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[READ-ONLY] Subtree split of the Symfony Validator Component -- clone into Symfony/Component/ (master at symfony/symfony)
PHP

Merge branch '2.8'

* 2.8:
  [Locale] Add missing @group legacy annotations
  [Form] Add missing @group legacy annotations
  [Form] Use FQCN form types
  Fix security-acl deps
  Fix typo
  [Security] Removed security-acl from the core
  fixed typos
  Fix doctrine mapping validation type error
  Remove skipping of tests based on ICU data version whenever possible
  Fix the handling of null as locale in the stub intl classes
  do not dump leading backslashes in class names
  fix issue #15377
  Skip ::class constant
  [Config] type specific check for emptiness
  [Form] Deprecated FormTypeInterface::getName() and passing of type instances

Conflicts:
	UPGRADE-2.8.md
	composer.json
	src/Symfony/Bridge/Doctrine/composer.json
	src/Symfony/Bridge/Twig/composer.json
	src/Symfony/Bundle/SecurityBundle/composer.json
	src/Symfony/Component/ClassLoader/ClassMapGenerator.php
	src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php
	src/Symfony/Component/Form/Tests/AbstractExtensionTest.php
	src/Symfony/Component/Form/Tests/AbstractLayoutTest.php
	src/Symfony/Component/Form/Tests/SimpleFormTest.php
	src/Symfony/Component/Locale/Tests/LocaleTest.php
	src/Symfony/Component/Locale/Tests/Stub/StubLocaleTest.php
	src/Symfony/Component/Security/Acl/README.md
	src/Symfony/Component/Security/Acl/composer.json
Failed to load latest commit information.
Constraints Merge branch '2.7' into 2.8
Context Silence invasive deprecation warnings, opt-in for warnings
Exception [Validator] Improved performance of *ContextualValidator::validate()
Mapping Silence invasive deprecation warnings, opt-in for warnings
Resources/translations fixed typo in translation keys
Tests Merge branch '2.8'
Util [Validator] Property paths starting with 0 are broken.
Validator Merge branch '2.6' into 2.7
Violation [Validator] Added missing error codes and turned codes into UUIDs
.gitignore Added missing files .gitignore
CHANGELOG.md [Validator] Deprecated PHP7-incompatible constraints and related vali…
ClassBasedInterface.php Normalized @deprecated annotations.
Constraint.php Merge branch '2.3' into 2.6
ConstraintValidator.php Silence invasive deprecation warnings, opt-in for warnings
ConstraintValidatorFactory.php Merge branch '2.4'
ConstraintValidatorFactoryInterface.php removed unneeded use statements
ConstraintValidatorInterface.php [Validator] Refactored the GraphWalker into an implementation of the …
ConstraintViolation.php Silence invasive deprecation warnings, opt-in for warnings
ConstraintViolationInterface.php [Validator] Added missing error codes and turned codes into UUIDs
ConstraintViolationList.php made {@inheritdoc} annotations consistent across the board
ConstraintViolationListInterface.php Docblock fixes
DefaultTranslator.php Silence invasive deprecation warnings, opt-in for warnings
ExecutionContext.php Silence invasive deprecation warnings, opt-in for warnings
ExecutionContextInterface.php fixed merge
GlobalExecutionContextInterface.php Normalized @deprecated annotations.
GroupSequenceProviderInterface.php fixed CS
LICENSE Updated copyright to 2015
MetadataFactoryInterface.php Normalized @deprecated annotations.
MetadataInterface.php Normalized @deprecated annotations.
ObjectInitializerInterface.php [Validator] Refactored the GraphWalker into an implementation of the …
PropertyMetadataContainerInterface.php Normalized @deprecated annotations.
PropertyMetadataInterface.php Normalized @deprecated annotations.
README.md Merge branch '2.8'
Validation.php removed the Validator BC layer for PHP < 5.3.9
ValidationVisitor.php Silence invasive deprecation warnings, opt-in for warnings
ValidationVisitorInterface.php [Validator] adds more deprecation notices.
Validator.php Silence invasive deprecation warnings, opt-in for warnings
ValidatorBuilder.php Silence invasive deprecation warnings, opt-in for warnings
ValidatorBuilderInterface.php [Validator] deprecated API version
ValidatorInterface.php Merge branch '2.6' into 2.7
composer.json Merge branch '2.8'
phpunit.xml.dist [2.3] require-dev PHPUnit bridge

README.md

Validator Component

This component is based on the JSR-303 Bean Validation specification and enables specifying validation rules for classes using XML, YAML, PHP or annotations, which can then be checked against instances of these classes.

Usage

The component provides "validation constraints", which are simple objects containing the rules for the validation. Let's validate a simple string as an example:

use Symfony\Component\Validator\Validation;
use Symfony\Component\Validator\Constraints\Length;

$validator = Validation::createValidator();

$violations = $validator->validateValue('Bernhard', new Length(array('min' => 10)));

This validation will fail because the given string is shorter than ten characters. The precise errors, here called "constraint violations", are returned by the validator. You can analyze these or return them to the user. If the violation list is empty, validation succeeded.

Validation of arrays is possible using the Collection constraint:

use Symfony\Component\Validator\Validation;
use Symfony\Component\Validator\Constraints as Assert;

$validator = Validation::createValidator();

$constraint = new Assert\Collection(array(
    'name' => new Assert\Collection(array(
        'first_name' => new Assert\Length(array('min' => 101)),
        'last_name' => new Assert\Length(array('min' => 1)),
    )),
    'email' => new Assert\Email(),
    'simple' => new Assert\Length(array('min' => 102)),
    'gender' => new Assert\Choice(array(3, 4)),
    'file' => new Assert\File(),
    'password' => new Assert\Length(array('min' => 60)),
));

$violations = $validator->validateValue($input, $constraint);

Again, the validator returns the list of violations.

Validation of objects is possible using "constraint mapping". With such a mapping you can put constraints onto properties and objects of classes. Whenever an object of this class is validated, its properties and method results are matched against the constraints.

use Symfony\Component\Validator\Validation;
use Symfony\Component\Validator\Constraints as Assert;

class User
{
    /**
     * @Assert\Length(min = 3)
     * @Assert\NotBlank
     */
    private $name;

    /**
     * @Assert\Email
     * @Assert\NotBlank
     */
    private $email;

    public function __construct($name, $email)
    {
        $this->name = $name;
        $this->email = $email;
    }

    /**
     * @Assert\IsTrue(message = "The user should have a Google Mail account")
     */
    public function isGmailUser()
    {
        return false !== strpos($this->email, '@gmail.com');
    }
}

$validator = Validation::createValidatorBuilder()
    ->enableAnnotationMapping()
    ->getValidator();

$user = new User('John Doe', 'john@example.com');

$violations = $validator->validate($user);

This example uses the annotation support of Doctrine Common to map constraints to properties and methods. You can also map constraints using XML, YAML or plain PHP, if you dislike annotations or don't want to include Doctrine. Check the documentation for more information about these drivers.

Resources

Silex integration:

https://github.com/fabpot/Silex/blob/master/src/Silex/Provider/ValidatorServiceProvider.php

Documentation:

https://symfony.com/doc/3.0/book/validation.html

JSR-303 Specification:

http://jcp.org/en/jsr/detail?id=303

You can run the unit tests with the following command:

$ cd path/to/Symfony/Component/Validator/
$ composer install
$ phpunit
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