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- 27.10.2014
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MemcacheSessionHandler.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\HttpFoundation\Session\Storage\Handler;
013
014 /**
015 * MemcacheSessionHandler.
016 *
017 * @author Drak <drak@zikula.org>
018 */
019 class MemcacheSessionHandler implements \SessionHandlerInterface
020 {
021 /**
022 * @var \Memcache Memcache driver.
023 */
024 private $memcache;
025
026 /**
027 * @var int Time to live in seconds
028 */
029 private $ttl;
030
031 /**
032 * @var string Key prefix for shared environments.
033 */
034 private $prefix;
035
036 /**
037 * Constructor.
038 *
039 * List of available options:
040 * * prefix: The prefix to use for the memcache keys in order to avoid collision
041 * * expiretime: The time to live in seconds
042 *
043 * @param \Memcache $memcache A \Memcache instance
044 * @param array $options An associative array of Memcache options
045 *
046 * @throws \InvalidArgumentException When unsupported options are passed
047 */
048 public function __construct(\Memcache $memcache, array $options = array())
049 {
050 if ($diff = array_diff(array_keys($options), array('prefix', 'expiretime'))) {
051 throw new \InvalidArgumentException(sprintf(
052 'The following options are not supported "%s"', implode(', ', $diff)
053 ));
054 }
055
056 $this->memcache = $memcache;
057 $this->ttl = isset($options['expiretime']) ? (int) $options['expiretime'] : 86400;
058 $this->prefix = isset($options['prefix']) ? $options['prefix'] : 'sf2s';
059 }
060
061 /**
062 * {@inheritdoc}
063 */
064 public function open($savePath, $sessionName)
065 {
066 return true;
067 }
068
069 /**
070 * {@inheritdoc}
071 */
072 public function close()
073 {
074 return $this->memcache->close();
075 }
076
077 /**
078 * {@inheritdoc}
079 */
080 public function read($sessionId)
081 {
082 return $this->memcache->get($this->prefix.$sessionId) ?: '';
083 }
084
085 /**
086 * {@inheritdoc}
087 */
088 public function write($sessionId, $data)
089 {
090 return $this->memcache->set($this->prefix.$sessionId, $data, 0, time() + $this->ttl);
091 }
092
093 /**
094 * {@inheritdoc}
095 */
096 public function destroy($sessionId)
097 {
098 return $this->memcache->delete($this->prefix.$sessionId);
099 }
100
101 /**
102 * {@inheritdoc}
103 */
104 public function gc($maxlifetime)
105 {
106 // not required here because memcache will auto expire the records anyhow.
107 return true;
108 }
109 }
110