Smarty display multiple template pages with single php page

<?php
//sample link: <a href="page.php?page=contact">Contact</a>
$smarty->display('header.php');
$page = (isset($_GET['page']))?$_GET['page']:'';
switch($page) {
  case 'contact':
    $smarty->display('contact.php');
    break;
  case 'termsofuse':
    $smarty->display('termsofuse.php');
    break;
}
$smarty->display('footer.php');
?>