Current File : /home/admin/domains/happytokorea.com/public_html_bk/libraries/joomla/session/storage/memcache.php
<?php
/**
* @version $Id:eaccelerator.php 6961 2007-03-15 16:06:53Z tcp $
* @package Joomla.Framework
* @subpackage Session
* @copyright Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
* @license GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/
// Check to ensure this file is within the rest of the framework
defined('JPATH_BASE') or die();
/**
* Memcache session storage handler for PHP
*
* -- Inspired in both design and implementation by the Horde memcache handler --
*
* @package Joomla.Framework
* @subpackage Session
* @since 1.5
* @see http://www.php.net/manual/en/function.session-set-save-handler.php
*/
class JSessionStorageMemcache extends JSessionStorage
{
/**
* Resource for the current memcached connection.
*
* @var resource
*/
var $_db;
/**
* Use compression?
*
* @var int
*/
var $_compress = null;
/**
* Use persistent connections
*
* @var boolean
*/
var $_persistent = false;
/**
* Constructor
*
* @access protected
* @param array $options optional parameters
*/
function __construct( $options = array() )
{
if (!$this->test()) {
return JError::raiseError(404, "The memcache extension isn't available");
}
parent::__construct($options);
$config =& JFactory::getConfig();
$params = $config->getValue('config.memcache_settings');
if (!is_array($params))
{
$params = unserialize(stripslashes($params));
}
if (!$params)
{
$params = array();
}
$this->_compress = (isset($params['compression'])) ? $params['compression'] : 0;
$this->_persistent = (isset($params['persistent'])) ? $params['persistent'] : false;
// This will be an array of loveliness
$this->_servers = (isset($params['servers'])) ? $params['servers'] : array();
}
/**
* Open the SessionHandler backend.
*
* @access public
* @param string $save_path The path to the session object.
* @param string $session_name The name of the session.
* @return boolean True on success, false otherwise.
*/
function open($save_path, $session_name)
{
$this->_db = new Memcache;
for ($i=0, $n=count($this->_servers); $i < $n; $i++)
{
$server = $this->_servers[$i];
$this->_db->addServer($server['host'], $server['port'], $this->_persistent);
}
return true;
}
/**
* Close the SessionHandler backend.
*
* @access public
* @return boolean True on success, false otherwise.
*/
function close()
{
return $this->_db->close();
}
/**
* Read the data for a particular session identifier from the
* SessionHandler backend.
*
* @access public
* @param string $id The session identifier.
* @return string The session data.
*/
function read($id)
{
$sess_id = 'sess_'.$id;
$this->_setExpire($sess_id);
return $this->_db->get($sess_id);
}
/**
* Write session data to the SessionHandler backend.
*
* @access public
* @param string $id The session identifier.
* @param string $session_data The session data.
* @return boolean True on success, false otherwise.
*/
function write($id, $session_data)
{
$sess_id = 'sess_'.$id;
if ($this->_db->get($sess_id.'_expire')) {
$this->_db->replace($sess_id.'_expire', time(), 0);
} else {
$this->_db->set($sess_id.'_expire', time(), 0);
}
if ($this->_db->get($sess_id)) {
$this->_db->replace($sess_id, $session_data, $this->_compress);
} else {
$this->_db->set($sess_id, $session_data, $this->_compress);
}
return;
}
/**
* Destroy the data for a particular session identifier in the
* SessionHandler backend.
*
* @access public
* @param string $id The session identifier.
* @return boolean True on success, false otherwise.
*/
function destroy($id)
{
$sess_id = 'sess_'.$id;
$this->_db->delete($sess_id.'_expire');
return $this->_db->delete($sess_id);
}
/**
* Garbage collect stale sessions from the SessionHandler backend.
*
* -- Not Applicable in memcache --
*
* @access public
* @param integer $maxlifetime The maximum age of a session.
* @return boolean True on success, false otherwise.
*/
function gc($maxlifetime)
{
return true;
}
/**
* Test to see if the SessionHandler is available.
*
* @static
* @access public
* @return boolean True on success, false otherwise.
*/
function test()
{
return (extension_loaded('memcache') && class_exists('Memcache'));
}
/**
* Set expire time on each call since memcache sets it on cache creation.
*
* @access private
*
* @param string $key Cache key to expire.
* @param integer $lifetime Lifetime of the data in seconds.
*/
function _setExpire($key)
{
$lifetime = ini_get("session.gc_maxlifetime");
$expire = $this->_db->get($key.'_expire');
// set prune period
if ($expire + $lifetime < time()) {
$this->_db->delete($key);
$this->_db->delete($key.'_expire');
} else {
$this->_db->replace($key.'_expire', time());
}
}
}