小程序服务端，session存用户ID

1.小程序端登录时存session

wx.login({
      success: function(res) {
        var code = res.code;
        //服务器端微信登录
        wx.request({
          url: that.globalData.shopServerUrl + '/users/add',
          header: {
            'Content-Type': 'application/x-www-form-urlencoded',
          },
          method: 'POST',
          data: {
            code: code,
            first_leader: first_leader
          },
          success: function(reslogin) {
            console.log(reslogin);
            if (reslogin.statusCode == 200) {
              wx.setStorageSync('shopSessionId', 'shop_ecsid=' + reslogin.data.session_id)  //如果本地没有就说明第一次请求 
            } else {
              return false;
            }
          },
        })
      }
    });

2.后台判断session中的user_id是否存在

    public function __construct(Request $request = null)
    {
        parent::__construct($request);
        $this->login = new Login();
        $this->usersmodel = new UsersModel();
        $this->userservice = new UserService();
        $shop_ecsid = param($_COOKIE,'hdsj_ecsid');
        if ($shop_ecsid  &&  $shop_ecsid != 'undefined'){
            cookie('PHPSESSID',$shop_ecsid);
        }
        if (!in_array(request()->action(),array_map('strtolower',$this->noVerificationLogin()))){
            if (!$this->login->VerificationLogin()){
                throw new JsonErrorException('请先登录！',401);
            };
            $this->user_id = session('user_id');
        }
    }

//登录  路由  /users/add
public function wxAutoLogin()
 {
        if (!$user_id){
            $user_id = $this->userservice->saveUserInfo($user_info);
        }else{
            $this->usersmodel->isUpdate(true)->save(array('last_login'=>time()),array('user_id'=>$user_id));
        }
        session('user_id',$user_id);
        $result['session_id'] = session_id();
        $result['user_id'] = session('user_id');
        return json($result);
}