How to make popup to ask user about advanced resolution in i-frame application

Question

I am trying to create a facebook application using iframe (not fbml). I am using php client. after many attempts, I cannot publish the stream, nor can I create a popup to ask the user to get extended permission. I used the following:

function facebook_prompt_permission(permission) 
{
    ensure_init(function() 
    {
        //check is user already granted for this permission or not
        FB.Facebook.apiClient.users_hasAppPermission(permission,
           function(result) {
               // prompt offline permission
               if (result == 0) 
               {
                  alert(result);
                  // render the permission dialog
                  FB.Connect.showPermissionDialog(permission,function(result)
                  {
                        if (result == null)
                            alert('no permissons granted');
                        else
                            alert('permissions ' + result);
                  },true,null);
               } 
               else 
               {
                   // permission already granted.
                   alert("permission already granted");
               }
       });
   });
}




facebook_prompt_permission('publish_stream');

The response to the permission check comes in as 0, but when I try to FB.Connect.showPermissionDialogshow a popup to ask the user for permission, nothing happens; no popups.

Answer 1

/* Need to check this user has the permissions to post to wall etc....*/
if (!$facebook->api_client->users_hasAppPermission("publish_stream")) {
    // Redirect for permissions
    $url = "http://www.facebook.com/connect/prompt_permissions.php?api_key=$apikey&v=1.0&ext_perm=publish_stream&next=[YOURAPPURL]";
    header("Location: $url");
    exit;
}