class TestController extends Controller

{

    const EVENT_MY_EVENT = 'myEvent';

    public function actionTest()

    {

        echo 'this is  test action<br>';

        $myEvent = new MyEvent();

        $this->on(self::EVENT_MY_EVENT, ['app\modules\api\event\MyEvent', 'fooEvent']);  //绑定事件

        $this->trigger(self::EVENT_MY_EVENT, $myEvent);   //触发

    }

}

//事件类

class MyEvent extends Event

{

    public function fooEvent()

    {

        echo 'this is my first event instance.<br>';

    }

}