我通常很难做到这一点，但这次我做得相对容易。此答案的主要参考资料如下：

https://codex.wordpress.org/Rewrite_API/add_rewrite_rule

我想使用anything 在以下内容中为discipline.

/artists/djave_co/anything

首先，我添加了一个“重写标记”

function custom_rewrite_tag() {
  add_rewrite_tag(\'%discipline%\', \'([^&]+)\');
}
add_action(\'init\', \'custom_rewrite_tag\', 10, 0);

接下来，我做到了print_r($wp_query->query_vars) 在默认自定义帖子页面上。结果如下：

Array
(
    [page] => 0
    [artists] => djave_co
    [post_type] => artists
    [name] => djave_co
    [error] => 
    ...

这对我很有帮助，因为我知道我需要post_type=artists&artists=djave_co 在下一步中。

下一步是添加自定义重写规则：

function custom_rewrite_rule() {
  add_rewrite_rule(
    \'^artists/([^/]*)/([^/]*)/?\',
    \'index.php?post_type=artists&artists=$matches[1]&discipline=$matches[2]\',
    \'top\');
}
add_action(\'init\', \'custom_rewrite_rule\', 10, 0);

决赛和very important step was to clear the permalinks in the WordPress admin panel.