ytapi/application/admin/controller/Index.php

<?php
namespace app\admin\controller;
use think\Controller;
use think\Session;
use think\Db;
use think\Request;
class Index extends Controller
{
	 protected function _initialize()
    {
    	if(!session('?admin')){
    		$this->redirect('login/index');
    	}

    }




    public function index()
    {
        $session=session('admin');
     
        $this->assign('account', $session['username']);

        return $this->fetch();
       
    }


}