public function getCachedString($_key, $_isArray = true)
 {
     $_cache = false;
     $_obj = new Memcache();
     $_cacheConnected = $_obj->get('memcacheconnected');
     if ($_cacheConnected) {
         if ($_isArray) {
             $_cache = unserialize($_obj->cacheGet($_key));
         } else {
             $_cache = $_obj->cacheGet($_key);
         }
     }
     unset($_obj);
     return $_cache;
 }