Question

141

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

rated 0 times [ 143] [ 2] / answers: 1 / hits: 157033 / 14 Years ago, wed, february 23, 2011, 12:00:00

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.api({

    method:     pages.isFan,

    page_id:        my_page_id,

},  function(response) {

        console.log(response);

        if(response){

            alert('You Likey');

        } else {

            alert('You not Likey :(');

        }

    }

);

This returns: False

But I'm a fan of my page so shouldn't it return true?!

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tylerdamiena

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answered 14 Years ago makaylahh · Accepted Answer

I tore my hair out over this one too. Your code only works if the user has granted an extended permission for that which is not ideal.

Here's another approach.

In a nutshell, if you turn on the OAuth 2.0 for Canvas advanced option, Facebook will send a $_REQUEST['signed_request'] along with every page requested within your tab app. If you parse that signed_request you can get some info about the user including if they've liked the page or not.

function parsePageSignedRequest() {

    if (isset($_REQUEST['signed_request'])) {

      $encoded_sig = null;

      $payload = null;

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

      $sig = base64_decode(strtr($encoded_sig, '-_', '+/'));

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

      return $data;

    }

    return false;

  }

  if($signed_request = parsePageSignedRequest()) {

    if($signed_request->page->liked) {

      echo This content is for Fans only!;

    } else {

      echo Please click on the Like button to view this tab!;

    }

  }