wp-includes/sitemaps/providers/class-wp-sitemaps-posts.php:181Gets the max number of pages available for the object type.
$object_subtypestringoptional''intOne hook fires while WP_Sitemaps_Posts::get_max_num_pages() runs, in this order:
Filters the max number of pages before it is generated.
public function get_max_num_pages( $object_subtype = '' ) { if ( empty( $object_subtype ) ) { return 0; } // Restores the more descriptive, specific name for use within this method. $post_type = $object_subtype; /** * Filters the max number of pages before it is generated. * * Passing a non-null value will short-circuit the generation, * returning that value instead. * * @since 5.5.0 * * @param int|null $max_num_pages The maximum number of pages. Default null. * @param string $post_type Post type name. */ $max_num_pages = apply_filters( 'wp_sitemaps_posts_pre_max_num_pages', null, $post_type ); if ( null !== $max_num_pages ) { return $max_num_pages; } $args = $this->get_posts_query_args( $post_type ); $args['fields'] = 'ids'; $args['no_found_rows'] = false; $query = new WP_Query( $args ); $min_num_pages = ( 'page' === $post_type && 'posts' === get_option( 'show_on_front' ) ) ? 1 : 0; return isset( $query->max_num_pages ) ? max( $min_num_pages, $query->max_num_pages ) : 1; }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/providers/class-wp-sitemaps-posts.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.