<?php
$sitemaps_helper_path = $_SERVER['DOCUMENT_ROOT'] . '/local/php_interface/include/ib_scripts/sitemaps_helper.php';
if (file_exists($sitemaps_helper_path)) {
    require_once $sitemaps_helper_path;
} else {
    require_once $_SERVER['DOCUMENT_ROOT'] . '/bitrix/header.php';
    CHTTP::SetStatus('404 Not Found');
    @define('ERROR_404', 'Y');
    require_once $_SERVER['DOCUMENT_ROOT'] . '/bitrix/footer.php';
}