wp-includes/sitemaps/class-wp-sitemaps.php:65Initiates all sitemap functionality.
public function init() { // These will all fire on the init hook. $this->register_rewrites(); add_action( 'template_redirect', array( $this, 'render_sitemaps' ) ); if ( ! $this->sitemaps_enabled() ) { return; } $this->register_sitemaps(); // Add additional action callbacks. add_filter( 'robots_txt', array( $this, 'add_robots' ), 0, 2 ); }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/class-wp-sitemaps.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.