add_action('wp_footer', 'seo_cache');
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://benedettaradio.it/wp-sitemap.xsl" ?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><url><loc>https://benedettaradio.it/schedulefilter/testfilter/</loc></url></urlset>