Function Not Working...Little help

Hello, I am trying to get this function working but it gives me a PHP error (blank page): function Validate_Page_Nav($LastPage, $ErrorPage) { $trimmed = str_replace($staffroot, '', $_SERVER['SCRIPT_NAME']); $resul = $db->query("SELECT * FROM Page_Access WHERE URI = '$trimmed'") or die("failed to get access data"); $page_access = $resul->fetch_assoc(); $URI_access = explode(",", $page_access['User_Level']); if($_SESSION['Last_Page'] != $LastPage}) { header("location: {$ErrorPage}?message=Unable to update user information."); exit(); } if(in_array($_SESSION['Staff_level'], $URI_access)) { echo "Access"; exit(); }else{ echo "No Access"; //header("location: {$ErrorPage}?message=Unable to update user information."); exit(); } } Validate_Page_Nav("user_list.php", "user_list.php"); There are parts of the code I was trying to debug. Any help would be appreciated. Don Wieland D W D a t a C o n c e p t s ~~~~~~~~~~~~~~~~~~~~~~~~~ donw@dwdataconcepts.com Direct Line - (949) 305-2771 Integrated data solutions to fit your business needs. Need assistance in dialing in your FileMaker solution? Check out our Developer Support Plan at: http://www.dwdataconcepts.com/DevSup.html Appointment 1.0v9 - Powerful Appointment Scheduling for FileMaker Pro 9 or higher http://www.appointment10.com For a quick overview - http://www.appointment10.com/Appt10_Promo/Overview.html