Fotiman - 1:20 pm on May 23, 2012 (gmt 0)

Is there an error message that might indicate what is wrong? It's been a while since I've done any PHP, so perhaps I have the quotes wrong. But I think it's probably a problem with the { } characters. Maybe give this a try in place of the current echo line:

$arr = array("balance" => number_format($balance,2), "class" => $class); echo json_encode($arr);

Also, replace the "Missing id" bit with this:

$arr = array("error" => "Missing id"); echo json_encode($arr);