Example shows how to register a CPT and taxonomies.
if (!function_exists('sfcc_custom_posts')) {
// Register Custom Post Type
function sfcc_custom_posts() {
// OFFICES AND DEPARTMENTS
$labels = array(
'name' => _x('Offices and Departments', 'Post Type General Name', 'sfcc'),
'singular_name' => _x('Office', 'Post Type Singular Name', 'sfcc'),
'menu_name' => __('Offices', 'sfcc'),
'name_admin_bar' => __('Offices', 'sfcc'),
'archives' => __('Office Archive', 'sfcc'),
'parent_item_colon' => __('Parent Item:', 'sfcc'),
'all_items' => __('All Offices', 'sfcc'),
'add_new_item' =>; __('Add New Office', 'sfcc'),
'add_new' => __('Add New', 'sfcc'),
'new_item' => __('New Office', 'sfcc'),
'edit_item' => __('Edit Office', 'sfcc'),
'update_item' => __('Update Office', 'sfcc'),
'view_item' => __('View Office', 'sfcc'),
'search_items' => __('Search Office', 'sfcc'),
'not_found' => __('Not found', 'sfcc'),
'not_found_in_trash' => __('Not offices found in Trash', 'sfcc'),
'featured_image' => __('Featured Image', 'sfcc'),
'set_featured_image' => __('Set featured image', 'sfcc'),
'remove_featured_image' => __('Remove featured image', 'sfcc'),
'use_featured_image' => __('Use as featured image', 'sfcc'),
'insert_into_item' => __('Insert', 'sfcc'),
'uploaded_to_this_item' => __('Uploaded to this item', 'sfcc'),
'items_list' => __('Items list', 'sfcc'),
'items_list_navigation' => __('Items list navigation', 'sfcc'),
'filter_items_list' => __('Filter items list', 'sfcc'),
);
$args = array(
'label' => __('Office', 'sfcc'),
'description' => __('SFCC offices, academic schools departments, etc.', 'sfcc'),
'labels' => $labels,
'supports' => array('title', 'editor', 'thumbnail', 'revisions', 'custom-fields',),
'taxonomies' => array('office_category'),
'hierarchical' => TRUE,
'public' => TRUE,
'show_ui' => TRUE,
'show_in_menu' => TRUE,
'menu_position' => 20,
'menu_icon' => 'dashicons-groups',
'show_in_admin_bar' => TRUE,
'show_in_nav_menus' => TRUE,
'can_export' => TRUE,
'has_archive' => TRUE,
'exclude_from_search' => FALSE,
'publicly_queryable' => TRUE,
'capability_type' => 'page',
);
register_post_type('office', $args);
add_action('init', 'sfcc_custom_posts', 0);
}
if (!function_exists('sfcc_taxonomies')) {
// Register Custom Taxonomies
function sfcc_taxonomies() {
register_taxonomy('person_category', array('person'), $args);
$labels = array(
'name' => _x('Office Categories', 'Taxonomy General Name', 'sfcc'),
'singular_name' => _x('Office Category', 'Taxonomy Singular Name', 'sfcc'),
'menu_name' => __('Office Category', 'sfcc'),
'all_items' => __('All Office Categories', 'sfcc'),
'parent_item' => __('Parent Office Category', 'sfcc'),
'parent_item_colon' => __('Parent Office Category:', 'sfcc'),
'new_item_name' => __('New Office Category Name', 'sfcc'),
'add_new_item' => __('Add New Office Category', 'sfcc'),
'edit_item' => __('Edit Office Category', 'sfcc'),
'update_item' => __('Update Office Category', 'sfcc'),
'view_item' => __('View Office Category', 'sfcc'),
'separate_items_with_commas' => __('Separate items with commas', 'sfcc'),
'add_or_remove_items' => __('Add or remove items', 'sfcc'),
'choose_from_most_used' => __('Choose from the most used', 'sfcc'),
'popular_items' => __('Popular Items', 'sfcc'),
'search_items' => __('Search Office Categories', 'sfcc'),
'not_found' => __('Not Found', 'sfcc'),
'no_terms' => __('No items', 'sfcc'),
'items_list' => __('Items list', 'sfcc'),
'items_list_navigation' => __('Items list navigation', 'sfcc'),
);
$args = array(
'labels' => $labels,
'hierarchical' => TRUE,
'public' => TRUE,
'show_ui' => TRUE,
'show_admin_column' => TRUE,
'show_in_nav_menus' => TRUE,
'show_tagcloud' => TRUE,
'rewrite' => array(
'slug' => 'office-category',
'with_front' => TRUE,
'hierarchical' => TRUE,
),
);
}
register_taxonomy('office_category', array('office'), $args);
add_action('init', 'sfcc_taxonomies', 0);
}
// add categories for attachments
function sfcc_add_categories_for_attachments() {
register_taxonomy_for_object_type('category', 'attachment');
}
add_action('init', 'sfcc_add_categories_for_attachments');
// add tags for attachments
function sfcc_add_tags_for_attachments() {
register_taxonomy_for_object_type('post_tag', 'attachment');
}
add_action('init', 'sfcc_add_tags_for_attachments'); 
