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* Sitemaps: WP_Sitemaps_Registry class
* Handles registering sitemap providers.
* Class WP_Sitemaps_Registry.
#[AllowDynamicProperties]
class WP_Sitemaps_Registry {
* Registered sitemap providers.
* @var WP_Sitemaps_Provider[] Array of registered sitemap providers.
private $providers = array();
* Adds a new sitemap provider.
* @param string $name Name of the sitemap provider.
* @param WP_Sitemaps_Provider $provider Instance of a WP_Sitemaps_Provider.
* @return bool Whether the provider was added successfully.
public function add_provider( $name, WP_Sitemaps_Provider $provider ) {
if ( isset( $this->providers[ $name ] ) ) {
* Filters the sitemap provider before it is added.
* @param WP_Sitemaps_Provider $provider Instance of a WP_Sitemaps_Provider.
* @param string $name Name of the sitemap provider.
$provider = apply_filters( 'wp_sitemaps_add_provider', $provider, $name );
if ( ! $provider instanceof WP_Sitemaps_Provider ) {
$this->providers[ $name ] = $provider;
* Returns a single registered sitemap provider.
* @param string $name Sitemap provider name.
* @return WP_Sitemaps_Provider|null Sitemap provider if it exists, null otherwise.
public function get_provider( $name ) {
if ( ! is_string( $name ) || ! isset( $this->providers[ $name ] ) ) {
return $this->providers[ $name ];
* Returns all registered sitemap providers.
* @return WP_Sitemaps_Provider[] Array of sitemap providers.
public function get_providers() {