Here is how you can tell if a user likes your app no matter which Javascript API your Facebook application uses.

UPDATE: Using PHP

Put the following in a *.php file hosted on your server and then create a Facebook Tab application pointing to your server’s php file. You will be able to tell if a Facebook user liked your tab with the following.

	<?php
	$signed_request = $_REQUEST["signed_request"];
	list($encoded_sig, $payload) = explode('.', $signed_request, 2);
	$data = json_decode(base64_decode(strtr($payload, '-_', '+/')), true);
	if (empty($data["page"]["liked"])):?>
		<p>The viewer has not clicked like for your page.</p>
	<?php else: ?>
		<p>The viewer liked your page.</p>
	<?php endif; ?>

(Current) JavaScript SDK

I was able to find more documentation on the current JS API so I could tell if a user was a fan when the page loads and as they click to “like” or “unlike”.

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If you’re new to Magento, you may be confused as to how to add a contact form to your store. It wasn’t very intuitive for me so I thought I’d add this quick reference and maybe help someone out. There are two steps involved.

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