Парочка вопросов по dle

<?php
/* ===========================================================
 Файл: lastuser.php
--------------------------------------------------------------
 Назначение: Вывод последнего зарегистрированного пользователя
=========================================================== */

if(!defined('DATALIFEENGINE')) {
    die("Hacking attempt!");
}

$lastuser = dle_cache( "lastusers", $lastuser );

if (!$lastuser) {
    $row = $db->super_query("SELECT name FROM " . PREFIX . "_users ORDER BY user_id DESC LIMIT 0,1");

    if ($config['allow_alt_url'] == "yes") {
        $lastuser = "<a href=\"/user/" . urlencode($row['name']) . "/\" onclick=\"ShowUserHint('" . urlencode($row['name']) . "', this); return false;\">" . $row['name'] . "</a>";
    } else {
        $lastuser = "<a href=\"$PHP_SELF?subaction=userinfo&user=" . urlencode($row['name']) . "\">" . $row['name'] . "</a>";
    }

    create_cache ( "lastusers", $lastuser);
}

echo $lastuser;

?>