CPT, Taxonomy | Type: PHPRegister Custom Post Types and Taxonomies

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');

Reference Links

https://developer.wordpress.org/resource/dashicons/