夺命雷公狗TP3.2.3商城9-----后台退出

<?php
namespace Admin\Controller;
use Think\Controller;
class LoginController extends Controller {
    //后台登录
    public function index(){
        if(IS_POST){
            $username = I(‘admin‘);
            $password = I(‘pwd‘);
            if(D(‘admin‘)->checkUser($username,$password)){
                //dump($_SESSION);die;
                $this -> success(‘登录成功‘,U(‘index/index‘));
            }else{
                $this -> error(‘用户名或则密码错误‘);
            }
            return;
        }
        $this -> display();
    }

    //注销
    public function logout(){
        session(null);
        $this -> success(‘恭喜成功退出‘,‘index‘,3);
        //dump($_SESSION);
    }
}