MemcacheSessionHandler.php
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<?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;
/**
* MemcacheSessionHandler.
*
* @author Drak <drak@zikula.org>
*/
class MemcacheSessionHandler implements \SessionHandlerInterface
{
/**
* @var \Memcache Memcache driver
*/
private $memcache;
/**
* @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 memcache keys in order to avoid collision
* * expiretime: The time to live in seconds
*
* @param \Memcache $memcache A \Memcache instance
* @param array $options An associative array of Memcache options
*
* @throws \InvalidArgumentException When unsupported options are passed
*/
public function __construct(\Memcache $memcache, array $options = array())
{
if ($diff = array_diff(array_keys($options), array('prefix', 'expiretime'))) {
throw new \InvalidArgumentException(sprintf(
'The following options are not supported "%s"', implode(', ', $diff)
));
}
$this->memcache = $memcache;
$this->ttl = isset($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 $this->memcache->close();
}
/**
* {@inheritdoc}
*/
public function read($sessionId)
{
return $this->memcache->get($this->prefix.$sessionId) ?: '';
}
/**
* {@inheritdoc}
*/
public function write($sessionId, $data)
{
return $this->memcache->set($this->prefix.$sessionId, $data, 0, time() + $this->ttl);
}
/**
* {@inheritdoc}
*/
public function destroy($sessionId)
{
return $this->memcache->delete($this->prefix.$sessionId);
}
/**
* {@inheritdoc}
*/
public function gc($maxlifetime)
{
// not required here because memcache will auto expire the records anyhow.
return true;
}
/**
* Return a Memcache instance.
*
* @return \Memcache
*/
protected function getMemcache()
{
return $this->memcache;
}
}