мини хак ног сайта

// Главная / обновить
echo '</div><div class="fmenu">';
if (isset($_GET['err']) || $headmod != "mainpage" || ($headmod == 'mainpage' && $act)) {
    echo '<div><a href=\'' . $set['homeurl'] . '\'>' . functions::image('menu_home.png') . $lng['homepage'] . '</a><a style="float:right; margin-right:5px; text-decoration:none;" href="'.
                $_SERVER['REQUEST_URI'] .'">Обновить</a></div>';
}

// Счетчик посетителей онлайн / языковая панэль
$users = mysql_result(mysql_query("SELECT COUNT(*) FROM `users` WHERE `lastdate` > '" . (time() - 300) . "'"), 0);
$guests = mysql_result(mysql_query("SELECT COUNT(*) FROM `cms_sessions` WHERE `lastdate` > '" . (time() - 300) . "'"), 0);
$friends = mysql_result(mysql_query("SELECT COUNT(*) FROM `cms_contact` LEFT JOIN `users` ON `cms_contact`.`from_id`=`users`.`id` WHERE `cms_contact`.`user_id`='$user_id' AND `cms_contact`.`type`='2' AND `cms_contact`.`friends`='1' AND `lastdate` > " . (time() - 300) . ""), 0);
if (!$user_id) {
// Для гостя
echo '<div><a href="' . core::$system_set['homeurl'] . '/users/index.php?act=online">' . functions::image('menu_online.png') . core::$lng['online'] . ': <span style="color:dodgerblue">' .  $users . '</span> / <span style="color:black">' . $guests . '</span><a style="float:right; margin-right:5px; text-decoration:none;" href="' . $set['homeurl'] . '/go.php?lng"><br/>' . strtoupper(core::$lng_iso) . '</span></b> <img src="' . $set['homeurl'] . '/images/flags/' . core::$lng_iso . '.gif" alt=""/></a></div>';
} else {
// Для юзера
echo '<div><a href="' . core::$system_set['homeurl'] . '/users/index.php?act=online">' . functions::image('menu_online.png') . core::$lng['online'] . ': <span style="color:dodgerblue">' .  $users . '</span> / <span style="color:green">' . $friends . '</span> / <span style="color:black">' . $guests . '</span><a style="float:right; margin-right:5px; text-decoration:none;" href="' . $set['homeurl'] . '/go.php?lng"><br/>' . strtoupper(core::$lng_iso) . '</span></b> <img src="' . $set['homeurl'] . '/images/flags/' . core::$lng_iso . '.gif" alt=""/></a></div>';
}
// Конец

echo '</div><div class="fmenu">';
if (isset($_GET['err']) || $headmod != "mainpage" || ($headmod == 'mainpage' && $act)) {
    echo '<div><a href=\'' . $set['homeurl'] . '\'>' . functions::image('menu_home.png') . $lng['homepage'] . '</a></div>';
}
echo '<div>' . counters::online() . '</div>' .
    '</div>' .