以下是最近获取用户信息的返回值，除了["openid"]、["nickname"]、["headimgurl"]、["unionid"]这些都有，其他都返回空字串，是怎么回事呢？

P.S.之前是都有的

调用接口如下：
https://api.weixin.qq.com/sns/userinfo?access_token="xxxxxxxxxxxxx"&openid="xxxxxxxxxxxxx"&lang=zh_CN


object(stdClass)#1 (10) {
  ["openid"]=>
  string(28) "XXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
  ["nickname"]=>
  string(5) "XXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
  ["sex"]=>
  int(0)
  ["language"]=>
  string(0) ""
  ["city"]=>
  string(0) ""
  ["province"]=>
  string(0) ""
  ["country"]=>
  string(0) ""
  ["headimgurl"]=>
  string(131) "XXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
  ["privilege"]=>
  array(0) {
  }
  ["unionid"]=>
  string(28) "XXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
}