public static function GetInstance()
{
if (!self::$instance) {
self::$instance = new Predis_Client(array('host' => REDIS_HOST, 'port' => REDIS_PORT, 'database' => REDIS_DATABASE, 'password' => REDIS_PASSWORD));
if (REDIS_PASSWORD) {
//self::$instance->auth(REDIS_PASSWORD);
}
}
return self::$instance;
}