detect fans in iframe taq

how to detect fans / non-fans in iframe to display different info. for them?

this code work to detect my app, by not my page....

Code:

<?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 if($has_liked) : ?>
<p>fan-specifc</p>
<?php else : ?>
<p>for non-fans only</p>
<?php endif; ?>
</body>
</html>

The signed up request is the only piece of code that seems to be correct, of the above.

Unfortunately, I cannot post the codes that must be used in an iFrame-based tab for fans and non-fans (copyright reasons), but you can find a tutorial on Google.

You just need to get the signed request, the app's ID, the app's secret key, and then 2 echo's: one for fans, and one for non-fans.

Good luck!

Thx for you hint!

It works now.