register_taxonomy


register_taxonomy ( $taxonomy, $object_type, $args = array() )

Parameters:
  • (string) taxonomy Taxonomy key. Must not exceed 32 characters and may only contain lowercase alphanumeric characters, dashes, and underscores. See sanitize_key().
  • (array|string) object_type Object type or array of object types with which the taxonomy should be associated.
  • (array|string) args { Optional. Array or query string of arguments for registering a taxonomy. @type string[] $labels An array of labels for this taxonomy. By default, Tag labels are used for non-hierarchical taxonomies, and Category labels are used for hierarchical taxonomies. See accepted values in get_taxonomy_labels(). Default empty array. @type string $description A short descriptive summary of what the taxonomy is for. Default empty. @type bool $public Whether a taxonomy is intended for use publicly either via the admin interface or by front-end users. The default settings of `$publicly_queryable`, `$show_ui`, and `$show_in_nav_menus` are inherited from `$public`. @type bool $publicly_queryable Whether the taxonomy is publicly queryable. If not set, the default is inherited from `$public` @type bool $hierarchical Whether the taxonomy is hierarchical. Default false. @type bool $show_ui Whether to generate and allow a UI for managing terms in this taxonomy in the admin. If not set, the default is inherited from `$public` (default true). @type bool $show_in_menu Whether to show the taxonomy in the admin menu. If true, the taxonomy is shown as a submenu of the object type menu. If false, no menu is shown. `$show_ui` must be true. If not set, default is inherited from `$show_ui` (default true). @type bool $show_in_nav_menus Makes this taxonomy available for selection in navigation menus. If not set, the default is inherited from `$public` (default true). @type bool $show_in_rest Whether to include the taxonomy in the REST API. Set this to true for the taxonomy to be available in the block editor. @type string $rest_base To change the base url of REST API route. Default is $taxonomy. @type string $rest_namespace To change the namespace URL of REST API route. Default is wp/v2. @type string $rest_controller_class REST API Controller class name. Default is 'WP_REST_Terms_Controller'. @type bool $show_tagcloud Whether to list the taxonomy in the Tag Cloud Widget controls. If not set, the default is inherited from `$show_ui` (default true). @type bool $show_in_quick_edit Whether to show the taxonomy in the quick/bulk edit panel. It not set, the default is inherited from `$show_ui` (default true). @type bool $show_admin_column Whether to display a column for the taxonomy on its post type listing screens. Default false. @type bool|callable $meta_box_cb Provide a callback function for the meta box display. If not set, post_categories_meta_box() is used for hierarchical taxonomies, and post_tags_meta_box() is used for non-hierarchical. If false, no meta box is shown. @type callable $meta_box_sanitize_cb Callback function for sanitizing taxonomy data saved from a meta box. If no callback is defined, an appropriate one is determined based on the value of `$meta_box_cb`. @type string[] $capabilities { Array of capabilities for this taxonomy. @type string $manage_terms Default 'manage_categories'. @type string $edit_terms Default 'manage_categories'. @type string $delete_terms Default 'manage_categories'. @type string $assign_terms Default 'edit_posts'. } @type bool|array $rewrite { Triggers the handling of rewrites for this taxonomy. Default true, using $taxonomy as slug. To prevent rewrite, set to false. To specify rewrite rules, an array can be passed with any of these keys: @type string $slug Customize the permastruct slug. Default `$taxonomy` key. @type bool $with_front Should the permastruct be prepended with WP_Rewrite::$front. Default true. @type bool $hierarchical Either hierarchical rewrite tag or not. Default false. @type int $ep_mask Assign an endpoint mask. Default `EP_NONE`. } @type string|bool $query_var Sets the query var key for this taxonomy. Default `$taxonomy` key. If false, a taxonomy cannot be loaded at `?{query_var}={term_slug}`. If a string, the query `?{query_var}={term_slug}` will be valid. @type callable $update_count_callback Works much like a hook, in that it will be called when the count is updated. Default _update_post_term_count() for taxonomies attached to post types, which confirms that the objects are published before counting them. Default _update_generic_term_count() for taxonomies attached to other object types, such as users. @type string|array $default_term { Default term to be used for the taxonomy. @type string $name Name of default term. @type string $slug Slug for default term. Default empty. @type string $description Description for default term. Default empty. } @type bool $sort Whether terms in this taxonomy should be sorted in the order they are provided to `wp_set_object_terms()`. Default null which equates to false. @type array $args Array of arguments to automatically use inside `wp_get_object_terms()` for this taxonomy. @type bool $_builtin This taxonomy is a "built-in" taxonomy. INTERNAL USE ONLY! Default false. }
Returns:
  • (WP_Taxonomy|WP_Error) The registered taxonomy object on success, WP_Error object on failure.
Defined at:
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Description

Creates or modifies a taxonomy object.Note: Do not use before the {@see 'init'} hook. A simple function for creating or modifying a taxonomy object based on the parameters given. If modifying an existing taxonomy object, note that the `$object_type` value from the original registration will be overwritten.

Related Functions

unregister_taxonomy, is_taxonomy, get_taxonomy, register_meta, register_taxonomy_for_object_type

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