我已经注册了一个自定义帖子类型“book”和一个分类法“authors”，如下所示：

add_action( \'init\', \'post_book_init\' );

function post_book_init() {

    $labels = array(
        \'name\'               => \'BOOKs\',
        \'singular_name\'      => \'BOOK\',
        \'menu_name\'          => \'BOOKs\',
        \'name_admin_bar\'     => \'BOOK\',
        \'add_new\'            => \'Add New\',
        \'add_new_item\'       => \'Add New BOOK\',
        \'new_item\'           => \'New BOOK\',
        \'edit_item\'          => \'Edit BOOK\',
        \'view_item\'          => \'View BOOK\',
        \'all_items\'          => \'All BOOKs\',
        \'search_items\'       => \'Search BOOKs\',
        \'parent_item_colon\'  => \'Parent BOOKs\',
        \'not_found\'          => \'No BOOK found.\',
        \'not_found_in_trash\' => \'No BOOK found in Trash.\'
    );

    $args = array(
        \'labels\'             => $labels,
        \'taxonomies\'         => array(\'authors\'),       
        \'public\'             => true,
        \'publicly_queryable\' => true,
        \'show_ui\'            => true,
        \'show_in_menu\'       => true,
        \'query_var\'          => true,
        \'rewrite\'            => false,  
        \'with_front\' => false,      
        \'capability_type\'    => \'post\',
        \'has_archive\'        => \'bookarchives\',
        \'hierarchical\'       => false,
        \'menu_position\'      => null,
        \'supports\'           => array( \'title\', \'editor\', \'author\', \'thumbnail\', \'excerpt\', \'trackbacks\',\'custom-fields\',\'comments\',\'revisions\',\'page-attributes\',\'post-formats\' )
    );
    register_post_type(\'book\', $args );

$labels = array(
        \'name\'              => \'Authors\',
        \'singular_name\'     => \'Author\',
        \'search_items\'      => \'Search Author\',
        \'all_items\'         => \'All Authors\',
        \'parent_item\'       => \'Parent Author\',
        \'parent_item_colon\' => \'Parent Author:\',
        \'edit_item\'         => \'Edit Author\',
        \'update_item\'       => \'Update Author\',
        \'add_new_item\'      => \'Add New Author\',
        \'new_item_name\'     => \'New Author Name\',
        \'menu_name\'         => \'Author\'
    );

    $args = array(
        \'hierarchical\'      => true,
        \'labels\'            => $labels,
        \'show_ui\'           => true,
        \'show_admin_column\' => true,
        \'show_in_nav_menus\' => true,
        \'query_var\'         => true,
        \'rewrite\'           => array( \'slug\' => \'authors\' ),
    );

    register_taxonomy(\'authors\', \'book\', $args );

        global $wp_rewrite;
    $book_structure = \'/book/%authors%/%book%-blah-blah-blah\';
$wp_rewrite->add_rewrite_tag("%book%", \'([^/]+)\', "book=");
$wp_rewrite->add_permastruct(\'book\', $book_structure, false);

    unset($labels);
    unset($args);
}

我想在permalink中使用分类术语，并在注册post&；后应用重写规则；分类学并使用以下代码替换了分类术语：

add_filter(\'post_type_link\', \'author_permalink_structure\', 10, 4);
function author_permalink_structure($post_link, $post, $leavename, $sample) {
    if (false !== strpos($post_link, \'%authors%\')) {
        $author_type_term = get_the_terms($post->ID, \'authors\');
        if (!empty($author_type_term))
        {
            $author_slug = array_pop($author_type_term)->slug;
            $parent_slug=get_term(get_term_by(\'slug\',$author_slug,\'authors\')->parent,\'authors\')->slug;
            $post_link = str_replace(\'%authors%\', $author_slug, $post_link);
        }
        else
            $post_link = str_replace(\'%authors%\', \'uncategorized\', $post_link);
    }
    return $post_link;
}

因此，以下链接可以很好地工作：localhost/book/[authors]/[book title]-blah blah blahandlocalhost/book/[authors]，但我还需要具有子分类法的父分类法slug，如[父分类法slug]/[子分类法slug]我尝试将父分类法与；子元素使用“/”替换，但返回404页未找到，尽管使用“-”合并效果很好。

$author_slug = array_pop($author_type_term)->slug;
$parent_slug=get_term(get_term_by(\'slug\',$author_slug,\'authors\')->parent,\'authors\')->slug;
$post_link = str_replace(\'%authors%\', $parent_slug . "-" .$author_slug , $post_link);

How can I use "[parent-taxonomy-slug]/[child-taxonomy-slug]" in permalink?

add_rewrite_rule(
    \'book/([^/]+)/([^/]+)/([^/]+)-blah-blah-blah?(:/([0-9]+))?/?$\',
    \'index.php?post_type=book&name=$matches[3]\',
    \'top\'
);