{* display value of page from URL ($_GET)
http://www.example.com/index.php?page=foo *}
{$smarty.get.page}
{* display the variable "page" from a form ($_POST['page']) *}
{$smarty.post.page}
{* display the value of the cookie "username" ($_COOKIE['username']) *}
{$smarty.cookies.username}
{* display the server variable "SERVER_NAME" ($_SERVER['SERVER_NAME'])*}
{$smarty.server.SERVER_NAME}
{* display the system environment variable "PATH" *}
{$smarty.env.PATH}
{* display the php session variable "id" ($_SESSION['id']) *}
{$smarty.session.id}
{* display the variable "username" from merged get/post/cookies/server/env *}
{$smarty.request.username}