父页面列表

页面属性元框由page\\u attributes\\u meta\\u box（）创建，它使用wp\\u dropdown\\u pages（）、wp\\u dropdown\\u pages（），然后使用get\\u pages（）加载页面以创建选项如果我理解正确，您希望添加原始post type Page 自定义帖子类型父列表。以下方法可以将任何其他帖子类型添加到不同的帖子类型。示例显示的是添加Page.

add_filter( \'get_pages\', \'ws361150_add_page_to_parent_list\', 10, 2 );
function ws361150_add_page_to_parent_list( $post_type_pages, $parsed_args ) {
    // if this is not admin page, return, since get_page is used in also navigation list in frontend

    // avoid unnecessary rendering
    global $current_screen;

    // check to see if it is in edit post type page
    // you may specify the post type $specify_post_type, if add to all custom post types, just leave it blank, if add to certain post types, use preg_match instead of strpos

    $specify_post_type = \'\';

    if( empty( $current_screen ) || ! empty( $current_screen ) && is_bool( strpos( $current_screen->parent_file, "edit.php?post_type={$specify_post_type}" ) )  ) {
        return $post_type_pages;
    }

    // add Page\'s page list to current page list or any post types
    $additional_post_type = \'page\';
    $found_page = false;

    // *** because it is a filter, need to check if it is already merge, if not doing this, infinite loop will occur
    foreach ($post_type_pages as $key => $page) {
        if( $page->post_type === $additional_post_type ) {
            // var_dump(\'found\');
            $found_page = true;
            break; // no need to continue if found
        }
    }

    if( $found_page ) {
        return $post_type_pages;
    } else {
        // add page list to current post type pages
        $args = array(
            \'post_type\'        => \'page\',
            \'exclude_tree\'     => $_REQUEST[\'post\'],
        );

        $page_list = get_pages( $args ); // call again get_pages, the above test will return the page list without looping to add if it is already done

        $pages = array_merge( $page_list, $post_type_pages );
        // var_dump(\'add once\');

        return $pages;
    }
}