php 解决致命错误：在 Facebook 身份验证期间调用未定义的方法 Facebook::getSession()

resolving Fatal error: Call to undefined method Facebook::getSession() during facebook authentication

提问by methuselah

i am currently working on facebook connect login page for my web page.

我目前正在为我的网页处理 facebook 连接登录页面。

but i keep receiving 'call to undefined method' error message at line 24:

但我一直在第 24 行收到“调用未定义方法”错误消息：

$session = $facebook->getSession();

when i remove line 24 everything seems to run smoothly .

当我删除第 24 行时，一切似乎都运行顺利。

ut as i am following a tutorial at http://www.9lessons.info/2011/01/facebook-graph-api-connect-with-php-and.htmland http://net.tutsplus.com/tutorials/php/how-to-authenticate-your-users-with-facebook-connect/- its kinda left me stumped!

ut 因为我正在学习http://www.9lessons.info/2011/01/facebook-graph-api-connect-with-php-and.html和http://net.tutsplus.com/tutorials/ 上的教程php/how-to-authenticate-your-users-with-facebook-connect/- 它有点让我难住了！

the error message is

错误信息是

Fatal error: Call to undefined method Facebook::getSession() in C:\xampp\htdocs\kite\index.php on line 24 

please help. many thanks in advance. here is my code:

请帮忙。提前谢谢了。这是我的代码：

<?php session_start();

    //config
    include "resources/Connections/kite.php";

    //connect to the database so we can check, edit, or insert data to our users table
    $con = mysql_connect($hostname_kite, $username_kite, $password_kite) or die(mysql_error());
    $db = mysql_select_db($database_kite, $con) or die(mysql_error());

    //include out functions file giving us access to the protect() function made earlier
    include "resources/php/functions.php";

    //setup facebook connect
    require 'resources/facebook/src/facebook.php';
    $facebook = new Facebook(array(
      'appId'  => $appid_kite,
      'secret' => $secret_kite,
    ));

    // Get User ID
    $user = $facebook->getUser();

    // Let's see if we have an active session
    $session = $facebook->getSession();

    // We may or may not have this data based on whether the user is logged in.
    //
    // If we have a $user id here, it means we know the user is logged into
    // Facebook, but we don't know if the access token is valid. An access
    // token is invalid if the user logged out of Facebook.

    if ($user) {
      try {
        // Proceed knowing you have a logged in user who's authenticated.
        $user_profile = $facebook->api('/me');
      } catch (FacebookApiException $e) {
        error_log($e);
        $user = null;
      }
    }// Login or logout url will be needed depending on current user state.
    if ($user) {
      $logoutUrl = $facebook->getLogoutUrl();
    } else {
      $loginUrl = $facebook->getLoginUrl();
    }
    ob_start();
    ?>

回答by Igor Parra

This is an old question but for the record:

这是一个老问题，但为了记录：

For a fast solution replace all references to getSession()with getUser()

对于一个快速的解决方案替换所有引用getSession()与 getUser()

Example:

例子：

$session = $facebook->getSession();

it should say:

它应该说：

$session = $facebook->getUser();

ref: Upgrade to PHP SDK v3.0.0

参考：升级到 PHP SDK v3.0.0

回答by Rahul

Also, if you dont wish to edit your code, you might wish to revert to a 2.x sdk.

此外，如果您不想编辑代码，您可能希望恢复到 2.x sdk。

https://github.com/facebook/php-sdk/zipball/v2.1.2

https://github.com/facebook/php-sdk/zipball/v2.1.2