--- /dev/null
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpFoundation\Session\Storage\Handler;
+
+/**
+ * MemcachedSessionHandler.
+ *
+ * Memcached based session storage handler based on the Memcached class
+ * provided by the PHP memcached extension.
+ *
+ * @see http://php.net/memcached
+ *
+ * @author Drak <drak@zikula.org>
+ */
+class MemcachedSessionHandler implements \SessionHandlerInterface
+{
+ /**
+ * @var \Memcached Memcached driver
+ */
+ private $memcached;
+
+ /**
+ * @var int Time to live in seconds
+ */
+ private $ttl;
+
+ /**
+ * @var string Key prefix for shared environments
+ */
+ private $prefix;
+
+ /**
+ * Constructor.
+ *
+ * List of available options:
+ * * prefix: The prefix to use for the memcached keys in order to avoid collision
+ * * expiretime: The time to live in seconds
+ *
+ * @param \Memcached $memcached A \Memcached instance
+ * @param array $options An associative array of Memcached options
+ *
+ * @throws \InvalidArgumentException When unsupported options are passed
+ */
+ public function __construct(\Memcached $memcached, array $options = array())
+ {
+ $this->memcached = $memcached;
+
+ if ($diff = array_diff(array_keys($options), array('prefix', 'expiretime'))) {
+ throw new \InvalidArgumentException(sprintf(
+ 'The following options are not supported "%s"', implode(', ', $diff)
+ ));
+ }
+
+ $this->ttl = isset($options['expiretime']) ? (int) $options['expiretime'] : 86400;
+ $this->prefix = isset($options['prefix']) ? $options['prefix'] : 'sf2s';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function open($savePath, $sessionName)
+ {
+ return true;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function close()
+ {
+ return true;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function read($sessionId)
+ {
+ return $this->memcached->get($this->prefix.$sessionId) ?: '';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function write($sessionId, $data)
+ {
+ return $this->memcached->set($this->prefix.$sessionId, $data, time() + $this->ttl);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function destroy($sessionId)
+ {
+ return $this->memcached->delete($this->prefix.$sessionId);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function gc($maxlifetime)
+ {
+ // not required here because memcached will auto expire the records anyhow.
+ return true;
+ }
+
+ /**
+ * Return a Memcached instance.
+ *
+ * @return \Memcached
+ */
+ protected function getMemcached()
+ {
+ return $this->memcached;
+ }
+}