PHP开发APP传code授权登入

   /**
     * 获取微信用户信息
     */
    public function getWechatInfoByAPP($code)
    {
        if (!$code) returnMsg(501);
        $app_id = ''; // 开放平台APP的id
        $app_secret = ''; // 开放平台APP的secret
        $url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid={$app_id}&secret={$app_secret}&code={$code}&grant_type=authorization_code";
        $data = $this->curl_get($url);
//{
//  "access_token": "ACCESS_TOKEN",
//  "expires_in": 7200,
//  "refresh_token": "REFRESH_TOKEN",
//  "openid": "OPENID",
//  "scope": "SCOPE",
//  "unionid": "o6_bmasdf6_2sgVt7hZDFPfL"
//}
        if ($data['code'] != 200 || !isset($data['data'])) {
            return ['code' => "500", 'msg' => "登录错误" . $data['errmsg']];
        }
        $data = $data['data'];
        if (isset($data['errcode']) && $data['errcode']) {
            return ['code' => "502", 'msg' => "code错误," . $data['errmsg']];
        }
        // 请求用户信息
        $info_url = "https://api.weixin.qq.com/sns/userinfo?access_token={$data['access_token']}&openid={$data['openid']}";
        $user_info = $this->curl_get($info_url);
        if ($user_info['code'] != 200 || !isset($user_info['data'])) {
            return ['code' => "500", 'msg' => "登录错误" . $user_info['errmsg']];
        }
        $data = $user_info['data'];
        if (!isset($data['openid']) || !isset($data['nickname']) || !isset($data['headimgurl'])) {
            return ['code' => "500", 'msg' => "APP登录失败,网络繁忙"];
        }
        return ['code' => 200, 'data' => $data];
    }

// API
    public function appLogin() {
        $code = $_POST['code'];
        $user_wechat_info = $this->getWechatInfoByAPP($code);
        print_r($user_wechat_info);
    }

// curl get请求
    public function curl_get($url) {
        $header = [
            'Accept: application/json',
        ];
        $curl = curl_init();
        // 设置抓取的url
        curl_setopt($curl, CURLOPT_URL, $url);
        // 设置头文件的信息作为数据流输出
        curl_setopt($curl, CURLOPT_HEADER, false);
        // 超时设置,以秒为单位
        curl_setopt($curl, CURLOPT_TIMEOUT, 1);

        // 超时设置，以毫秒为单位
        // curl_setopt($curl, CURLOPT_TIMEOUT_MS, 500);

        // 设置请求头
        curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
        // 设置获取的信息以文件流的形式返回，而不是直接输出。
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
        // 执行命令
        $data = curl_exec($curl);
        $error = curl_error($curl);
        curl_close($curl);

        // 显示错误信息
        if ($error) {
            return ['code' => 500, 'msg' => $error];
        } else {
            return ['code' => 200, 'msg' => 'success', 'data' => json_decode($data, true)];
        }
    }