if (function_exists('apc_clear_cache')) { apc_clear_cache(); apc_clear_cache('user'); apc_clear_cache('opcode'); }
$cache = new Memcached(); $cache->addServer('localhost', 11211); $cache->flush();
$frontendOptions = array( 'lifetime' => 7200, 'automatic_serialization' => true ); $backendOptions = array( 'cache_dir' => './tmp/' ); $cache = Zend_Cache::factory('Core', 'File', $frontendOptions, $backendOptions); $cache->clean();In this example, we are using the Zend Cache library to clear the cache memory. We create a cache object using the `factory()` method of the `Zend_Cache` class, and then call the `clean()` method to clear the cache. Package Library: The examples above are using different cache libraries such as APC, Memcached, and Zend Cache. These libraries are not part of the standard PHP library but are widely used in PHP development.