WordPress at a glance
function is not described

WP_Post_Type::register_taxonomies() WP 4.6.0

Registers the taxonomies for the post type.

This is a method of the class: WP_Post_Type

No Hooks.

Return

Null. Nothing.

Usage

$WP_Post_Type = new WP_Post_Type();
$var = $WP_Post_Type->register_taxonomies();

Changelog

Since 4.6.0 Introduced.

Code of WP Post Type::register taxonomies: wp-includes/class-wp-post-type.php WP 5.2.2

<?php
public function register_taxonomies() {
	foreach ( $this->taxonomies as $taxonomy ) {
		register_taxonomy_for_object_type( $taxonomy, $this->name );
	}
}