wp-includes/sitemaps.php:67Registers a new sitemap provider.
$namestring$providerWP_Sitemaps_Providerboolfunction wp_register_sitemap_provider( $name, WP_Sitemaps_Provider $provider ) { $sitemaps = wp_sitemaps_get_server(); return $sitemaps->registry->add_provider( $name, $provider );}Introduced in 5.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/sitemaps.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.