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function is not described

create_initial_taxonomies() WP 2.8.0

Creates the initial taxonomies.

This function fires twice: in wp-settings.php before plugins are loaded (for backward compatibility reasons), and again on the 'init' action. We must avoid registering rewrite rules before the 'init' action.

Hooks from the function
Return

Null. Nothing.

Usage

create_initial_taxonomies();

Notes

  • Global. WP_Rewrite. $wp_rewrite WordPress rewrite component.

Changelog

Since 2.8.0 Introduced.

Code of create_initial_taxonomies() WP 5.5.1

<?php
function create_initial_taxonomies() {
	global $wp_rewrite;

	if ( ! did_action( 'init' ) ) {
		$rewrite = array(
			'category'    => false,
			'post_tag'    => false,
			'post_format' => false,
		);
	} else {

		/**
		 * Filters the post formats rewrite base.
		 *
		 * @since 3.1.0
		 *
		 * @param string $context Context of the rewrite base. Default 'type'.
		 */
		$post_format_base = apply_filters( 'post_format_rewrite_base', 'type' );
		$rewrite          = array(
			'category'    => array(
				'hierarchical' => true,
				'slug'         => get_option( 'category_base' ) ? get_option( 'category_base' ) : 'category',
				'with_front'   => ! get_option( 'category_base' ) || $wp_rewrite->using_index_permalinks(),
				'ep_mask'      => EP_CATEGORIES,
			),
			'post_tag'    => array(
				'hierarchical' => false,
				'slug'         => get_option( 'tag_base' ) ? get_option( 'tag_base' ) : 'tag',
				'with_front'   => ! get_option( 'tag_base' ) || $wp_rewrite->using_index_permalinks(),
				'ep_mask'      => EP_TAGS,
			),
			'post_format' => $post_format_base ? array( 'slug' => $post_format_base ) : false,
		);
	}

	register_taxonomy(
		'category',
		'post',
		array(
			'hierarchical'          => true,
			'query_var'             => 'category_name',
			'rewrite'               => $rewrite['category'],
			'public'                => true,
			'show_ui'               => true,
			'show_admin_column'     => true,
			'_builtin'              => true,
			'capabilities'          => array(
				'manage_terms' => 'manage_categories',
				'edit_terms'   => 'edit_categories',
				'delete_terms' => 'delete_categories',
				'assign_terms' => 'assign_categories',
			),
			'show_in_rest'          => true,
			'rest_base'             => 'categories',
			'rest_controller_class' => 'WP_REST_Terms_Controller',
		)
	);

	register_taxonomy(
		'post_tag',
		'post',
		array(
			'hierarchical'          => false,
			'query_var'             => 'tag',
			'rewrite'               => $rewrite['post_tag'],
			'public'                => true,
			'show_ui'               => true,
			'show_admin_column'     => true,
			'_builtin'              => true,
			'capabilities'          => array(
				'manage_terms' => 'manage_post_tags',
				'edit_terms'   => 'edit_post_tags',
				'delete_terms' => 'delete_post_tags',
				'assign_terms' => 'assign_post_tags',
			),
			'show_in_rest'          => true,
			'rest_base'             => 'tags',
			'rest_controller_class' => 'WP_REST_Terms_Controller',
		)
	);

	register_taxonomy(
		'nav_menu',
		'nav_menu_item',
		array(
			'public'            => false,
			'hierarchical'      => false,
			'labels'            => array(
				'name'          => __( 'Navigation Menus' ),
				'singular_name' => __( 'Navigation Menu' ),
			),
			'query_var'         => false,
			'rewrite'           => false,
			'show_ui'           => false,
			'_builtin'          => true,
			'show_in_nav_menus' => false,
		)
	);

	register_taxonomy(
		'link_category',
		'link',
		array(
			'hierarchical' => false,
			'labels'       => array(
				'name'                       => __( 'Link Categories' ),
				'singular_name'              => __( 'Link Category' ),
				'search_items'               => __( 'Search Link Categories' ),
				'popular_items'              => null,
				'all_items'                  => __( 'All Link Categories' ),
				'edit_item'                  => __( 'Edit Link Category' ),
				'update_item'                => __( 'Update Link Category' ),
				'add_new_item'               => __( 'Add New Link Category' ),
				'new_item_name'              => __( 'New Link Category Name' ),
				'separate_items_with_commas' => null,
				'add_or_remove_items'        => null,
				'choose_from_most_used'      => null,
				'back_to_items'              => __( '&larr; Back to Link Categories' ),
			),
			'capabilities' => array(
				'manage_terms' => 'manage_links',
				'edit_terms'   => 'manage_links',
				'delete_terms' => 'manage_links',
				'assign_terms' => 'manage_links',
			),
			'query_var'    => false,
			'rewrite'      => false,
			'public'       => false,
			'show_ui'      => true,
			'_builtin'     => true,
		)
	);

	register_taxonomy(
		'post_format',
		'post',
		array(
			'public'            => true,
			'hierarchical'      => false,
			'labels'            => array(
				'name'          => _x( 'Formats', 'post format' ),
				'singular_name' => _x( 'Format', 'post format' ),
			),
			'query_var'         => true,
			'rewrite'           => $rewrite['post_format'],
			'show_ui'           => false,
			'_builtin'          => true,
			'show_in_nav_menus' => current_theme_supports( 'post-formats' ),
		)
	);
}