wx.login({

      success: function (res) {

        var code = res.code

        if (code) {

          that.globalData.code = code;

          globalData: {

            code: code

          }

          wx.request({

            url: 'https://www.nidedyuming.com/index.php/index/index/login',

            method: 'POST',

            data: {code: code},

            success: function (res) {

              that.globalData.openid = res.data.openid;

              console.log(res.data.openid);

            }

          })

        }

      }

    })

    function oauth2($code)

    {

        //$code = $_GET['code'];//小程序传来的code值

        $url = 'https://api.weixin.qq.com/sns/jscode2session?appid="你的APPID"&secret="你的app密钥"&js_code=' . $code . '&grant_type=authorization_code';

        //yourAppid为开发者appid.appSecret为开发者的appsecret,都可以从微信公众平台获取；

        $info = file_get_contents($url);//发送HTTPs请求并获取返回的数据，推荐使用curl

        $json = json_decode($info);//对json数据解码

        $arr = get_object_vars($json);

       // dump($arr);die;

        $openid = $arr['openid'];

return $openid;
}