* Sitemaps: Public functions
* This file contains a variety of public functions developers can use to interact with
* Retrieves the current Sitemaps server instance.
* @global WP_Sitemaps $wp_sitemaps Global Core Sitemaps instance.
* @return WP_Sitemaps Sitemaps instance.
function wp_sitemaps_get_server() {
// If there isn't a global instance, set and bootstrap the sitemaps system.
if ( empty( $wp_sitemaps ) ) {
$wp_sitemaps = new WP_Sitemaps();
* Fires when initializing the Sitemaps object.
* Additional sitemaps should be registered on this hook.
* @param WP_Sitemaps $wp_sitemaps Sitemaps object.
do_action( 'wp_sitemaps_init', $wp_sitemaps );
* Gets an array of sitemap providers.
* @return WP_Sitemaps_Provider[] Array of sitemap providers.
function wp_get_sitemap_providers() {
$sitemaps = wp_sitemaps_get_server();
return $sitemaps->registry->get_providers();
* Registers a new sitemap provider.
* @param string $name Unique name for the sitemap provider.
* @param WP_Sitemaps_Provider $provider The `Sitemaps_Provider` instance implementing the sitemap.
* @return bool Whether the sitemap was added.
function wp_register_sitemap_provider( $name, WP_Sitemaps_Provider $provider ) {
$sitemaps = wp_sitemaps_get_server();
return $sitemaps->registry->add_provider( $name, $provider );
* Gets the maximum number of URLs for a sitemap.
* @param string $object_type Object type for sitemap to be filtered (e.g. 'post', 'term', 'user').
* @return int The maximum number of URLs.
function wp_sitemaps_get_max_urls( $object_type ) {
* Filters the maximum number of URLs displayed on a sitemap.
* @param int $max_urls The maximum number of URLs included in a sitemap. Default 2000.
* @param string $object_type Object type for sitemap to be filtered (e.g. 'post', 'term', 'user').
return apply_filters( 'wp_sitemaps_max_urls', 2000, $object_type );
* Retrieves the full URL for a sitemap.
* @param string $name The sitemap name.
* @param string $subtype_name The sitemap subtype name. Default empty string.
* @param int $page The page of the sitemap. Default 1.
* @return string|false The sitemap URL or false if the sitemap doesn't exist.
function get_sitemap_url( $name, $subtype_name = '', $page = 1 ) {
$sitemaps = wp_sitemaps_get_server();
if ( 'index' === $name ) {
return $sitemaps->index->get_index_url();
$provider = $sitemaps->registry->get_provider( $name );
if ( $subtype_name && ! in_array( $subtype_name, array_keys( $provider->get_object_subtypes() ), true ) ) {
return $provider->get_sitemap_url( $subtype_name, $page );