friendica-github/library/Smarty/demo/plugins/cacheresource.apc.php

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<?php
/**
* APC CacheResource
*
* CacheResource Implementation based on the KeyValueStore API to use
* memcache as the storage resource for Smarty's output caching.
* *
* @package CacheResource-examples
* @author Uwe Tews
*/
class Smarty_CacheResource_Apc extends Smarty_CacheResource_KeyValueStore {
public function __construct()
{
// test if APC is present
if(!function_exists('apc_cache_info')) {
throw new Exception('APC Template Caching Error: APC is not installed');
}
}
/**
* Read values for a set of keys from cache
*
* @param array $keys list of keys to fetch
* @return array list of values with the given keys used as indexes
* @return boolean true on success, false on failure
*/
protected function read(array $keys)
{
$_res = array();
$res = apc_fetch($keys);
foreach ($res as $k => $v) {
$_res[$k] = $v;
}
return $_res;
}
/**
* Save values for a set of keys to cache
*
* @param array $keys list of values to save
* @param int $expire expiration time
* @return boolean true on success, false on failure
*/
protected function write(array $keys, $expire=null)
{
foreach ($keys as $k => $v) {
apc_store($k, $v, $expire);
}
return true;
}
/**
* Remove values from cache
*
* @param array $keys list of keys to delete
* @return boolean true on success, false on failure
*/
protected function delete(array $keys)
{
foreach ($keys as $k) {
apc_delete($k);
}
return true;
}
/**
* Remove *all* values from cache
*
* @return boolean true on success, false on failure
*/
protected function purge()
{
return apc_clear_cache('user');
}
}