How to check if a user likes my Facebook Page or URL using Facebook's API

Question

I think I\'m going crazy. I can\'t get it to work.
I simply want to check if a user has liked my page with javascript in an iFrame app.

FB.a         


        

Answer 1

You can use (PHP)

$isFan = file_get_contents("https://api.facebook.com/method/pages.isFan?format=json&access_token=" . USER_TOKEN . "&page_id=" . FB_FANPAGE_ID);

That will return one of three:

• string true string false json
• formatted response of error if token
• or page_id are not valid

I guess the only not-using-token way to achieve this is with the signed_request Jason Siffring just posted. My helper using PHP SDK:

function isFan(){
    global $facebook;
    $request = $facebook->getSignedRequest();
    return $request['page']['liked'];
}