Stuff

<?php
$directories = array('/a/', '/b/', '/c/', '/d/', '/e/', '/f/', '/g/', '/h/', '/i/', '/j/', '/k/', '/l/', '/m/', '/n/', '/o/', '/p/', '/q/', '/r/', '/s/', '/t/', '/u/', '/v/', '/w/', '/x/', '/y/', '/z/');

$file = $_SERVER['DOCUMENT_ROOT'] . $directories[mt_rand(0, count($directories)-1)] . 'index.htm';

require_once($file);
?>