Driving me nuts - facebook php sdk login- in iframe app tab

dflow · January 16, 2012

im trying to use the :

to get the current logged in user to facebook

the problem is that im getting an old session each time.

i have an app which is inside a facebook iframe.

here is some code i found but it isn't returning the current user:

<?php

require_once('facebook.php');


// Print an individual cookie
echo $_COOKIE["fbsr"];
echo $HTTP_COOKIE_VARS["fbsr"];

// Another way to debug/test is to view all cookies
// after the page reloads, print them out
if (isset($_COOKIE['cookie'])) {
    foreach ($_COOKIE['cookie'] as $name => $value) {
        $name = htmlspecialchars($name);
        $value = htmlspecialchars($value);
        echo "$name : $value <br />\n";
    }
}


  // Remember to copy files from the SDK's src/ directory to a
  // directory in your application on the server, such as php-sdk/
  

// Create our application instance
// (replace this with your appId and secret).
$facebook = new Facebook(array(
   'appId' => 'xxxxxxxxxxxx',
    'secret' => 'xxxxxxx',
));
// Get User ID
$user = $facebook->getUser();

// 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) {
echo '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();
}

// This call will always work since we are fetching public data.


?>
<!doctype html>
<html xmlns:fb="http://www.facebook.com/2008/fbml">
  <head>
    <title>php-sdk</title>
    <style>
      body {
        font-family: 'Lucida Grande', Verdana, Arial, sans-serif;
      }
      h1 a {
        text-decoration: none;
        color: #3b5998;
      }
      h1 a:hover {
        text-decoration: underline;
      }
    </style>
  </head>
  <body>
    <h1>php-sdk</h1>

    <?php if ($user): ?>
      <a href="<?php echo $logoutUrl; ?>">Logout</a>
    <?php else: ?>
      <div>
        Login using OAuth 2.0 handled by the PHP SDK:
        <a href="<?php echo $loginUrl; ?>">Login with Facebook</a>
      </div>
    <?php endif ?>

    <h3>PHP Session</h3>
    <pre><?php print_r($_SESSION); ?></pre>

    <?php if ($user): ?>
      <h3>You</h3>
      <img src="https://graph.facebook.com/<?php echo $user; ?>/picture">

      <h3>Your User Object (/me)</h3>
      <pre><?php print_r($user_profile); ?></pre>
    <?php else: ?>
      <strong><em>You are not Connected.</em></strong>
    <?php endif ?>


   
  </body>
</html>

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Driving me nuts - facebook php sdk login- in iframe app tab

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