gateway定时器问题

$timer_id = Timer::add(5, function(){echo date('H:i:s',time()).'test begin!';}, array(), true);
$user_timers = Store::instance('gateway')->get('user_timers');
$user_timers[] = $timer_id;
Store::instance('gateway')->set('user_timers',$user_timers);

$user_timers = Store::instance('gateway')->get('user_timers');
        if(!empty($user_timers)){
            foreach($user_timers as $val){
                   Timer::del($val);
            }
            unset($user_timers);
            Store::instance('gateway')->set('user_timers',$user_timers);
        }