Taxonomies

Custom taxonomies could be found inside inventor/includes/taxonomies folder. Before you start working with taxonomies, make sure that you are familiar with all nuances of register_taxonomy function.

Adding new taxonomy to listing

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add_action( 'init', 'my_custom_taxonomy', 11 );
add_action( 'parent_file', 'menu', 11 );
add_action( 'admin_menu', 'admin_menu', 11 );

function my_custom_taxonomy() {
    $custom_taxonomy_labels = array(
        'name'              => __( 'Custom Taxonomies', 'domain' ),
        'singular_name'     => __( 'Custom Taxonomy', 'domain' ),
        'search_items'      => __( 'Search Custom Taxonomy', 'domain' ),
        'all_items'         => __( 'All Custom Taxonomies', 'domain' ),
        'parent_item'       => __( 'Parent Custom Taxonomy', 'domain' ),
        'parent_item_colon' => __( 'Parent Custom Taxonomy:', 'domain' ),
        'edit_item'         => __( 'Edit Custom Taxonomy', 'domain' ),
        'update_itm'        => __( 'Update Custom Taxonomy', 'domain' ),
        'add_new_item'      => __( 'Add New Custom Taxonomy', 'domain' ),
        'new_item_name'     => __( 'New Custom Taxonomy', 'domain' ),
        'menu_name'         => __( 'Custom Taxonomies', 'domain' ),
    );

    register_taxonomy( 'custom_taxonomies', Inventor_Post_Types::get_listing_post_types    array    (
        'labels'            => $custom_taxonomy_labels,
        'hierarchical'      => true,
        'query_var'         => 'custom-taxonomy',
        'rewrite'           => array( 'slug' => __( 'custom-taxonomy', 'domain' ) ),
        'public'            => true,
        'show_ui'           => true,
        'show_admin_column' => true,
    ) );
}

function menu( $parent_file ) {
    global $current_screen;
    $taxonomy = $current_screen->taxonomy;

    if ( 'custom_taxonomies' == $taxonomy ) {
        return 'lexicon';
    }

    return $parent_file;
}

function admin_menu( $parent_file ) {
    add_submenu_page(
        'lexicon',
        __( 'Custom Taxonomies', 'domain' ),
        __( 'Custom Taxonomies', 'domain' ),
        'edit_posts',
        'edit-tags.php?taxonomy=custom_taxonomies',
        false
    );
}

Removing taxonomy

All taxonomies definition are wrapped in init hooks so it is easy to remove custom taxonomy only by defining remove_action(). Below you can see example how to remove colors taxonomy.

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remove_action( 'init', array( 'Inventor_Taxonomy_Colors', 'definition' ) );

Changing taxonomy slug

To change already existing taxonomy, you need to remove it at first and then register it again using approaches above.