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<?php
/*
* This file is part of the Predis package.
*
* (c) Daniele Alessandri <suppakilla@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Predis\Session;
use Predis\ClientInterface;
/**
* Session handler class that relies on Predis\Client to store PHP's sessions
* data into one or multiple Redis servers.
*
* This class is mostly intended for PHP 5.4 but it can be used under PHP 5.3
* provided that a polyfill for `SessionHandlerInterface` is defined by either
* you or an external package such as `symfony/http-foundation`.
*
* @author Daniele Alessandri <suppakilla@gmail.com>
*/
class Handler implements \SessionHandlerInterface
{
protected $client;
protected $ttl;
/**
* @param ClientInterface $client Fully initialized client instance.
* @param array $options Session handler options.
*/
public function __construct(ClientInterface $client, array $options = array())
{
$this->client = $client;
if (isset($options['gc_maxlifetime'])) {
$this->ttl = (int) $options['gc_maxlifetime'];
} else {
$this->ttl = ini_get('session.gc_maxlifetime');
}
}
/**
* Registers this instance as the current session handler.
*/
public function register()
{
if (PHP_VERSION_ID >= 50400) {
session_set_save_handler($this, true);
} else {
session_set_save_handler(
array($this, 'open'),
array($this, 'close'),
array($this, 'read'),
array($this, 'write'),
array($this, 'destroy'),
array($this, 'gc')
);
}
}
/**
* {@inheritdoc}
*/
public function open($save_path, $session_id)
{
// NOOP
return true;
}
/**
* {@inheritdoc}
*/
public function close()
{
// NOOP
return true;
}
/**
* {@inheritdoc}
*/
public function gc($maxlifetime)
{
// NOOP
return true;
}
/**
* {@inheritdoc}
*/
public function read($session_id)
{
if ($data = $this->client->get($session_id)) {
return $data;
}
return '';
}
/**
* {@inheritdoc}
*/
public function write($session_id, $session_data)
{
$this->client->setex($session_id, $this->ttl, $session_data);
return true;
}
/**
* {@inheritdoc}
*/
public function destroy($session_id)
{
$this->client->del($session_id);
return true;
}
/**
* Returns the underlying client instance.
*
* @return ClientInterface
*/
public function getClient()
{
return $this->client;
}
/**
* Returns the session max lifetime value.
*
* @return int
*/
public function getMaxLifeTime()
{
return $this->ttl;
}
}