Pristine Wordpress Custom Post Type (and Related Custom Taxonomy) Declaration

cpt_tax.php

<?php

function xyz_create_cpt_animal() {
	$label_singular = 'Animal';
	$label_plural = $label_singular . 's';
	
	$labels = array(
		'name' => __($label_plural),
		'singular_name' => __($label_singular),
		'add_new' => __('Add New'),
		'add_new_item' => __('Add New ' . $label_singular),
		'edit_item' => __('Edit ' . $label_singular),
		'new_item' => __('New ' . $label_singular),
		'all_items' => __('All ' . $label_plural),
		'view_item' => __('View ' . $label_singular),
		'search_items' => __('Search ' . $label_plural),
		'not_found' => __( 'No ' . $label_plural . ' found'),
		'not_found_in_trash' => __('No ' . $label_plural . ' found in Trash'),
		'parent_item_colon' => __(''),
		'menu_name' => __($label_plural)
	);

	$args = array(
		'labels' => $labels,
		'public' => true,
		'has_archive' => true,
		'hierarchical' => false,
		// 'rewrite' => array( 'with_front' => false, 'slug' => 'animal' ),
		// 'show_in_menu' => true,
		// 'menu_position' => 5,
		'menu_icon' => 'dashicons-portfolio', // via http://melchoyce.github.io/dashicons/
		'supports' => array(
				'title',
				'editor',
				// 'author',
				// 'thumbnail',
				// 'excerpt',
				// 'trackbacks',
				// 'custom-fields',
				// 'comments',
				// 'post-formats',
				'revisions',
				'page-attributes'
			)
	);
	register_post_type( 'animal', $args ); // Singular! Underscores!
}
add_action( 'init', 'xyz_create_cpt_animal' );

function xyz_create_tax_species() {
	$label_singular = 'Program Area';
	$label_plural = $label_singular . 's';

	$labels = array(
		'name'                       => __($label_plural),
		'singular_name'              => __($label_singular),
		'search_items'               => __('Search ' . $label_plural),
		'popular_items'              => __('Popular ' . $label_plural),
		'all_items'                  => __('All ' . $label_plural),
		'parent_item'                => null,
		'parent_item_colon'          => null,
		'edit_item'                  => __('Edit ' . $label_singular),
		'update_item'                => __('Update ' . $label_singular),
		'add_new_item'               => __('Add New ' . $label_singular),
		'new_item_name'              => __('New ' . $label_singular . ' Name'),
		'separate_items_with_commas' => __('Separate ' . $label_plural . ' with commas'),
		'add_or_remove_items'        => __('Add or remove ' . $label_plural),
		'choose_from_most_used'      => __('Choose from the most used ' . $label_plural),
		'not_found'                  => __('No ' . $label_plural . ' found.'),
		'menu_name'                  => __($label_plural),
	);
	$post_types = array(
		'animal'
	);

	$args = array(
		'labels' => $labels,
		'hierarchical' => true,
		// 'rewrite' => array( 'slug' => 'species' ),
		// 'sort' => true,
		'query_var' => true,
	);
	register_taxonomy( 'program_areas', $post_types, $args ); // Plural! Underscores!
}
add_action( 'init', 'xyz_create_tax_species', 0 );