Question

Is there a way for a Flash Facebook app in an iFrame to detect if the user is a fan of the page using the Graph API for Actionscript 3? If not can I achieve the same goal using Javascript? without asking the user for permission (no access token required).

Answer 1

Finally found the solution. In the page that carries the Facebook app, add:

<?php
$signed_request = $_REQUEST["signed_request"];

list($encoded_sig, $payload) = explode('.', $signed_request, 2);
$data = json_decode(base64_decode(strtr($payload, '-_', '+/')), true);
$liked = isset($data["page"]["liked"]) ? $data["page"]["liked"] : '';
?>

$liked = true if the logged in user likes the page, false otherwise.