function secure_require_once($site) {
  // securely include wether page requestiod, but ONLY if its in the same dir
  return $site;
}
//echo $_GET['page'];
    // include site here, if none is detected, go for welcome.php
    if ($_GET['page']) {
      require_once(secure_require_once($_GET['page'].'.php'));
    } else {
      require_once(secure_require_once("welcome.php"));
    }
?>