WordPress でカスタム投稿タイプを簡単に拡張できるようにするコード

class wbCustom
{
    function custom_post_type($title, $slug, $supports, $capability_type = 'post', $menu_position = 30)
    {
        $args = Array(
            'labels' => Array(
                'name' => _x($title, 'post type general name'),
                'singular_name' => _x($title, 'post type singular name'),
                'add_new' => _x($title . 'を追加', 'book'),
                'add_new_item' => __('新しい' . $title . 'を追加'),
                'edit_item' => __($title . 'を編集'),
                'new_item' => __('新しい' . $title),
                'view_item' => __($title . 'を編集'),
                'search_items' => __($title . 'を探す'),
                'not_found' =>  __($title . 'はありません'),
                'not_found_in_trash' => __('ゴミ箱に' . $title . 'はありません'),
                'parent_item_colon' => ''
            ),
            'public' => true,
            'publicly_queryable' => true,
            'show_ui' => true,
            'query_var' => true,
            'rewrite' => true,
            'capability_type' => $capability_type,
            'hierarchical' => false,
            'menu_position' => $menu_position,
            'has_archive' => true,
            'supports' => $supports
        );
        register_post_type($slug, $args);
    }
 
    function custom_taxonomies($taxName, $taxSlug, $postType) {
        register_taxonomy(
            $taxSlug,
            $postType,
            array(
                'hierarchical' => true,
                'label' => $taxName,
                'singular_name' => $taxName,
                'query_var' => true,
                'rewrite' => true
            )
        );
    }
 
    function custom_post_dashboard($custom_post_type)
    {
        global $wp_post_types;
        $num_post_type = wp_count_posts($custom_post_type);
        $num = number_format_i18n($num_post_type->publish);
        $text = _n( $wp_post_types[$custom_post_type]->labels->singular_name, $wp_post_types[$custom_post_type]->labels->name, $num_post_type->publish );
        $capability = $wp_post_types[$custom_post_type]->cap->edit_posts;
 
        if (current_user_can($capability)) {
            $num = "<a href='edit.php?post_type=" . $custom_post_type . "'>$num</a>";
            $text = "<a href='edit.php?post_type=" . $custom_post_type . "'>$text</a>";
        }
 
        echo '<tr>';
        echo '<td class="first b b_' . $custom_post_type . '">' . $num . '</td>';
        echo '<td class="t ' . $custom_post_type . '">' . $text . '</td>';
        echo '</tr>';
    }
}

function custom_post_type_set()
{
    wbCustom::custom_post_type('お知らせ', 'info', Array('title', 'editor'));
    wbCustom::custom_post_type('製品情報', 'item', Array('title', 'editor'));
    wbCustom::custom_post_type('スタッフ', 'staff', Array('title', 'editor'));
}
add_action('init', 'custom_post_type_set');

function custom_taxonomies_set()
{
    wbCustom::custom_taxonomies('色', 'color', 'item');
    wbCustom::custom_taxonomies('サイズ', 'size', 'item');
}
add_action('init', 'custom_taxonomies_set', 0);

function custom_post_dashboard_set()
{
    wbCustom::custom_post_dashboard('info');
    wbCustom::custom_post_dashboard('item');
    wbCustom::custom_post_dashboard('staff');
}
add_action('right_now_content_table_end', 'custom_post_dashboard_set');