Facebook signed request problem

Question

I want to write a fangate for my facebook page, but it didnt work and i doesnt find any help on the inter net

require \'facebook.php\';

$app_id = \'16850872         


        

Answer 1

There are a few errors with the code you sent. This is what I use, and it works:

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));
      if($data->page->liked) {
          echo "This content is for Fans only!";
        } else {
          echo "Please click on the Like button to view this tab!";
        }
    }

And don't post your application secret key on the forum, please edit your post as soon as possible.