function get_total_available_rooms($room_type_ID, $from, $to)
{
    $exclude = array();
    $range = get_dates_from_date_range($from, $to);
    foreach ($range as $i => $k) {
        if ($guests = get_guest_calendar_by_room_and_datein($room_type_ID, format_db_date($k))) {
            foreach ($guests as $g) {
                $exclude[] = $g->room_ID;
            }
        }
    }
    return count(get_rooms_by_type($room_type_ID, $exclude));
    //->found_posts;
}
 public function count_available_rooms()
 {
     if (defined('DOING_AJAX') && DOING_AJAX) {
         $room_type_ID = browser_get('room_type_ID', 0);
         $rooms = get_rooms_by_type($room_type_ID);
         // print_me($rooms);
         wp_send_json_success(array('total_rooms' => count($rooms)));
     }
 }