如何添加 actions

<?php
namespace app\Actions;

use yii\base\Action;

class GzhAppFormatOutput extends Action
{
    public $objectsToFormat;
    public $id;

    public function run()
    {
　　　　return "Hello world!";
    }
}

 在调用时:

    public function actions()
    {
        return [
            'about' => [
                'class' => 'app\actions\GzhAppFormatOutput',//此处要注意actions一定是GzhAppFormatOutput.php所在的文件夹

                'objectsToFormat' => 'abc',

                'id' => '123',],];
    }