Get the Registered Taxonomies

There will be times when you need to grab all the registered taxonomies. Using the WordPress construct get_taxonomies(), you can specify what you want. For example, you fetch all of the custom taxonomies, built-in ones, or all of them. In this episode, you’ll work with this instruction and go into WordPress core to see what it does for you.

Using the get_taxonomies(), you and I can dive deeper into the configuration of each of the built-in taxonomies. Let’s build some code and then see the different options and explore the built-ins. You’ll discover that there are 5 different built-in taxonomies out-of-the-box with WordPress:

1. category
2. post_tag
3. nav_menu
4. link_category
5. post_format

You and I will look at the configuration of each of these.

Menu Taxonomy and Terms

You’ll discover that the Navigation Menu is a taxonomy, the specific menu that you create in the WordPress back-end is a term, and the individual menu item is a post. Did I just blow your mind?

Get Built-in Only, Custom Taxonomies, or All of Them

The _builtin parameter lets you specify whether you want to receive all of the taxonomies, only the built-in ones, or only the custom ones. You configure it like this:

• All Taxonomies – don’t include the _builtin parameter
• Built-in Only: '_builtin' => true
• Custom Only: '_builtin' => false

Want the code used in this episode?

	add_action( 'init', __NAMESPACE__ . '\test_getting_taxonomies', 9999 );
	function test_getting_taxonomies() {
	register_taxonomy('genre', 'post', array(
	'label' => 'Genre',
	'hierarchical' => true,
	));
	register_taxonomy_for_object_type( 'category', 'page' );
	if ( is_admin() ) {
	return;
	}
	$args = array(
	// '_builtin' => true,
	);
	$taxonomies = get_taxonomies( $args, 'objects' );
	ddd( $taxonomies );
	}

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