PHP SDK: How do I capture the access token after user auths app?

Question

This is for a canvas app on the Facebook Platform using the new(est) Facebook PHP SDK.

We are using the PHP example from the Facebook tutorial (https://developers.fa

Answer 1

Problem

The access_token in your pasted URL is not part of the query string, but instead contained in the URL fragment (after the #). URL fragments are not sent to the web server, and are readable only by client-side code like Javascript. Therefore the PHP SDK only sees http://karmakorn.com/karmakorn/alpha20/kk-fb-auth.php, which is why $_REQUEST does not contain an access_token key.

Questions / Notes

1. What are you using for your redirect_uri? I think you want to be using something like http://apps.facebook.com/your_canvas_url/

2. You shouldn't need to call parse_signed_request yourself or copy any code from the signed request page. The PHP SDK will do that for you. Just call:

   $facebook = new Facebook(array(
       'appId' => '…',
       'secret' => '…',
   ));
   $access_token = $facebook->getAccessToken();
   

Possible solutions

1. Also use the Facebook Javascript SDK. You can start by adding its