感谢Manzabar的回答，我可以从您的代码中对其进行修改，以得到什么我想要。

Thanks for the answer Manzabar, from your code i was able to modify it to get what i wanted.

最终，我想要一个数组，其中包含该类别的parentID。这是我的操作方式：

Ultimately, I wanted an array of the category's parentIDs. Here's how I did it:

$parents = get_category_parents($cat, false, '^%%^');
$parents = explode('^%%^', $parents);
$parentIDs = array();
foreach($parents as $parent){
    if (is_null($parent) || empty($parent)){
        continue;
    }
    $parentIDs[] = get_cat_ID($parent);
}
echo '<pre>';
print_r($parentIDs);
echo '</pre>';

请注意，$ cat拥有当前类别ID

Note that $cat holds the current categoryID