Question

After authenticating a user and posting to their wall, it gives the user a choice to logout or continue back to the homepage logged in. If they logout and try to log back in, I get this error.

Fatal error: Uncaught OAuthException: An active access token must be used to query
information about the current user. thrown in ...

If they stay logged in they are fine.

After logging out the script using FB.logout from the jdk it is setting the $_SESSION[‘active’][$access_token] to null, so when I come to connect page again from the facebook login, I get a above for-mentioned error. However the script is not clearing out the userdata

$user = $facebook->getUser(); returns the previous userID, which I assume is part of my problem.

Here is the code

<?php
//include the Facebook PHP SDK
include_once 'facebook.php';

//instantiate the Facebook library with the APP ID and APP SECRET
$facebook = new Facebook(array(
    'appId' => '162628977190080',
    'secret' => '**MADE PRIVATE**',
    'cookie' => true
));

//Get the FB UID of the currently logged in user
$user = $facebook->getUser();




//if the user has already allowed the application, you'll be able to get his/her FB UID
if($user) {

    //start the session if needed
    if( session_id() ) {

    } else {
        session_start();
    }

    //do stuff when already logged in

    //get the user's access token
    $access_token = $facebook->getAccessToken();
    //check permissions list
    $permissions_list = $facebook->api(
        '/me/permissions',
        'GET',
        array(
            'access_token' => $access_token
        )
    );

    //check if the permissions we need have been allowed by the user
    //if not then redirect them again to facebook's permissions page
    $permissions_needed = array('publish_stream', 'email');
    foreach($permissions_needed as $perm) {
        if( !isset($permissions_list['data'][0][$perm]) || $permissions_list['data'][0][$perm] != 1 ) {
            $login_url_params = array(
                'scope' => 'publish_stream,email',
                'fbconnect' =>  1,
                'display'   =>  "page",
                'next' => 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']
            );
            $login_url = $facebook->getLoginUrl($login_url_params);
            header("Location: {$login_url}");
            exit();
        }
    }

    //if the user has allowed all the permissions we need,
    //get the information about the pages that he or she managers
    $accounts = $facebook->api(
        '/me/accounts',
        'GET',
        array(
            'access_token' => $access_token
        )
    );

    //save the information inside the session
    $_SESSION['access_token'] = $access_token;
    $_SESSION['accounts'] = $accounts['data'];
    //save the first page as the default active page
    $_SESSION['active'] = $accounts['data'][0];

    //redirect to manage.php
    header('Location: ../facebook_result.php');
} else {

    //if not, let's redirect to the ALLOW page so we can get access
    //Create a login URL using the Facebook library's getLoginUrl() method
    $login_url_params = array(
        'scope' => 'read_stream,email',
        'fbconnect' =>  1,
        'display'   =>  "page",
        'next' => 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']
    );
    $login_url = $facebook->getLoginUrl($login_url_params);

    //redirect to the login URL on facebook
    header("Location: {$login_url}");
    exit();
}

?>

Answer 1

Solved it by getting rid of the a lot of the php and using the javascript sdk, took less than three hours to rewrite to do what I wanted.