Viewing file:  Cache.php (3.02 KB) -rw-rw-rw-
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<?php
/**
* W3 Cache class
*/
/**
* W3 Cache engine types
*/
define('W3TC_CACHE_MEMCACHED', 'memcached');
define('W3TC_CACHE_APC', 'apc');
define('W3TC_CACHE_EACCELERATOR', 'eaccelerator');
define('W3TC_CACHE_XCACHE', 'xcache');
define('W3TC_CACHE_WINCACHE', 'wincache');
define('W3TC_CACHE_FILE', 'file');
define('W3TC_CACHE_FILE_GENERIC', 'file_generic');
/**
* Class W3_Cache
*/
class W3_Cache {
/**
* Returns cache engine instance
*
* @param string $engine
* @param array $config
* @return W3_Cache_Base
*/
static function instance($engine, $config = array()) {
static $instances = array();
// common configuration data
if (!isset($config['blog_id']))
$config['blog_id'] = w3_get_blog_id();
$instance_key = sprintf('%s_%s', $engine, md5(serialize($config)));
if (!isset($instances[$instance_key])) {
switch ($engine) {
case W3TC_CACHE_MEMCACHED:
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/Memcached.php');
$instances[$instance_key] = new W3_Cache_Memcached($config);
break;
case W3TC_CACHE_APC:
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/Apc.php');
$instances[$instance_key] = new W3_Cache_Apc($config);
break;
case W3TC_CACHE_EACCELERATOR:
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/Eaccelerator.php');
$instances[$instance_key] = new W3_Cache_Eaccelerator($config);
break;
case W3TC_CACHE_XCACHE:
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/Xcache.php');
$instances[$instance_key] = new W3_Cache_Xcache($config);
break;
case W3TC_CACHE_WINCACHE:
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/Wincache.php');
$instances[$instance_key] = new W3_Cache_Wincache($config);
break;
case W3TC_CACHE_FILE:
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/File.php');
$instances[$instance_key] = new W3_Cache_File($config);
break;
case W3TC_CACHE_FILE_GENERIC:
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/File/Generic.php');
$instances[$instance_key] = new W3_Cache_File_Generic($config);
break;
default:
trigger_error('Incorrect cache engine', E_USER_WARNING);
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/Base.php');
$instances[$instance_key] = new W3_Cache_Base($config);
break;
}
if (!$instances[$instance_key]->available()) {
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/Base.php');
$instances[$instance_key] = new W3_Cache_Base($config);
}
}
return $instances[$instance_key];
}
}
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