WordPress - Add new post type

functions.php

<?php
add_action('init','register_new_post_type');
function register_new_post_type(){
    $args = array(
        'label' => 'New Type',
        'show_ui' => true,
        'supports' => array( 'title', 'editor', 'thumbnail' ),
        'public' => true,
        'hierarchical' => true,
        'has_archive' => true
    );
    register_post_type('new_post_type',$args);
}