antshop/api/controllers/SiteController.php

<?php

namespace api\controllers;

use yii\web\Controller;

/**
 * Created by PhpStorm.
 * User: iron
 * Date: 2018/5/25
 * Time: 16:42
 */
class SiteController extends Controller
{
    public function actions() {
        return [
            'error' => [
                'class' => 'yii\web\ErrorAction',
            ],
        ];
    }
}