if ($error == "") {
   $app_token = file_get_contents("https://graph.facebook.com/oauth/access_token?client_id=".$_POST['appid']."&client_secret=".$_POST['appsecret']."&grant_type=client_credentials");
   if (!strstr(" ".$app_token,"access_token=")) {
    $error = "It appears the application ID and secret key you entered are invalid (Could not grab app authroization token)<br/>";
   }
   else
   {
    $app_token = str_replace("access_token=","",$app_token);
   }
  }