'https://www.example.com/wp-content/uploads/extra-image.jpg' ]); return $images; }; add_filter( 'wpseo_sitemap_urlimages', 'filter_wpseo_sitemap_urlimages' ); // Post Types (posts, pages, custom post) add_filter( 'wpseo_sitemap_urlimages_term', 'filter_wpseo_sitemap_urlimages' ); // Taxonomies (category, tags)