WP_Sitemaps::render_sitemaps()

163	public function render_sitemaps() {164		global $wp_query;165 166		$sitemap         = sanitize_text_field( get_query_var( 'sitemap' ) );167		$object_subtype  = sanitize_text_field( get_query_var( 'sitemap-subtype' ) );168		$stylesheet_type = sanitize_text_field( get_query_var( 'sitemap-stylesheet' ) );169		$paged           = absint( get_query_var( 'paged' ) );170 171		// Bail early if this isn't a sitemap or stylesheet route.172		if ( ! ( $sitemap || $stylesheet_type ) ) {173			return;174		}175 176		if ( ! $this->sitemaps_enabled() ) {177			$wp_query->set_404();178			status_header( 404 );179			return;180		}181 182		// Render stylesheet if this is stylesheet route.183		if ( $stylesheet_type ) {184			$stylesheet = new WP_Sitemaps_Stylesheet();185 186			$stylesheet->render_stylesheet( $stylesheet_type );187			exit;188		}189 190		// Render the index.191		if ( 'index' === $sitemap ) {192			$sitemap_list = $this->index->get_sitemap_list();193 194			$this->renderer->render_index( $sitemap_list );195			exit;196		}197 198		$provider = $this->registry->get_provider( $sitemap );199 200		if ( ! $provider ) {201			return;202		}203 204		if ( empty( $paged ) ) {205			$paged = 1;206		}207 208		$url_list = $provider->get_url_list( $paged, $object_subtype );209 210		// Force a 404 and bail early if no URLs are present.211		if ( empty( $url_list ) ) {212			$wp_query->set_404();213			status_header( 404 );214			return;215		}216 217		$this->renderer->render_sitemap( $url_list );218		exit;219	}