myblog-1/Application/Admin/Controller/BaseController.class.php

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2019/5/29 0029
 * Time: 10:06
 */

namespace Admin\Controller;
use Think\Controller;
class BaseController extends Controller{
    public function _initialize(){

        if (!$_SESSION['id']){
            $this->redirect('Login/index');
        }else{

        }
    }

}