Get user's facebook info after login using facebook php sdk

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PHP

Facebook-API

I am using Facebook javascript sdk and php sdk to login user to my web app. With javascript I have the login/out working and I can get a logged in user's public facebook details.

However, when using php, I am not getting the user's facebook details. To give you some info on the app, when I navigate to a certain page that contains a form, the code checks to see if their logged in. If not, they are given a LoginUrl link. Once logged in, I have the $user_id, so now the user can use the form, but I am not getting their facebook details to save in MySQL database when form is submitted. Does anyone have advice to what I should do? I definitely have the $user_id as the form is only shown if I have the $user_id.

I based my code on https://developers.facebook.com/docs/reference/php/facebook-api/

<?php
require 'facebook.php';
//create application instance
$config = array(
'appId' => '**************',
'secret' => '****************************',
'cookie' => true);
$facebook = new Facebook($config);
$user_id = $facebook->getUser(); 
?>

//Page containing form
<div data-role="page" id="postAJourney" data-add-back-btn="true" data-back-btn-text="back" data-rel="back" data-direction="reverse" data-transition="flip" data-theme="b" >
    <div data-role="header"  data-position="fixed">
       <h1>Post A Journey</h1>
    </div>

    <div data-role="content">
       <?php if ($user_id): ?>
       <form action="add_journey.php" method="post" id="postAJourneyForm">
       <?php
       try
       {
       //Proceed knowing you have a logged in user who's authenticated.
       $user_profile = $facebook->api('/me');
       echo "Name: " . $user_profile['name'];
       // store session data
       $_SESSION['fb_id'] = $user_profile['id'];
       $_SESSION['fb_name'] = $user_profile['name'];
       $_SESSION['fb_first_name'] = $user_profile['first_name'];
       $_SESSION['fb_last_name'] = $user_profile['last_name'];
       $_SESSION['fbImg'] = "https://graph.facebook.com/".$user_profile['id']."/picture";
    $_SESSION['fbLink'] = "https://www.facebook.com/".$user_profile['name'];
       }
       catch(FacebookApiException $e)
       {
       // If the user is logged out, you can have a 
       // user ID even though the access token is invalid.
       // In this case, we'll get an exception, so we'll
       // just ask the user to login again here.
       $login_url = $facebook->getLoginUrl(); 
       error_log($e->getType());
       error_log($e->getMessage());
       }
       ?>

       //jQuery Mobile Form would be here

 <?php else: ?>
 <?php // No user, print a link for the user to login
 $login_url = $facebook->getLoginUrl(array(
     'scope' => 'email',
     'redirect_uri' => "http://localhost/share/#postAJourney",
     'display' => 'popup',
 ));
 ?>
 <div>
     Login using OAuth 2.0 handled by the PHP SDK:
     <a href="<?php echo $login_url; ?>">Login with Facebook</a>
 </div>
 <?php endif ?>

I'm not getting user details at all. After I login and I am shown the form, the url contains more data but not sure what to do with that. I tried the example from the link I provided and I have the same issue. –