Facebook PHP SDK 验证访问令牌时出错

Question

从 thinkdiff.net 教程开始，我使用 facebook 登录/注销链接构建了一个简单的测试页面（本地环境）。如果登录，我想回显 fb 用户 API。

我正在使用最新的facebook PHP SDK (v.2.1.2) 。

它似乎有效，但是当我注销时，我收到此异常：

FacebookApiException Object
(
[result:protected] => Array
    (
        [error] => Array
            (
                [type] => OAuthException
                [message] => Error validating access token: The session is invalid because the user logged out or because auth.expireSession was invoked.
            )

    )

[message:protected] => Error validating access token: The session is invalid because the user logged out or because auth.expireSession was invoked.
[string:Exception:private] => 
[code:protected] => 0
[file:protected] => C:\wamp\www\fb\facebook.php
[line:protected] => 543
[trace:Exception:private] => Array
    (
        [0] => Array
            (
                [function] => _graph
                [class] => Facebook
                [type] => ->
                [args] => Array
                    (
                        [0] => /me
                    )

            )

        [1] => Array
            (
                [file] => C:\wamp\www\fb\facebook.php
                [line] => 492
                [function] => call_user_func_array
                [args] => Array
                    (
                        [0] => Array
                            (
                                [0] => Facebook Object
                                    (
                                        [appId:protected] => 1819654718*****
                                        [apiSecret:protected] => a2fccb8e93638b50c8d6b2**********
                                        [session:protected] => 
                                        [signedRequest:protected] => 
                                        [sessionLoaded:protected] => 1
                                        [cookieSupport:protected] => 1
                                        [baseDomain:protected] => 
                                        [fileUploadSupport:protected] => 
                                    )

                                [1] => _graph
                            )

                        [1] => Array
                            (
                                [0] => /me
                            )

                    )

            )

        [2] => Array
            (
                [file] => C:\wamp\www\fb\fb.php
                [line] => 33
                [function] => api
                [class] => Facebook
                [type] => ->
                [args] => Array
                    (
                        [0] => /me
                    )

            )

    )

[previous:Exception:private] => 
)

这是我的测试页代码

$fbconfig['appid']  = "18196**********";     
$fbconfig['api']  = "5c6910be575e4e688ac6d**********";     
$fbconfig['secret']  = "a2fccb8e93638b50c8d6b2**********"; 

try
{         
   include_once "facebook.php"; 
}     
catch(Exception $o)
{         
 echo '<pre>';         
 print_r($o);         
 echo '</pre>';     
}     
// Create our Application instance.     
$facebook = new Facebook(array('appId'  => $fbconfig['appid'],'secret' =>    $fbconfig['secret'],'cookie' => true));       

$session = $facebook->getSession();       
$fbme = null;     
// Session based graph API call.     
if (!empty($session)) 
{       
  d($session);
  try 
  {         
    $uid = $facebook->getUser();         
    $fbme = $facebook->api('/me');       
  } 
  catch (FacebookApiException $e) 
  {           
    d($e);       
  }    
}      
function d($d)
{         
echo '<pre>';         
print_r($d);         
echo '</pre>';     
} 


if ($fbme) 
{   
  $logoutUrl = $facebook->getLogoutUrl(); 
  echo"<a href='{$logoutUrl}'>logout</a>";
  d($fbme);
} 
else 
{   
  $loginUrl = $facebook->getLoginUrl(array('req_perms' => 'email,read_stream,user_birthday')); 
  echo"<a href='{$loginUrl}'>login</a>";
}

谢谢

卢卡

Answer 1

我会尝试在注销时手动清除 session。 在返回 url 上放置一个 GET 参数，或者使用不同的返回 url，然后执行以下操作：

$facebook->destroySession();

问题是 session cookie 即使在用户注销后仍然存在。 当用户返回您的页面时，您正在尝试使用过期的 session 发出请求。 祝你好运。

Answer 2

很好的答案，您必须先调用 destroySession()

facebook->destroySession();

那么你可以调用 getLoginUrl()