Custom Post Type, Taxonomy & Rewrite rules for slug

customposts.php

/**
 * create_news_post_type function. Create a News post type.
 * 
 * @access public
 * @return void
 */
 
// POSTTYPES.PHP
function create_news_post_type() {
    $labels = array(
        'name'               => _x( 'News', 'post type general name' ),
        'singular_name'      => _x( 'News', 'post type singular name' ),
        'menu_name'          => _x( 'News', 'admin menu' ),
        'name_admin_bar'     => _x( 'News', 'add new on admin bar' ),
        'add_new'            => _x( 'Add New', 'News' ),
        'add_new_item'       => __( 'Add New News' ),
        'new_item'           => __( 'New News' ),
        'edit_item'          => __( 'Edit News' ),
        'view_item'          => __( 'View News' ),
        'all_items'          => __( 'All News' ),
        'search_items'       => __( 'Search News' ),
        'parent_item_colon'  => __( 'Parent News:' ),
        'not_found'          => __( 'No news found.' ),
        'not_found_in_trash' => __( 'No news found in Trash.' ),
    );

    $args = array(
        'labels'             => $labels,
        'public'             => true,
        'publicly_queryable' => true,
        'show_ui'            => true,
        'show_in_menu'       => true,
        'query_var'          => true,
        'rewrite'            => array( 'slug' => 'news' ),
        'capability_type'    => 'post',
        'has_archive'        => true,
        'hierarchical'       => false,
        'menu_position'      => null,
        'supports'           => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'comments' )
    );

    register_post_type( 'news', $args );
}
add_action( 'init', 'create_news_post_type' );


// POSTTYPES.PHP
// Next - Custom Taxonomy with Rewrite slug same as CPT

/**
 * create_news_type_taxonomies function. Creates Type of News Taxonomy for taggin news.
 * 
 * @access public
 * @return void
 */
function create_news_type_taxonomies() {
    // Add new taxonomy, make it hierarchical (like categories)
    $labels = array(
        'name'              => _x( 'Types of News', 'taxonomy general name' ),
        'singular_name'     => _x( 'Types of New', 'taxonomy singular name' ),
        'search_items'      => __( 'Search Type of News' ),
        'all_items'         => __( 'All Types of News' ),
        'parent_item'       => __( 'Parent Types of News' ),
        'parent_item_colon' => __( 'Parent Types of News:' ),
        'edit_item'         => __( 'Edit Type of News' ),
        'update_item'       => __( 'Update Type of News' ),
        'add_new_item'      => __( 'Add New Type of News' ),
        'new_item_name'     => __( 'New Type of News Name' ),
        'menu_name'         => __( 'Type of News' ),
    );

    $args = array(
        'hierarchical'      => true,
        'labels'            => $labels,
        'show_ui'           => true,
        'show_admin_column' => true,
        'query_var'         => true,
        'rewrite'           => array( 'slug' => 'news' ),
    );

    register_taxonomy( 'news_type', array( 'news' ), $args );
}//*/
add_action( 'init', 'create_news_type_taxonomies', 0 );


// FUNCTIONS.PHP
// New function that changes the way permalinks are saved in the post edit form so that news post will be saved with a url like www.mysite.com/news/new_type/post-slug. This function uses the post_type_link hook.

/**
 * rewrite_news_post_links function. Adds rule to rewrite post permalinks when saved.
 * 
 * @access public
 * @param mixed $post_link
 * @param int $id (default: 0)
 * @return void
 */
function rewrite_news_post_links( $post_link, $id = 0 ) {

    $post = get_post($id);
     // checks to see that there is a post and that it is a "news" post type.
    if ( is_wp_error($post) || 'news' != $post->post_type || empty($post->post_name) )
        return $post_link;

    // Get the news_type taxonomy associated with the post:
    $terms = get_the_terms($post->ID, 'news_type');

    if( is_wp_error($terms) || !$terms ) {
         //if you change the initial taxonomy to all you can replace 'uncategorize'd with "all"
         $news_type = 'uncategorized';
    }
    else {
        $news_type_obj = array_pop($terms);
        // if news post type has news_type taxonomy get the taxonomy slug
        $news_type = $news_type_obj->slug;
    }
    // returns permalink in the form of /news/news-type-taxonomy-word/post-slug
    return home_url(user_trailingslashit( "news/$news_type/$post->post_name" ));
}
add_filter( 'post_type_link', 'rewrite_news_post_links' , 10, 2 );//*/


// FUNCTIONS.PHP
// rewrite rule that will allow wordpress to parse a url with the structure www.mysite.com/news/news_type/post-slug and return a post of the news post type with a matching taxonomy word and post slug.

/**
 * rewrite_rules function.
 * 
 * @access public
 * @return void
 */
function rewrite_rules() {
    //adds rewrite rule so wordpress will recognize /news/anything/anything
    add_rewrite_rule("^news/([^/]+)/([^/]+)/?",'index.php?post_type=news&news_type=$matches[1]&news=$matches[2]','top');
}
add_action('init', 'rewrite_rules');