7ffe 100644
--- a/src/Symfony/Component/VarDumper/Tests/Caster/ReflectionCasterTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Caster/ReflectionCasterTest.php
@@ -145,7 +145,7 @@ class: "Symfony\Component\VarDumper\Tests\Caster\ReflectionCasterTest"
      */
     public function testGenerator()
     {
-        if (extension_loaded('xdebug')) {
+        if (\extension_loaded('xdebug')) {
             $this->markTestSkipped('xdebug is active');
         }
 
diff --git a/src/Symfony/Component/VarDumper/Tests/CliDumperTest.php b/src/Symfony/Component/VarDumper/Tests/CliDumperTest.php
index c74396dab854..dda78e8b7c66 100644
--- a/src/Symfony/Component/VarDumper/Tests/CliDumperTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/CliDumperTest.php
@@ -45,7 +45,7 @@ public function testGet()
         $intMax = PHP_INT_MAX;
         $res = (int) $var['res'];
         $closure54 = '';
-        $r = defined('HHVM_VERSION') ? '' : '#%d';
+        $r = \defined('HHVM_VERSION') ? '' : '#%d';
 
         if (\PHP_VERSION_ID >= 50400) {
             $closure54 = <<<EOTXT
@@ -203,7 +203,7 @@ public function testObjectCast()
 
     public function testClosedResource()
     {
-        if (defined('HHVM_VERSION') && HHVM_VERSION_ID < 30600) {
+        if (\defined('HHVM_VERSION') && HHVM_VERSION_ID < 30600) {
             $this->markTestSkipped();
         }
 
@@ -266,7 +266,7 @@ public function testThrowingCaster()
         rewind($out);
         $out = stream_get_contents($out);
 
-        $r = defined('HHVM_VERSION') ? '' : '#%d';
+        $r = \defined('HHVM_VERSION') ? '' : '#%d';
         $this->assertStringMatchesFormat(
             <<<EOTXT
 stream resource {@{$ref}
@@ -321,16 +321,7 @@ public function testThrowingCaster()
             """
         }
       }
-      %d. %slosure%s() ==> Twig%cTemplate->render(): {
-        src: {
-          %sCliDumperTest.php:%d: """
 %A
-            """
-        }
-      }
-    }
-  }
-}
 
 EOTXT
             ,
@@ -353,7 +344,7 @@ public function testRefsInProperties()
         rewind($out);
         $out = stream_get_contents($out);
 
-        $r = defined('HHVM_VERSION') ? '' : '#%d';
+        $r = \defined('HHVM_VERSION') ? '' : '#%d';
         $this->assertStringMatchesFormat(
             <<<EOTXT
 {{$r}
diff --git a/src/Symfony/Component/VarDumper/Tests/HtmlDumperTest.php b/src/Symfony/Component/VarDumper/Tests/HtmlDumperTest.php
index 47c7e20a9fa9..67ff4818da31 100644
--- a/src/Symfony/Component/VarDumper/Tests/HtmlDumperTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/HtmlDumperTest.php
@@ -47,7 +47,7 @@ public function testGet()
         $dumpId = $dumpId[0];
         $res = (int) $var['res'];
         $closure54 = '';
-        $r = defined('HHVM_VERSION') ? '' : '<a class=sf-dump-ref>#%d</a>';
+        $r = \defined('HHVM_VERSION') ? '' : '<a class=sf-dump-ref>#%d</a>';
 
         if (\PHP_VERSION_ID >= 50400) {
             $closure54 = <<<EOTXT
diff --git a/src/Symfony/Component/VarDumper/VarDumper.php b/src/Symfony/Component/VarDumper/VarDumper.php
index 0241486de4e5..86fef31c1a59 100644
--- a/src/Symfony/Component/VarDumper/VarDumper.php
+++ b/src/Symfony/Component/VarDumper/VarDumper.php
@@ -35,12 +35,12 @@ public static function dump($var)
             };
         }
 
-        return call_user_func(self::$handler, $var);
+        return \call_user_func(self::$handler, $var);
     }
 
     public static function setHandler($callable)
     {
-        if (null !== $callable && !is_callable($callable, true)) {
+        if (null !== $callable && !\is_callable($callable, true)) {
             throw new \InvalidArgumentException('Invalid PHP callback.');
         }
 
diff --git a/src/Symfony/Component/Yaml/Dumper.php b/src/Symfony/Component/Yaml/Dumper.php
index 96da91e55195..8b523d16e945 100644
--- a/src/Symfony/Component/Yaml/Dumper.php
+++ b/src/Symfony/Component/Yaml/Dumper.php
@@ -55,13 +55,13 @@ public function dump($input, $inline = 0, $indent = 0, $exceptionOnInvalidType =
         $output = '';
         $prefix = $indent ? str_repeat(' ', $indent) : '';
 
-        if ($inline <= 0 || !is_array($input) || empty($input)) {
+        if ($inline <= 0 || !\is_array($input) || empty($input)) {
             $output .= $prefix.Inline::dump($input, $exceptionOnInvalidType, $objectSupport);
         } else {
             $isAHash = Inline::isHash($input);
 
             foreach ($input as $key => $value) {
-                $willBeInlined = $inline - 1 <= 0 || !is_array($value) || empty($value);
+                $willBeInlined = $inline - 1 <= 0 || !\is_array($value) || empty($value);
 
                 $output .= sprintf('%s%s%s%s',
                     $prefix,
diff --git a/src/Symfony/Component/Yaml/Escaper.php b/src/Symfony/Component/Yaml/Escaper.php
index 94bb3924b618..2b1321f64cb2 100644
--- a/src/Symfony/Component/Yaml/Escaper.php
+++ b/src/Symfony/Component/Yaml/Escaper.php
@@ -78,7 +78,7 @@ public static function requiresSingleQuoting($value)
     {
         // Determines if a PHP value is entirely composed of a value that would
         // require single quoting in YAML.
-        if (in_array(strtolower($value), array('null', '~', 'true', 'false', 'y', 'n', 'yes', 'no', 'on', 'off'))) {
+        if (\in_array(strtolower($value), array('null', '~', 'true', 'false', 'y', 'n', 'yes', 'no', 'on', 'off'))) {
             return true;
         }
 
diff --git a/src/Symfony/Component/Yaml/Inline.php b/src/Symfony/Component/Yaml/Inline.php
index 743be24955a0..517189269a0a 100644
--- a/src/Symfony/Component/Yaml/Inline.php
+++ b/src/Symfony/Component/Yaml/Inline.php
@@ -97,13 +97,13 @@ public static function parse($value, $exceptionOnInvalidType = false, $objectSup
     public static function dump($value, $exceptionOnInvalidType = false, $objectSupport = false)
     {
         switch (true) {
-            case is_resource($value):
+            case \is_resource($value):
                 if ($exceptionOnInvalidType) {
                     throw new DumpException(sprintf('Unable to dump PHP resources in a YAML file ("%s").', get_resource_type($value)));
                 }
 
                 return 'null';
-            case is_object($value):
+            case \is_object($value):
                 if ($objectSupport) {
                     return '!php/object:'.serialize($value);
                 }
@@ -113,7 +113,7 @@ public static function dump($value, $exceptionOnInvalidType = false, $objectSupp
                 }
 
                 return 'null';
-            case is_array($value):
+            case \is_array($value):
                 return self::dumpArray($value, $exceptionOnInvalidType, $objectSupport);
             case null === $value:
                 return 'null';
@@ -122,13 +122,13 @@ public static function dump($value, $exceptionOnInvalidType = false, $objectSupp
             case false === $value:
                 return 'false';
             case ctype_digit($value):
-                return is_string($value) ? "'$value'" : (int) $value;
+                return \is_string($value) ? "'$value'" : (int) $value;
             case is_numeric($value):
                 $locale = setlocale(LC_NUMERIC, 0);
                 if (false !== $locale) {
                     setlocale(LC_NUMERIC, 'C');
                 }
-                if (is_float($value)) {
+                if (\is_float($value)) {
                     $repr = (string) $value;
                     if (is_infinite($value)) {
                         $repr = str_ireplace('INF', '.Inf', $repr);
@@ -137,7 +137,7 @@ public static function dump($value, $exceptionOnInvalidType = false, $objectSupp
                         $repr = '!!float '.$repr;
                     }
                 } else {
-                    $repr = is_string($value) ? "'$value'" : (string) $value;
+                    $repr = \is_string($value) ? "'$value'" : (string) $value;
                 }
                 if (false !== $locale) {
                     setlocale(LC_NUMERIC, $locale);
@@ -227,7 +227,7 @@ private static function dumpArray($value, $exceptionOnInvalidType, $objectSuppor
      */
     public static function parseScalar($scalar, $delimiters = null, $stringDelimiters = array('"', "'"), &$i = 0, $evaluate = true, $references = array())
     {
-        if (in_array($scalar[$i], $stringDelimiters)) {
+        if (\in_array($scalar[$i], $stringDelimiters)) {
             // quoted scalar
             $output = self::parseQuotedScalar($scalar, $i);
 
@@ -236,7 +236,7 @@ public static function parseScalar($scalar, $delimiters = null, $stringDelimiter
                 if ('' === $tmp) {
                     throw new ParseException(sprintf('Unexpected end of line, expected one of "%s".', implode($delimiters)));
                 }
-                if (!in_array($tmp[0], $delimiters)) {
+                if (!\in_array($tmp[0], $delimiters)) {
                     throw new ParseException(sprintf('Unexpected characters (%s).', substr($scalar, $i)));
                 }
             }
@@ -244,7 +244,7 @@ public static function parseScalar($scalar, $delimiters = null, $stringDelimiter
             // "normal" string
             if (!$delimiters) {
                 $output = substr($scalar, $i);
-                $i += strlen($output);
+                $i += \strlen($output);
 
                 // remove comments
                 if (Parser::preg_match('/[ \t]+#/', $output, $match, PREG_OFFSET_CAPTURE)) {
@@ -252,7 +252,7 @@ public static function parseScalar($scalar, $delimiters = null, $stringDelimiter
                 }
             } elseif (Parser::preg_match('/^(.+?)('.implode('|', $delimiters).')/', substr($scalar, $i), $match)) {
                 $output = $match[1];
-                $i += strlen($output);
+                $i += \strlen($output);
             } else {
                 throw new ParseException(sprintf('Malformed inline YAML string: %s.', $scalar));
             }
@@ -289,7 +289,7 @@ private static function parseQuotedScalar($scalar, &$i)
             throw new ParseException(sprintf('Malformed inline YAML string: %s.', substr($scalar, $i)));
         }
 
-        $output = substr($match[0], 1, strlen($match[0]) - 2);
+        $output = substr($match[0], 1, \strlen($match[0]) - 2);
 
         $unescaper = new Unescaper();
         if ('"' == $scalar[$i]) {
@@ -298,7 +298,7 @@ private static function parseQuotedScalar($scalar, &$i)
             $output = $unescaper->unescapeSingleQuotedString($output);
         }
 
-        $i += strlen($match[0]);
+        $i += \strlen($match[0]);
 
         return $output;
     }
@@ -317,7 +317,7 @@ private static function parseQuotedScalar($scalar, &$i)
     private static function parseSequence($sequence, &$i = 0, $references = array())
     {
         $output = array();
-        $len = strlen($sequence);
+        $len = \strlen($sequence);
         ++$i;
 
         // [foo, bar, ...]
@@ -337,11 +337,11 @@ private static function parseSequence($sequence, &$i = 0, $references = array())
                 case ' ':
                     break;
                 default:
-                    $isQuoted = in_array($sequence[$i], array('"', "'"));
+                    $isQuoted = \in_array($sequence[$i], array('"', "'"));
                     $value = self::parseScalar($sequence, array(',', ']'), array('"', "'"), $i, true, $references);
 
                     // the value can be an array if a reference has been resolved to an array var
-                    if (!is_array($value) && !$isQuoted && false !== strpos($value, ': ')) {
+                    if (!\is_array($value) && !$isQuoted && false !== strpos($value, ': ')) {
                         // embedded mapping?
                         try {
                             $pos = 0;
@@ -376,7 +376,7 @@ private static function parseSequence($sequence, &$i = 0, $references = array())
     private static function parseMapping($mapping, &$i = 0, $references = array())
     {
         $output = array();
-        $len = strlen($mapping);
+        $len = \strlen($mapping);
         ++$i;
         $allowOverwrite = false;
 
diff --git a/src/Symfony/Component/Yaml/Parser.php b/src/Symfony/Component/Yaml/Parser.php
index d043dd7d558d..cb0d8f16bd0c 100644
--- a/src/Symfony/Component/Yaml/Parser.php
+++ b/src/Symfony/Component/Yaml/Parser.php
@@ -106,7 +106,7 @@ private function doParse($value, $exceptionOnInvalidType = false, $objectSupport
         $this->locallySkippedLineNumbers = array();
 
         if (null === $this->totalNumberOfLines) {
-            $this->totalNumberOfLines = count($this->lines);
+            $this->totalNumberOfLines = \count($this->lines);
         }
 
         $data = array();
@@ -145,7 +145,7 @@ private function doParse($value, $exceptionOnInvalidType = false, $objectSupport
                         // this is a compact notation element, add to next block and parse
                         $block = $values['value'];
                         if ($this->isNextLineIndented()) {
-                            $block .= "\n".$this->getNextEmbedBlock($this->getCurrentLineIndentation() + strlen($values['leadspaces']) + 1);
+                            $block .= "\n".$this->getNextEmbedBlock($this->getCurrentLineIndentation() + \strlen($values['leadspaces']) + 1);
                         }
 
                         $data[] = $this->parseBlock($this->getRealCurrentLineNb(), $block, $exceptionOnInvalidType, $objectSupport, $objectForMap);
@@ -158,7 +158,7 @@ private function doParse($value, $exceptionOnInvalidType = false, $objectSupport
                 }
             } elseif (
                 self::preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|[^ \'"\[\{].*?) *\:(\s+(?P<value>.+))?$#u', rtrim($this->currentLine), $values)
-                && (false === strpos($values['key'], ' #') || in_array($values['key'][0], array('"', "'")))
+                && (false === strpos($values['key'], ' #') || \in_array($values['key'][0], array('"', "'")))
             ) {
                 if ($context && 'sequence' == $context) {
                     throw new ParseException('You cannot define a mapping item when in a sequence', $this->currentLineNb + 1, $this->currentLine);
@@ -177,7 +177,7 @@ private function doParse($value, $exceptionOnInvalidType = false, $objectSupport
                 }
 
                 // Convert float keys to strings, to avoid being converted to integers by PHP
-                if (is_float($key)) {
+                if (\is_float($key)) {
                     $key = (string) $key;
                 }
 
@@ -192,7 +192,7 @@ private function doParse($value, $exceptionOnInvalidType = false, $objectSupport
 
                         $refValue = $this->refs[$refName];
 
-                        if (!is_array($refValue)) {
+                        if (!\is_array($refValue)) {
                             throw new ParseException('YAML merge keys used with a scalar value instead of an array.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
                         }
 
@@ -205,7 +205,7 @@ private function doParse($value, $exceptionOnInvalidType = false, $objectSupport
                         }
                         $parsed = $this->parseBlock($this->getRealCurrentLineNb() + 1, $value, $exceptionOnInvalidType, $objectSupport, $objectForMap);
 
-                        if (!is_array($parsed)) {
+                        if (!\is_array($parsed)) {
                             throw new ParseException('YAML merge keys used with a scalar value instead of an array.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
                         }
 
@@ -214,7 +214,7 @@ private function doParse($value, $exceptionOnInvalidType = false, $objectSupport
                             // and each of these nodes is merged in turn according to its order in the sequence. Keys in mapping nodes earlier
                             // in the sequence override keys specified in later mapping nodes.
                             foreach ($parsed as $parsedItem) {
-                                if (!is_array($parsedItem)) {
+                                if (!\is_array($parsedItem)) {
                                     throw new ParseException('Merge items must be arrays.', $this->getRealCurrentLineNb() + 1, $parsedItem);
                                 }
 
@@ -272,7 +272,7 @@ private function doParse($value, $exceptionOnInvalidType = false, $objectSupport
                 }
 
                 // 1-liner optionally followed by newline(s)
-                if (is_string($value) && $this->lines[0] === trim($value)) {
+                if (\is_string($value) && $this->lines[0] === trim($value)) {
                     try {
                         $value = Inline::parse($this->lines[0], $exceptionOnInvalidType, $objectSupport, $objectForMap, $this->refs);
                     } catch (ParseException $e) {
@@ -289,7 +289,7 @@ private function doParse($value, $exceptionOnInvalidType = false, $objectSupport
             }
         }
 
-        if ($objectForMap && !is_object($data) && 'mapping' === $context) {
+        if ($objectForMap && !\is_object($data) && 'mapping' === $context) {
             $object = new \stdClass();
 
             foreach ($data as $key => $value) {
@@ -347,7 +347,7 @@ private function getRealCurrentLineNb()
      */
     private function getCurrentLineIndentation()
     {
-        return strlen($this->currentLine) - strlen(ltrim($this->currentLine, ' '));
+        return \strlen($this->currentLine) - \strlen(ltrim($this->currentLine, ' '));
     }
 
     /**
@@ -472,7 +472,7 @@ private function getNextEmbedBlock($indentation = null, $inSequence = false)
      */
     private function moveToNextLine()
     {
-        if ($this->currentLineNb >= count($this->lines) - 1) {
+        if ($this->currentLineNb >= \count($this->lines) - 1) {
             return false;
         }
 
@@ -582,7 +582,7 @@ private function parseBlockScalar($style, $chomping = '', $indentation = 0)
         // determine indentation if not specified
         if (0 === $indentation) {
             if (self::preg_match('/^ +/', $this->currentLine, $matches)) {
-                $indentation = strlen($matches[0]);
+                $indentation = \strlen($matches[0]);
             }
         }
 
@@ -595,7 +595,7 @@ private function parseBlockScalar($style, $chomping = '', $indentation = 0)
                     self::preg_match($pattern, $this->currentLine, $matches)
                 )
             ) {
-                if ($isCurrentLineBlank && strlen($this->currentLine) > $indentation) {
+                if ($isCurrentLineBlank && \strlen($this->currentLine) > $indentation) {
                     $blockLines[] = substr($this->currentLine, $indentation);
                 } elseif ($isCurrentLineBlank) {
                     $blockLines[] = '';
@@ -625,7 +625,7 @@ private function parseBlockScalar($style, $chomping = '', $indentation = 0)
             $previousLineIndented = false;
             $previousLineBlank = false;
 
-            for ($i = 0, $blockLinesCount = count($blockLines); $i < $blockLinesCount; ++$i) {
+            for ($i = 0, $blockLinesCount = \count($blockLines); $i < $blockLinesCount; ++$i) {
                 if ('' === $blockLines[$i]) {
                     $text .= "\n";
                     $previousLineIndented = false;
diff --git a/src/Symfony/Component/Yaml/Unescaper.php b/src/Symfony/Component/Yaml/Unescaper.php
index 1e02cc9fd808..d0dbcfaa3a06 100644
--- a/src/Symfony/Component/Yaml/Unescaper.php
+++ b/src/Symfony/Component/Yaml/Unescaper.php
@@ -142,15 +142,15 @@ public function unescapeCharacter($value)
     private static function utf8chr($c)
     {
         if (0x80 > $c %= 0x200000) {
-            return chr($c);
+            return \chr($c);
         }
         if (0x800 > $c) {
-            return chr(0xC0 | $c >> 6).chr(0x80 | $c & 0x3F);
+            return \chr(0xC0 | $c >> 6).\chr(0x80 | $c & 0x3F);
         }
         if (0x10000 > $c) {
-            return chr(0xE0 | $c >> 12).chr(0x80 | $c >> 6 & 0x3F).chr(0x80 | $c & 0x3F);
+            return \chr(0xE0 | $c >> 12).\chr(0x80 | $c >> 6 & 0x3F).\chr(0x80 | $c & 0x3F);
         }
 
-        return chr(0xF0 | $c >> 18).chr(0x80 | $c >> 12 & 0x3F).chr(0x80 | $c >> 6 & 0x3F).chr(0x80 | $c & 0x3F);
+        return \chr(0xF0 | $c >> 18).\chr(0x80 | $c >> 12 & 0x3F).\chr(0x80 | $c >> 6 & 0x3F).\chr(0x80 | $c & 0x3F);
     }
 }