基于TP5当执行错误的URL时控制器跳转（代码）

/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2018/1/10
 * Time: 13:15
*/
namespace app\admin\controller;

class Error extends Base
{
    //控制器错误时候-默认方法
    public function index()
    {
        return $this->show();
    }

    //控制器错误时候-错误方法
    public function _empty()
    {
        return $this->show();
    }

    public function show()
    {
        return $this->fetch('error/show');
    }
}/**
 * Created by PhpStorm.
 * User: Administra