facebook-> getUser（）返回0 [英] facebook->getUser() returns 0

问题描述

我认为这是因为用户必须向我的Facebook应用程序授予某种访问权限，以获得getUser可用于我？这是我的代码：

I assume that this is because users have to grant some sort of access to my facebook application, for getUser to be available to me? Here is my code:

 <? require 'facebook.php'; ?>
 <?php

 $facebook = new Facebook(array(
 'appId' => '[//fb app id]',
 'secret' => '[//fb app secret]',
 'cookie' => true
 ));

 $uid = $facebook->getUser();
 echo $uid;

 ?>

所以我猜我的问题是，没有提示用户给我的应用许可，是不是任何其他类型的唯一标识符，我可以从fb用户抓取，以防止他们提交超过1条目到我的应用程序。我有用户的添加提交，但我只想允许每个用户1提交。感谢您的帮助！

So I guess my question is, short of prompting the user to give permission to my app, is there any other sort of unique identifier that I can grab from a fb user to prevent them from submitting more than 1 entry to my app. I have user's add submissions, but I only want to allow 1 submission per user. Thanks for the help!

推荐答案

要获取用户ID，用户必须授予权限

To get user id, user have to grant permission

if($uid){
  try {
    // Proceed knowing you have a logged in user who's authenticated.
    $user_profile = $facebook->api('/me');

  } catch (FacebookApiException $e) {
    error_log($e);
    $user = null;
  }
}else{
    $loginUrl = $facebook->getLoginUrl();
    echo("<br>login url=".$loginUrl);
};

在用户授予权限（请参阅loginUrl）后，您可以访问用户ID

After the user grant permission (see the loginUrl), you may access user id

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