php - yii2 中的 afterAction 和返回方法？

Question

我在具有方法测试的公共(public)文件夹中有 Controller

  public function actionTest() {
    $s = "sdfs";
    return $s;
}

并为此操作设置 afterAction，例如:

   public function afterAction($action) {
    if ($action->id == "test") { 
       echo 'here afterActioin';
     }
   }

然后我从另一个 Controller 调用测试操作:

public function actionTest3() {
  echo Yii::$app->runAction('travia/test');
 }

问题是当我在浏览器中调用 test3 时没有任何显示，但是如果我评论 afterAction 该方法将返回。问题出在哪里，不允许我的操作返回某些内容的 afterAction 的行为是什么？

Answer 1

Yii2 文档

This method is invoked right after an action is executed. The method will trigger the EVENT_AFTER_ACTION event. The return value of the method will be used as the action return value. If you override this method, your code should look like the following:

public function afterAction($action, $result)
{
    $result = parent::afterAction($action, $result);
    // your custom code here
    return $result;
}