Initialized variables and properties

src/Stash/Driver/Apc.php

@@ -25,6 +25,7 @@ class Apc implements DriverInterface
 {
     protected $ttl = 300;
     protected $apcNamespace;
+    protected $chunkSize = 100;
 
     /**
      * This function should takes an array which is used to pass option values to the driver.
@@ -68,7 +69,7 @@ public function __destruct()
     public function getData($key)
     {
         $keyString = self::makeKey($key);
-
+        $success = null;
         $data = apc_fetch($keyString, $success);
 
         return $success ? $data : false;
@@ -127,6 +128,7 @@ public function purge()
         $chunkSize = isset($this->chunkSize) && is_numeric($this->chunkSize) ? $this->chunkSize : 100;
         $it = new \APCIterator('user', $keyRegex, \APC_ITER_KEY, $chunkSize);
         foreach ($it as $key) {
+            $success = null;
             $data = apc_fetch($key, $success);
             $data = $data[$key['key']];
 

src/Stash/Driver/FileSystem.php

@@ -63,7 +63,7 @@ class FileSystem implements DriverInterface
     protected $filePermissions;
     protected $dirPermissions;
     protected $directorySplit;
-
+    protected $keyHashFunction;
     protected $disabled = false;
 
     protected $defaultOptions = array('filePermissions' => 0660,
@@ -146,7 +146,7 @@ protected static function getDataFromFile($path)
         // possible that the item exists as null, so we have to make sure that
         // it's both unset and not null. The downside to this is that the
         // is_null function will issue a warning on an item that isn't set.
-        // So we're stuck testing and surpressing the warning.
+        // So we're stuck testing and suppressing the warning.
 
         // Item exists
         // isset + is_null = true + false = true

src/Stash/Driver/Memcache.php

@@ -144,6 +144,8 @@ protected function makeKeyString($key, $path = false)
         $key = \Stash\Utilities::normalizeKeys($key);
 
         $keyString = 'cache:::';
+        $pathKey = ':pathdb::';
+
         foreach ($key as $name) {
             //a. cache:::name
             //b. cache:::name0:::sub

src/Stash/Driver/Redis.php

@@ -188,6 +188,7 @@ protected function makeKeyString($key, $path = false)
         $key = \Stash\Utilities::normalizeKeys($key);
 
         $keyString = 'cache:::';
+        $pathKey = ':pathdb::';
         foreach ($key as $name) {
             //a. cache:::name
             //b. cache:::name0:::sub

src/Stash/Driver/Sub/Memcached.php

@@ -147,6 +147,7 @@ public function get($key)
 
     public function cas($key, $value)
     {
+        $token = null;
         if (($rValue = $this->memcached->get($key, null, $token)) !== false) {
             return $rValue;
         }