main.php

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
 <head>
  <title>Главная страница</title>
  <link rel="stylesheet" type="text/css" href="css/main.css" />
 </head>
 <body>
  Привет, $USERNAME$! $GET$
 </body>
</html>