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taxonomy_exists( string $taxonomy ): bool

Determines whether the taxonomy name exists.

Description

Formerly is_taxonomy() , introduced in 2.3.0.

For more information on this and similar theme functions, check out the Conditional Tags article in the Theme Developer Handbook.

Parameters

$taxonomy string Required
Name of taxonomy object.

Return

bool Whether the taxonomy exists.

Source

File: wp-includes/taxonomy.php. View all references

function taxonomy_exists( $taxonomy ) {
	global $wp_taxonomies;

	return is_string( $taxonomy ) && isset( $wp_taxonomies[ $taxonomy ] );
}

Used By

Used By Description
unregister_taxonomy() wp-includes/taxonomy.php

Unregisters a taxonomy.
WP_Term::get_instance() wp-includes/class-wp-term.php

Retrieve WP_Term instance.
WP_Customize_Nav_Menu_Item_Setting::populate_value() wp-includes/customize/class-wp-customize-nav-menu-item-setting.php

Ensure that the value is fully populated with the necessary properties.
WP_Screen::get() wp-admin/includes/class-wp-screen.php

Fetches a screen object.
WP_Terms_List_Table::__construct() wp-admin/includes/class-wp-terms-list-table.php

Constructor.
_wp_ajax_menu_quick_search() wp-admin/includes/nav-menu.php

Prints the appropriate response to a menu quick search.
wp_list_categories() wp-includes/category-template.php

Displays or retrieves the HTML list of categories.
is_taxonomy() wp-includes/deprecated.php

Checks that the taxonomy name exists.
WP_Widget_Tag_Cloud::_get_current_taxonomy() wp-includes/widgets/class-wp-widget-tag-cloud.php

Retrieves the taxonomy for the current Tag cloud widget instance.
WP_Tax_Query::clean_query() wp-includes/class-wp-tax-query.php

Validates a single query.
wp_update_term() wp-includes/taxonomy.php

Updates term based on arguments provided.
wp_get_object_terms() wp-includes/taxonomy.php

Retrieves the terms associated with the given object(s), in the supplied taxonomies.
wp_set_object_terms() wp-includes/taxonomy.php

Creates term and taxonomy relationships.
wp_remove_object_terms() wp-includes/taxonomy.php

Removes term(s) associated with a given object.
wp_insert_term() wp-includes/taxonomy.php

Adds a new term to the database.
wp_count_terms() wp-includes/taxonomy.php

Counts how many terms are in taxonomy.
get_term_children() wp-includes/taxonomy.php

Merges all term children into a single array of their IDs.
get_term_by() wp-includes/taxonomy.php

Gets all term data from database by term field and data.
get_terms() wp-includes/taxonomy.php

Retrieves the terms in a given taxonomy or list of taxonomies.
get_taxonomy() wp-includes/taxonomy.php

Retrieves the taxonomy object of $taxonomy.
get_objects_in_term() wp-includes/taxonomy.php

Retrieves object IDs of valid taxonomy and term.
is_taxonomy_hierarchical() wp-includes/taxonomy.php

Determines whether the taxonomy object is hierarchical.
get_term() wp-includes/taxonomy.php

Gets all term data from database by term ID.
get_adjacent_post() wp-includes/link-template.php

Retrieves the adjacent post.
get_boundary_post() wp-includes/link-template.php

Retrieves the boundary post.
wp_get_nav_menu_items() wp-includes/nav-menu.php

Retrieves all menu items of a navigation menu.
wp_xmlrpc_server::wp_newTerm() wp-includes/class-wp-xmlrpc-server.php

Create a new term.
wp_xmlrpc_server::wp_editTerm() wp-includes/class-wp-xmlrpc-server.php

Edit a term.
wp_xmlrpc_server::wp_deleteTerm() wp-includes/class-wp-xmlrpc-server.php

Delete a term.
wp_xmlrpc_server::wp_getTerm() wp-includes/class-wp-xmlrpc-server.php

Retrieve a term.
wp_xmlrpc_server::wp_getTerms() wp-includes/class-wp-xmlrpc-server.php

Retrieve all terms for a taxonomy.
wp_xmlrpc_server::wp_getTaxonomy() wp-includes/class-wp-xmlrpc-server.php

Retrieve a taxonomy.

Changelog

Version Description
3.0.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/taxonomy_exists