/
Cache.php
executable file
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/
Cache.php
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<?php
namespace W3TC;
/**
* W3 Cache class
*/
/**
* class Cache
*/
class 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'] = Util_Environment::blog_id();
$instance_key = sprintf( '%s_%s', $engine, md5( serialize( $config ) ) );
if ( !isset( $instances[$instance_key] ) ) {
switch ( $engine ) {
case 'apc':
if ( function_exists( 'apcu_store' ) )
$instances[$instance_key] = new Cache_Apcu( $config );
else if ( function_exists( 'apc_store' ) )
$instances[$instance_key] = new Cache_Apc( $config );
break;
case 'eaccelerator':
$instances[$instance_key] = new Cache_Eaccelerator( $config );
break;
case 'file':
$instances[$instance_key] = new Cache_File( $config );
break;
case 'file_generic':
$instances[$instance_key] = new Cache_File_Generic( $config );
break;
case 'memcached':
if ( class_exists( '\Memcached' ) ) {
$instances[$instance_key] = new Cache_Memcached( $config );
} else if ( class_exists( '\Memcache' ) ) {
$instances[$instance_key] = new Cache_Memcache( $config );
}
break;
case 'redis':
$instances[$instance_key] = new Cache_Redis( $config );
break;
case 'wincache':
$instances[$instance_key] = new Cache_Wincache( $config );
break;
case 'xcache':
$instances[$instance_key] = new Cache_Xcache( $config );
break;
default:
trigger_error( 'Incorrect cache engine ' . $engine, E_USER_WARNING );
$instances[$instance_key] = new Cache_Base( $config );
break;
}
if ( !isset( $instances[$instance_key] ) ||
!$instances[$instance_key]->available() ) {
$instances[$instance_key] = new Cache_Base( $config );
}
}
return $instances[$instance_key];
}
/**
* Returns caching engine name
*
* @param unknown $engine
* @param unknown $module
*
* @return string
*/
static public function engine_name( $engine, $module = '' ) {
switch ( $engine ) {
case 'memcached':
if ( class_exists( 'Memcached' ) )
$engine_name = 'memcached';
else
$engine_name = 'memcache';
break;
case 'apc':
$engine_name = 'apc';
break;
case 'eaccelerator':
$engine_name = 'eaccelerator';
break;
case 'redis':
$engine_name = 'redis';
break;
case 'xcache':
$engine_name = 'xcache';
break;
case 'wincache':
$engine_name = 'wincache';
break;
case 'file':
if ( $module == 'pgcache' )
$engine_name = 'disk: basic';
else
$engine_name = 'disk';
break;
case 'file_generic':
$engine_name = 'disk: enhanced';
break;
case 'ftp':
$engine_name = 'self-hosted / file transfer protocol upload';
break;
case 's3':
$engine_name = 'amazon simple storage service (s3)';
break;
case 'cf':
$engine_name = 'amazon cloudfront';
break;
case 'google_drive':
$engine_name = 'google drive';
break;
case 'highwinds':
$engine_name = 'highwinds';
break;
case 'cf2':
$engine_name = 'amazon cloudfront';
break;
case 'rscf':
$engine_name = 'rackspace cloud files';
break;
case 'azure':
$engine_name = 'microsoft azure storage';
break;
case 'mirror':
$engine_name = 'mirror';
break;
case 'netdna':
$engine_name = 'netdna';
break;
case 'maxcdn':
$engine_name = 'maxcdn';
break;
case 'cotendo':
$engine_name = 'cotendo';
break;
case 'akamai':
$engine_name = 'akamai';
break;
case 'edgecast':
$engine_name = 'media template procdn / edgecast';
break;
case 'att':
$engine_name = 'at&t';
break;
default:
$engine_name = 'n/a';
break;
}
return $engine_name;
}
}