tingwu/app/controller/Demo.php

<?php
/**
 * Created by PhpStorm.
 * User: 97
 */
namespace app\controller;

use app\BaseController;

class Demo extends BaseController{

     public function show(){
         return 'this is app demo';
     }

     public function showjson(){
         $result = [
             "status" => 1,
             "message" => "OK",
             "result" => [
                 'id' => 1,
             ]
         ];

         return json($result);
     }

     public function request(){
         dump($this->request->param('aa',1,"intval"));
     }



}