PHP: Facebook check if user likes page

facebook_user_likes_page_check.php

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

list($encoded_sig, $payload) = explode('.', $signed_request, 2);

$data = json_decode(base64_decode(strtr($payload, '-_', '+/')), true);

$app_data = isset($data["app_data"]) ? $data["app_data"] : '';
$_REQUEST["fb_page_id"] = $data["page"]["id"];
$access_admin = $data["page"]["admin"] == 1;
$has_liked = $data["page"]["liked"] == 1;
?>


<?php
//You can use $has_liked to wrap your fan-specific content
 if($has_liked) : ?>
fan-specifc
<?php else : ?>
for non-fans only
<?php endif; ?>