菜单的添加功能

<?php
/**
 * 菜单列表
 */

namespace app\admins\controller;
use app\admins\controller\Base;
use think\Db;

class Menu extends Base
{
     public function index()
     {
         //获取数据
         $data = Db::table('admins_menu')->order('ord asc')->select();
         $this->view->lists = $data;
         return $this->fetch();
     }
     public function add()
     {
       return $this->fetch();
     }
     public function save()
     {
         $data['title'] = trim(input('post.title'));
         $data['controller'] = trim(input('post.controller'));
         $data['method'] = trim(input('post.method'));
         $data['ord'] = (int)input('post.ord');
         $data['ishidden'] = (int)input('post.ishidden');
         $data['status'] = (int)input('post.status');
         if($data['title'] == ''){
             exit(json_encode(array('code'=>1,'msg'=>'菜单名不能为空')));
         }
         if($data['controller'] == ''){
             exit(json_encode(array('code'=>1,'msg'=>'控制器不能为空')));
         }
         if($data['method'] == ''){
             exit(json_encode(array('code'=>1,'msg'=>'方法不能为空')));
         }
         $res = Db::table('admins_menu')->insert($data);
         if(!$res){
             exit(json_encode(array('code'=>1,'msg'=>'添加失败')));
         }else{
             exit(json_encode(array('code'=>0,'msg'=>'添加成功')));
         }
     }
}