Issue
I'm learning to create a FB iframe tab app. For now I just want to check if the user that watches the page is an admin or not. So I have this code in my index.php:
<?php
require 'inc/facebook.php';
$facebook = new Facebook(array(
'appId' => 'xxxxxxxxxxxx',
'secret' => 'xxxxxxxxxxxxxxxxxxxxxxxxx',
));
$user = $facebook->getUser();
$access_token = $facebook->getAccessToken();
if ($user) {
try {
$user_friendList = $facebook->api('/me/friends?access_token='.$access_token);
$user_profile = $facebook->api('/me','GET');
} catch (FacebookApiException $e) {
error_log($e);
$user = null;
}
}
$signed_request = $facebook->getSignedRequest();
$page_id = "";
if( $page = $signed_request['page'] ) {
$page_id = $page['id'];
} else { $page_id = "some id"; }
?>
<!doctype html>
<html>
<head>
<title>php-sdk</title>
<link href="css/style.css" rel="stylesheet" type="text/css">
<script type="text/javascript">
var page_id = <?php echo $page_id; ?>;
var user_id = <?php echo $user; ?>;
var is_admin = <?php echo $page['admin']; ?>;
</script>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript" src="scripts/functionality.js"></script>
...rest of the code...
Then in my functionality.js file I have this code, which should fire an alert dialog when the page loads:
$(function(){
alert("Is admin: "+is_admin);
});
I'm the creator of the page where this app is being tested and the developer of the app. When I open this tab - I see the alert dialog pop-up as it should. I gave a Developer and a Tester role to 2 of my friends, and when they open the tab - the dialog doesn't pop-up for them. Any thoughts why is it happening and how to fix it?
Solution
The signed_request returns [admin] => 1 if the user is an admin or [admin] => otherwise. There is no true or false value. You can modify your code to something like:
<script type="text/javascript">
var page_id = "<?php echo $page_id; ?>";
var user_id = "<?php echo $user; ?>";
var is_admin = "<?php echo isset( $page['admin'] ) && $page['admin'] == 1 ? true : false; ?>";
</script>
Answered By - Niraj Shah
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