Why is my working Custom Taxonomy not in get_taxonomies array?

I’ve created a custom taxonomy. It’s working just as expected, aside from it is not showing in the get_taxonomies array. get_terms function returns an invalid taxonomy error.

I want to use get_terms to loop through the Double India Pale Ales and print each name for a select box.

Here is the code used to register it.

add_action( 'init', 'double_ipa_init' );

function double_ipa_init()  {
    register_taxonomy(
        'double-ipa',
        array (
            0 => 'post',
            1 => 'page',
        ),
        array(
            'hierarchical' => true,
            'label' => 'Double IPAs',
            'show_ui' => true,
            'query_var' => true,
            'rewrite' => array(
                'slug' => 'double-ipa'
            ),
        'singular_label' => 'Double IPA'
        )
    );
}

This code is in a plugin, and is on Multisite.

Thanks in advance for your help.

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

The Invalid Taxonomy error will be raised by the function get_terms(). You’re registring your taxonomy on the init action hook. Therefore you have to call your get_terms() function on the same or a later hook.

Try this snippet. It should display all term names of your taxonomy, regardless if the term is empty.

add_action('init', 'wpse29164_registerTaxonomy');
function wpse29164_registerTaxonomy() {
    $args = array(
        'hierarchical' => true,
        'label' => 'Double IPAs',
        'show_ui' => true,
        'query_var' => true,
        'rewrite' => array(
            'slug' => 'double-ipa'
        ),
        'singular_label' => 'Double IPA'
    );

    register_taxonomy('double-ipa', array('post', 'page'), $args);

    $terms = get_terms('double-ipa', array('hide_empty' => false));
    foreach ($terms as $term) {
        echo $term->name;
    }
}

Method 2

You’re looking to use get_terms() before ‘Init’ action hook.

Here’s the order of the hooks run in a typical request:

muplugins_loaded
registered_taxonomy
registered_post_type
plugins_loaded
sanitize_comment_cookies
setup_theme
load_textdomain
after_setup_theme
auth_cookie_malformed
auth_cookie_valid
set_current_user
**init**
widgets_init
register_sidebar
wp_register_sidebar_widget
wp_default_scripts
wp_default_stypes
admin_bar_init
add_admin_bar_menus
wp_loaded
parse_request
send_headers
parse_query
pre_get_posts
posts_selection
wp
template_redirect
get_header
wp_head
wp_enqueue_scripts
wp_print_styles
wp_print_scripts

Method 3

I got the same issue before, but using WP_Term_Query helped me retrieve what i needed give it a try it should work.
More details here :
https://developer.wordpress.org/reference/classes/WP_Term_Query/__construct/


All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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