使用PHP-SDK的Facebook身份验证 [英] Facebook Authentication using PHP-SDK

问题描述

我已经尝试了好几天没有运气了，我设法使用了PHP-SDK附带的example.php，并且运行良好.我只需要存储返回的会话并在以后使用它，这样我就可以访问而无需重新验证.

I've been trying for couple days now without luck, I managed to use the example.php that comes with PHP-SDK and worked perfectly. I just need to store the returned session and use it later on so I could access without re-authenticating.

我尝试将会话存储在数据库的序列化字段中，然后还原数据，将其反序列化，并使用php-sdk中的setSession函数检索身份验证.不幸的是，这没用，

I tried storing the sessions in a serialized field in a database and then, restoring the data, unserializing it and using setSession function in the php-sdk to retrieve the authentication. Unfortunately, that did not work,

这里是带有代码示例的上一个问题的链接.

Here is a link to a previous question with the code samples..

Facebook OAuth基于存储的会话检索信息

请指教?

推荐答案

更新:

Update: Offline Access in now deprecated. Use something else instead.

---

If you want to use the access token of the user even after he has logged out of your app, you have to ask for the offline_access permission.

使用Facebook PHP SDK v3(请参阅github )，它非常简单.要记录具有offline_access权限的用户，请在生成登录URL时询问.这是您的操作方式.

With the Facebook PHP SDK v3 (see on github), it is pretty simple. To log someone with the offline_access permission, you ask it when your generate the login URL. Here is how you do that.

首先，您检查用户是否登录:

First you check if the user is logged in or not :

require "facebook.php";
$facebook = new Facebook(array(
    'appId'  => YOUR_APP_ID,
    'secret' => YOUR_APP_SECRET,
));

$user = $facebook->getUser();

if ($user) {
  try {
    $user_profile = $facebook->api('/me');
  } catch (FacebookApiException $e) {
    $user = null;
  }
}

如果他不是，则生成使用Facebook登录" URL，要求获得offline_access权限:

If he is not, you generate the "Login with Facebook" URL asking for the offline_access permission :

if (!$user) {
    $args['scope'] = 'offline_access';
    $loginUrl = $facebook->getLoginUrl($args);
}

然后在模板中显示链接:

And then display the link in your template :

<?php if (!$user): ?>
    <a href="<?php echo $loginUrl ?>">Login with Facebook</a>
<?php endif ?>

然后，您可以检索脱机访问令牌并进行存储.要获取它，请致电:

Then you can retrieve the offline access token and store it. To get it, call :

if ($user) {
    $token = $facebook->getAccessToken();
    // store token
}

使用离线访问令牌

要在用户未登录时使用脱机访问令牌:

Use the offline access token

To use the offline access token when the user is not logged in :

require "facebook.php";
$facebook = new Facebook(array(
    'appId'  => YOUR_APP_ID,
    'secret' => YOUR_APP_SECRET,
));

$facebook->setAccessToken("...");

现在您可以为此用户进行API调用:

And now you can make API calls for this user :

$user_profile = $facebook->api('/me');

希望有帮助！

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