我在为自定义帖子类型设置永久链接时遇到问题。下面是我的init函数的代码：

register_post_type(\'topic\',
  array(
   ...
   \'hierarchical\' => true,
   \'query_var\' => true,
   \'rewrite\' => false,
   ...
  ));

if(get_option(\'permalink_structure\')!= \'\'):
  global $wp_rewrite;

  $wp_rewrite->add_rewrite_tag(\'%topic%\', \'(.+?)\', \'topic=\');
  $wp_rewrite->add_permastruct(\'topic\', \'%forum%/%topic%/\', false, EP_PERMALINK);
endif;

基本上，我正试图以自己的方式设置permalinks，因为我想在帖子标题之前附加一个自定义的分类术语。

而不是：topic/whatever

使用：general-forum/sub-forum/whatever

这是更改链接的功能，它似乎工作正常：

add_filter(\'post_type_link\', \'topic_link\', 10, 4);
function topic_link($link, $post){
  if($post->post_type != \'topic\') return $link;
  global $wp_post_types;
  $terms = get_the_terms($post->ID, \'forum\');
  if(!is_wp_error($terms) && !empty($terms)):
    usort($terms, \'_usort_terms_by_id\');
    $forums = $terms[0]->slug;
    if(!empty($terms[0]->parent)):
      $parent_item = $terms[0]->parent;
      while(!empty($parent_item)):
        $parent = get_term($parent_item, \'forum\');
        if(!is_wp_error($parent) && !empty($parent))
        $forums = $parent->slug.\'/\'.$forums;
        $parent_item = empty($parent->parent) ? false : $parent->parent;
      endwhile;
    endif;
  endif;
  return str_replace(\'%forum%\', $forums, $link);
}

所以修改后的URL显示得很好，唯一的问题是我得到了一个404错误：）我在初始化代码中做错了什么？

LE: “论坛”分类法：

register_taxonomy(
  \'forum\',
    array(\'topic\', \'reply\'),
    array(
      \'public\' => true,
      \'name\' => _a(\'Forums\'),
      \'singular_name\' => _a(\'Forum\'),
      \'show_ui\' => true,
      //\'show_tagcloud\' => true,
      \'show_in_nav_menus\' => true,
      \'hierarchical\' => true,

      \'labels\' => array(
        \'name\' => _a(\'Forums\'),
        \'singular_name\' => _a(\'Forum\'),
        \'search_items\' => _a(\'Search Forums\'),
        \'popular_items\' => _a(\'Popular Forums\'),
        \'all_items\' => _a(\'All Forums\'),
        \'parent_item\' => _a(\'Parent Forum\'),
        \'parent_item_colon\' => _a(\'Parent Forum:\'),
        \'edit_item\' => _a(\'Edit Forum\'),
        \'update_item\' => _a(\'Update Forum\'),
        \'add_new_item\' => _a(\'Add New Forum\'),
        \'new_item_name\' => _a(\'New Forum Name\'),
      ),
      \'query_var\' => true,
      \'rewrite\' => array(\'slug\' => \'forums\', \'with_front\' => false, \'hierarchical\' => true),
      //\'update_count_callback\' => \'my_custom_count_callback\',
  )
);