$db = new DB_Functions();
// json response array
//$response = array("error" => FALSE);
if (isset($_POST['br_id']) && isset($_POST['ambulance_id'])) {
    // receiving the post params
    $Br_id = $_POST['br_id'];
    $Ambulance_Type = $_POST['ambulance_type'];
    $Ambulance_Id = $_POST['ambulance_id'];
    $Pat_Name = $_POST['pat_name'];
    $Address = $_POST['address'];
    $Date = $_POST['date'];
    $Time = $_POST['time'];
    $Am_Sch_Id = $_POST['am_sch_id'];
    if ($_POST['am_sch_id'] == "") {
        // check if patient already exists
        if ($db->isAmbulanceSchedule($Ambulance_Id)) {
            // Bed already allocated
            $response["response"] = 0;
            $response["message"] = $Ambulance_Id . " already exists";
            echo json_encode($response);
        } else {
            // create a new user$Cust_Name, $Cust_Email, $Cust_Phone,$Cust_Address,$Cust_City,$Cust_State
            $user = $db->insertAmbulanceSchedule($Br_Id, $Ambulance_Type, $Ambulance_Id, $Pat_Name, $Address, $Date, $Time);
            if ($user) {
                // Bed allocated successfully
                $response["response"] = 1;
                $response["message"] = "Ambulance Scheduled.";
                echo json_encode($response);
            } else {
                // Bed allocation failed
                $response["response"] = 2;