Error reported after inheriting Controller class

Question

<?php

namespace app\admins\controller;

use think\Controller;

use Util\data\Sysdb;

class Test extends Controller

{

public function index(){

$this->db = new Sysdb ;

$res = $this->db->table('admins')->field('id,username')->lists();

dump ($res);

}

}

will show that the web page cannot operate. If you remove the extends Controller, this error will not be reported

Answer 1

Are you tp6 or 5? tp6 inherits BaseController

Answer 2

I reported this error, and I have turned on the debug mode

Answer 3

What error will be reported? Let’s take a look at the screenshots