class mem { public $memcache=null; public $array=array(); public function __construct() { $this->memcache = new Memcache; $this->memcache->connect('localhost', 11211) or die ("Could not connect"); } public function add($parent="",$key="",$value="") { $this->array[$key]=$value; $this->memcache->set($parent,$this->array,false,500); } public function deleteGroup($key=null) { $this->memcache->delete($key); } public function get($key=null) { return $this->memcache->get($key); } } $mem=new mem(); $mem->add("cacheGroup","cacheName1","1"); $mem->add("cacheGroup","cacheName2","2"); $mem->add("cacheGroup","cacheName3","3"); //$mem->deleteGroup("cacheGroup"); var_Dump($mem->get('cacheGroup'));