Yii2 - Simple example using Event

class TestController extends \yii\web\Controller {

  public function processEventHuyPV($event) {
    $model = $event->sender; #\app\models\HuypvBook (id=1)
    $data = $event->data; #'^^ is optional data'
    
    echo 'Received event ' . $event->name . '. Now will process '. get_class($model).' ID=' .$model->id . ', include data=' . $data . '
';

    # Process model
    # ...
  }

  public function actionEvt() {
  $this->layout = false;
    $model = \app\models\HuypvBook::findOne(1);
    
    # Register event
    $model->on('my_event_name_is_huypv', [$this, 'processEventHuyPV'], '^^ is optional data');
    
    # Do something or do nothing
    for ($i = 0; $i < 10; $i++) {
      #...
    }
    
    # Call to process event
    $model->trigger('my_event_name_is_huypv');
    
    # Do something else
    for ($i = 0; $i < 10; $i++) {
      #....
    }
    
    return 'Done';
  }

}