首先引入文件：use think\Db;

 1 public function zhuce(){
 2                $username = input("username");//手机号
 3                $password = input("password");//密码
 4                $rpassword = input("rpassword");//确定密码
 5                $invitecode = input("invitecode");//邀请码
 6                if($password==$rpassword){
 7                     $user = Db::table(‘user‘);
 8                     $list =[‘username‘=>"$username",‘password‘=>"$password",‘invitecode‘=>"$invitecode"];//接收数据 
 9                     $use = $user->insert($list);//返回值成功返回1
10                     $this->success("注册成功","{:url(‘index/index/commercial‘)}");//调回登录页面
11                } else {
12                    $this->success("注册失败,两次输入的密码不同！");
13                }
14            }