[WP CPT + Taxonomy + Meta Boxes] Example Wordpress Custom Post Type with Taxonomy and Meta Boxes #wordpress

cpt-tax.php

<?php

// Sedi Custom Post Type
class Sedi_Cpt {

    public function __construct()
    {
        add_action( 'init', array( $this, 'build_custom_post_type' ), 0 );
        add_action( 'init', array( $this, 'build_aree_taxonomy' ), 0 );
        add_action( "add_meta_boxes", array( $this, "build_meta_boxes" ) );
    }

    function build_custom_post_type() {

        $labels = array(
            'singular_name'         => 'Sede',
            'menu_name'             => 'Sedi',
            'all_items'             => 'Tutte le Sedi',
            'add_new_item'          => 'Aggiungi Nuova Sede',
            'add_new'               => 'Aggiungi Sede',
            'new_item'              => 'Nuova Sede',
            'edit_item'             => 'Modifica Sede',
            'view_item'             => 'Vedi Sede',
            'search_items'          => 'Cerca Sede',
            'not_found'             => 'Sedi non trovate',
            'not_found_in_trash'    => 'Sedi non trovate nel cestino',
        );

        $args = array(
            'label'               => 'Sedi',
            'description'         => 'Sedi',
            'labels'              => $labels,
            'supports'            => array( 'title', 'editor', 'excerpt', 'author', 'thumbnail', 'revisions', 'custom-fields'),
            'public'              => true,
            'hierarchical'        => false,
            'show_ui'             => true,
            'show_in_menu'        => true,
            'show_in_nav_menus'   => true,
            'show_in_admin_bar'   => true,
            'has_archive'         => true,
            'can_export'          => true,
            'exclude_from_search' => false,
            'yarpp_support'       => true,
            'taxonomies' 	      => array('aree'),
            'publicly_queryable'  => true,
            'capability_type'     => 'page'
        );
        register_post_type( 'sedi', $args );
    }

    function build_aree_taxonomy()
    {
        $labels = array(
            'name' => 'Aree',
            'singular_name' => 'Aree',
            'search_items' =>  'Cerca Area',
            'all_items' => 'Tutte le Aree',
            'edit_item' => 'Modifica Area',
            'update_item' => 'Aggiorna Area',
            'add_new_item' => 'Aggiungi Nuova Area',
            'new_item_name' => 'Nome Nuova Area',
            'menu_name' => 'Aree',
        );

        register_taxonomy('aree', array('sedi'), array(
            'hierarchical' => true,
            'labels' => $labels,
            'show_ui' => true,
            'show_admin_column' => true,
            'query_var' => true,
            'rewrite' => array( 'slug' => 'area' ),
        ));
    }

    function town_meta_box_markup()
    {

    }

    function region_meta_box_markup()
    {

    }

    function build_meta_boxes()
    {
        add_meta_box('region-meta-box', 'Regione', 'regione_meta_box_markup', 'sedi', 'side', 'low', null);
        add_meta_box("town-meta-box", "Città", "town_meta_box_markup", "sedi", "side", "low", null);
    }

}

new Sedi_Cpt();