PHP: WordPress Custom Post Types Dynamic

custom_posts.php

<?php // requires php5.3
function add_post_type( $name, $args = array() ) {
	add_action( 'init', function() use( $name, $args ) {
		
		$upper  = ucwords( str_replace( '_', ' ', $name ) );
		$lower  = strtolower( str_replace( '_', ' ', $name ) );
		$name   = strtolower( str_replace( ' ', '_', $name ) );
		$labels = array(
			'name'               => _x( $upper . 's', $name ),
			'singular_name'      => _x( $upper, $name ),
			'add_new_item'       => _x( "Add New $upper", $name ),
			'edit_item'          => _x( "Edit $upper", $name ),
			'new_item'           => _x( "New $upper", $name ),
			'view_item'          => _x( "View $upper", $name ),
			'search_items'       => _x( "Search $upper" . 's', $name ),
			'not_found'          => _x( "No $lower" . 's found', $name ),
			'not_found_in_trash' => _x( "No $lower" . 's found in Trash', $name ),
			'parent_item_colon'  => _x( "Parent $upper:", $name ),
			'menu_name'          => _x( "$upper" . 's', $name )
		);

		$args = array_merge(
			array(
				'public'      => true,
				'labels'      => $labels,
				'supports'    => array( 'title', 'editor', 'excerpt', 'thumbnail' ),
				'has_archive' => true,
				'rewrite'     => array( 'slug' => "$name" . 's' )
			),
			$args
		);

		register_post_type( $name, $args );
	});
}


function add_taxonomy( $name, $post_type, $args = array() ) {
	add_action( 'init', function() use( $name, $post_type, $args ) {

		$name = strtolower( str_replace( ' ', '_', $name ) );
		$args = array_merge(
			array(
				'label' => ucwords( str_replace( '_', ' ', $name ) )
			),
			$args
		);

		register_taxonomy( $name, $post_type, $args );
	});
}


// now add post types and taxonomies from functions.php
add_post_type ( 'movie', array(
	'supports' => array( 'title', 'editor', 'excerpt', 'thumbnail', 'revisions' )
));
add_taxonomy( 'genre', 'movie' );