Working on CarMusing facebook application -added a dialog box to ask the visitor for authorization before he/she enters the application.

I also need 10 MAU so I can submit the application in the facebook application directory.

Here is the code I added (the application is written in PHP):

$app_id = 253259658030262;

$canvas_page = "http://apps.facebook.com/carmusing-directory/";

$auth_url = "http://www.facebook.com/dialog/oauth?client_id="
. $app_id . "&redirect_uri=" . urlencode($canvas_page);


$signed_request = $_REQUEST["signed_request"];

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

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


if (empty($data["user_id"])) {
echo("");
}



After this just add the code of your application - or parts of your website... There is very little facebook applications for used cars - one of the reasons why we are working on this project.