Filters the arguments for registering a specific taxonomy.

Description

The dynamic portion of the filter name, $taxonomy, refers to the taxonomy key.

Possible hook names include:

• register_category_taxonomy_args
• register_post_tag_taxonomy_args

Parameters

$argsarray

Array of arguments for registering a taxonomy.
See the register_taxonomy() function for accepted arguments.

More Arguments from register_taxonomy( … $args )

Array or query string of arguments for registering a taxonomy.

• labels string[]
  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() .
• description string
  A short descriptive summary of what the taxonomy is for.
• public bool
  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.
• publicly_queryable bool
  Whether the taxonomy is publicly queryable.
  If not set, the default is inherited from $public
• hierarchical bool
  Whether the taxonomy is hierarchical. Default false.
• show_ui bool
  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).
• show_in_menu bool
  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).
• show_in_nav_menus bool
  Makes this taxonomy available for selection in navigation menus. If not set, the default is inherited from $public (default true).
• show_in_rest bool
  Whether to include the taxonomy in the REST API. Set this to true for the taxonomy to be available in the block editor.
• rest_base string
  To change the base url of REST API route. Default is $taxonomy.
• rest_namespace string
  To change the namespace URL of REST API route. Default is wp/v2.
• rest_controller_class string
  REST API Controller class name. Default is ‘WP_REST_Terms_Controller‘.
• show_tagcloud bool
  Whether to list the taxonomy in the Tag Cloud Widget controls. If not set, the default is inherited from $show_ui (default true).
• show_in_quick_edit bool
  Whether to show the taxonomy in the quick/bulk edit panel. It not set, the default is inherited from $show_ui (default true).
• show_admin_column bool
  Whether to display a column for the taxonomy on its post type listing screens. Default false.
• meta_box_cb bool|callable
  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.
• meta_box_sanitize_cb callable
  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.
• capabilities string[]
  Array of capabilities for this taxonomy.

  • manage_terms string
    Default 'manage_categories'.
  • edit_terms string
    Default 'manage_categories'.
  • delete_terms string
    Default 'manage_categories'.
  • assign_terms string
    Default 'edit_posts'.
    
  • rewrite bool|array
    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:

    • slug string
      Customize the permastruct slug. Default $taxonomy key.
    • with_front bool
      Should the permastruct be prepended with WP_Rewrite::$front. Default true.
    • hierarchical bool
      Either hierarchical rewrite tag or not. Default false.
    • ep_mask int
      Assign an endpoint mask. Default EP_NONE.
      
    • query_var string|bool
      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.
    • update_count_callback callable
      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.
    • default_term string|array
      Default term to be used for the taxonomy.

      • name string
        Name of default term.
      • slug string
        Slug for default term.
      • description string
        Description for default term.
        
      • sort bool
        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.
      • args array
        Array of arguments to automatically use inside wp_get_object_terms() for this taxonomy.
      • _builtin bool
        This taxonomy is a "built-in" taxonomy. INTERNAL USE ONLY! Default false.
      $taxonomystring
      Taxonomy key.
      $object_typestring[]
      Array of names of object types for the taxonomy.

      Source

      $args = apply_filters( "register_{$taxonomy}_taxonomy_args", $args, $this->name, (array) $object_type );
      

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      Changelog

      Version	Description
      6.0.0	Introduced.

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