<?php
if (!eregi("modules.php", $PHP_SELF)) {
  die ("You can't access this file directly...");
}
require_once("mainfile.php");
// 0 : do not show right blocks - 1:show right blocks
$index = 0; 
include("header.php");
?>
// PUT HTML OR JAVASCRIPT CODE HERE, 
// OR GET RID OF THE ?> AND <?php ABOVE AND BELOW THIS LINE 
// AND USE PHP CODE HERE INSTEAD.
<?php
include("footer.php");
?>