Facebook PHP-SDK - login/logout problems

pushkidman · May 7, 2013

Hi! I am trying to put Facebook SDK to work.

I had this code, which I slighly modified, from some internet tutorial:

<?php
$fbconfig['appid'] = "...";
$fbconfig['secret'] = "...";
$fbconfig['baseurl'] = "...";

$user = null; //facebook user uid
try {
    include_once "facebook.php";
} catch (Exception $o) {
    error_log($o);
}
// Create our Application instance.
$facebook = new Facebook(array(
            'appId' => $fbconfig['appid'],
            'secret' => $fbconfig['secret'],
        ));

//print $facebook->getAccessToken() . '<br/>';

$user = $facebook->getUser();

$loginUrl = $facebook->getLoginUrl(
        array(
            'scope' => 'email,offline_access,publish_stream,user_birthday,user_location,user_work_history,user_about_me,user_hometown',
            'redirect_uri' => $fbconfig['baseurl']
        )
);

if ($user) {
    if (isset($_GET['publish'])) {
        try {
            $publishStream = $facebook->api("/$user/feed", 'post', array(
                'message' => "...",
                'link' => '...',
                'picture' => '...',
                'name' => 'iPlay, iWin',
                'description' => '...'
                    )
            );
            //as $_GET['publish'] is set so remove it by redirecting user to the base url 
        } catch (FacebookApiException $e) {
            d($e);
        }
        $redirectUrl = $fbconfig['baseurl'] . '?success=1';
        header("Location: $redirectUrl");
    }

    //fql query example using legacy method call and passing parameter
    try {
        $fql = "select name, hometown_location, sex, pic, pic_square, pic_big from user where uid=" . $user;
        $param = array(
            'method' => 'fql.query',
            'query' => $fql,
            'callback' => ''
        );
        $fqlResult = $facebook->api($param);
        
        print_r($fqlResult);
        
        $fql = "select url, real_height from profile_pic where id=" . $user;
        $param = array(
            'method' => 'fql.query',
            'query' => $fql,
            'callback' => ''
        );
        $fqlResult = $facebook->api($param);
    } catch (Exception $o) {
        d($o);
    }
}
?>

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:fb="http://www.facebook.com/2008/fbml">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
        <title>FB Test</title>

    </head>
    <body>

   <?php if (!$user) { ?>
            <a href="<?= $loginUrl ?>">Facebook Login</a>
        <?php } else { ?>
            <div><a href="<?= $facebook->getLogoutUrl(); ?>">Facebook Logout</a></div>
            <div>You are in! <a href="?publish=1">Share your details with us</a>!</div>
        <?php } ?>

        <?php if ($_GET['success']) : ?>
            <div>Check you FB wall!</div>
        <?php endif; ?>
    </body>
</html>

There are two troubles I have with this code:

1. When I am logged in with Facebook and I go to this page, I still have to connect to FB manually via $loginUrl. Is this OK in terms of SDK? Or am I doing something wrong?

2. When I click on logout URL, nothing happens on the page. It seems to log me out properly out of my actual FB account, but on the page $user object still exists. Sometimes I have to click logout URL several times, before I actually see changes on the page. Why is that?

Thanks in advance for any sort of help!

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Facebook PHP-SDK - login/logout problems

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