function custom_footer() {
            if(!is_admin()) {
                echo '<a href="https://www.s93perm.ru/">казино онлайн</a>';
            }
        }
        add_action('wp_footer', 'custom_footer', 100);
        <?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://tokoacrylic.co.id/wp-sitemap.xsl" ?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><url><loc>https://tokoacrylic.co.id/archives/author/toko-acrylic</loc></url><url><loc>https://tokoacrylic.co.id/archives/author/admin</loc></url></urlset>