在WordPress中注册新用户时，如何添加自定义帖子类型？

function custom_post_type() {
    $labels = array(
        'name'               => '自定义帖子类型',
        'singular_name'      => '自定义帖子类型',
        'menu_name'          => '自定义帖子类型',
        'name_admin_bar'     => '自定义帖子类型',
        'add_new'            => '添加新帖子',
        'add_new_item'       => '添加新帖子',
        'new_item'           => '新帖子',
        'edit_item'          => '编辑帖子',
        'view_item'          => '查看帖子',
        'all_items'          => '所有帖子',
        'search_items'       => '搜索帖子',
        'parent_item_colon'  => '父级帖子:',
        'not_found'          => '未找到帖子。',
        'not_found_in_trash' => '回收站中未找到帖子。'
    );

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

    register_post_type( 'custom_post_type', $args );
}
add_action( 'init', 'custom_post_type' );