Wordpress_Custom_Post_Types.php

<?php
/**
 * Plugin Name: p47 Custom Post Types
 * Plugin URI: http://point47.com
 * Description: Demo for custom Post types
 * Version: 1.0
 * Author: Sorin Gitlan
 * Author URI: http://point47.com
 */

class P47_Movies_Post_Type{

    public function __construct(){

        $this->register_post_type();
        $this->taxonomies();
        $this->metaboxes();

    }


    /**
     * 
     * POST TYPES
     * 
     */
    public function register_post_type(){

        $args = array(
            'labels' => array(
                'name' => 'Movies',
                'singular_name' => 'Movie',
                'add_new' => 'Add New Movie',
                'add_new_item' => 'Add New Movie',
                'edit_item' => 'Edit Item',
                'new_item' => 'Add New Item',
                'view_item' => 'View Movie',
                'search_items' => 'Search Movies',
                'not_found' => 'No Movies Found',
                'not_found_in_trash' => 'No Movies Found In Trash'
            ),
            'query_var' => 'movies',
            'rewrite' => array(
                'slug' => '/movies'
            ),
            'public' => true,
            'menu_position' => 5,
            'menu_icon' => admin_url() . 'images/media-button-video.gif',
            'supports' => array(
                'title',
                'thumbnail',
                'excerpt',
                //'editor',
                //'custom-fields',
            )
        );

        register_post_type( 'p47_movie', $args );
    }

    /**
     * 
     *  TAXONOMIES
     * 
     */
    public function taxonomies(){

        $taxonomies = array();

        $taxonomies['genre'] = array(
            'hierarchical' => true,
            'query_var' => 'movie_genre',
            'rewrite' => array( 'slug' => 'movies/genre' ),
            'labels' => array(
                'name' => 'Genre',
                'singular_name' => 'Genre',
                'edit_item' => 'Edit Genre',
                'update_item' => 'Update Genre',
                'add_new_item' => 'Add Genre',
                'new_item_name' => 'Add New Genre',
                'all_items' => 'All Genres',
                'search_items' => 'Search Genres',
                'popular_items' => 'Popular Genres',
                'separate_items_with_comments' => 'Separate Genres With Commas',
                'add_or_remove_items' => 'Add or Remove Genres',
                'chose_from_most_used' => 'Chose From Most Used Genres',
            ),
        );

        $taxonomies['studio'] = array(
            'hierarchical' => true,
            'query_var' => 'movie_studio',
            'rewrite' => array( 'slug' => 'movies/studios' ),
            'labels' => array(
                'name' => 'Studio',
                'singular_name' => 'Studio',
                'edit_item' => 'Edit Studio',
                'update_item' => 'Update Studio',
                'add_new_item' => 'Add Studio',
                'new_item_name' => 'Add New Studio',
                'all_items' => 'All Studios',
                'search_items' => 'Search Studios',
                'popular_items' => 'Popular Studios',
                'separate_items_with_comments' => 'Separate Studios With Commas',
                'add_or_remove_items' => 'Add or Remove Studios',
                'chose_from_most_used' => 'Chose From Most Used Studios',
            ),
        );

        $this->register_all_taxonomies($taxonomies);

    }

    public function register_all_taxonomies($taxonomies){

        foreach ($taxonomies as $name => $arr) {
            register_taxonomy( $name, array('p47_movie'), $arr );
        }

    }


    /**
     *
     *  META BOXES
     * 
     */
    public function metaboxes(){

        add_action( 'add_meta_boxes', function(){
            // css id, title, callback, page
            add_meta_box( 'p47_movie_length', 'Movie Length', 'movie_length', 'p47_movie');
        });

        function movie_length($post){
            
            $length = get_post_meta($post->ID, 'p47_movie_length', true); // single value

            ?>
            <p>
                <label for="p47_movie_length"> Length: </label>
                <input type="text" class="widefat" name="p47_movie_length" id="p47_movie_length" value="<?php echo esc_attr( $length ) ; ?>">
            </p>
            <?php
        }

        add_action( 'save_post', function( $id ){
            if( isset($_POST['p47_movie_length']) ){
                update_post_meta( $id, 'p47_movie_length', strip_tags($_POST['p47_movie_length']) );
            }
        });

    }


}

add_action('init', function(){
    new P47_Movies_Post_Type();
});