No error is reported but the value cannot be obtained and can only be printed out. Learn
<?php
namespace app\index\controller;
use think\Controller;
class Test1 extends Controller
{
public function index(){
return 'shepi';
}
public function demo3()
{
return '学习'.$this->request->param('lesson');
}
public function demo4()
{
return '学习'.$this->request->get('lesson');
//return '学习'.Request::instance()->param('lesson');
}
}
