Source code for file /joomla/cache/storage/apc.php
Documentation is available at apc.php
* @version $Id: apc.php 9764 2007-12-30 07:48:11Z ircmaxell $
* @package Joomla.Framework
* @copyright Copyright (C) 2005 - 2008 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
* APC cache storage handler
* @author Louis Landry <louis.landry@joomla.org>
* @package Joomla.Framework
* @param array $options optional parameters
$this->_hash =
$config->getValue('config.secret');
* Get cached data from APC by id and group
* @param string $id The cache data id
* @param string $group The cache data group
* @param boolean $checkTime True to verify cache time expiration threshold
* @return mixed Boolean false on failure or a cached data string
function get($id, $group, $checkTime)
$cache_id =
$this->_getCacheId($id, $group);
$this->_setExpire($cache_id);
return apc_fetch($cache_id);
* Store the data to APC by id and group
* @param string $id The cache data id
* @param string $group The cache data group
* @param string $data The data to store in cache
* @return boolean True on success, false otherwise
function store($id, $group, $data)
$cache_id =
$this->_getCacheId($id, $group);
apc_store($cache_id.
'_expire', time());
return apc_store($cache_id, $data, $this->_lifetime);
* Remove a cached data entry by id and group
* @param string $id The cache data id
* @param string $group The cache data group
* @return boolean True on success, false otherwise
$cache_id =
$this->_getCacheId($id, $group);
apc_delete($cache_id.
'_expire');
return apc_delete($cache_id);
* Clean cache for a group given a mode.
* group mode : cleans all cache in the group
* notgroup mode : cleans all cache not in the group
* @param string $group The cache data group
* @param string $mode The mode for cleaning cache [group|notgroup]
* @return boolean True on success, false otherwise
function clean($group, $mode)
* Test to see if the cache storage is available.
* @return boolean True on success, false otherwise.
* Set expire time on each call since memcache sets it on cache creation.
* @param string $key Cache key to expire.
* @param integer $lifetime Lifetime of the data in seconds.
function _setExpire($key)
$lifetime =
$this->_lifetime;
$expire =
apc_fetch($key.
'_expire');
if ($expire +
$lifetime <
time()) {
apc_delete($key.
'_expire');
apc_store($key.
'_expire', time());
* Get a cache_id string from an id/group pair
* @param string $id The cache data id
* @param string $group The cache data group
* @return string The cache_id string
function _getCacheId($id, $group)
$name =
md5($this->_application.
'-'.
$id.
'-'.
$this->_hash.
'-'.
$this->_language);
return 'cache_'.
$group.
'-'.
$name;