当需要显示文章的父分类和当前分类链接时，我们可以使用这段代码：

$categories = get_the_category();echo '<ul>';echo '<li> Parent Category: ';foreach( $categories as $category ){     if($category->parent != 0){          $parent_category = get_term( $category->parent );          echo '<a href="' . esc_url( get_category_link($parent_category->term_id)) . '">' . esc_html($parent_category->name) . ' </a>';          break;     }}echo '</li>';echo '<li>Subcategory: ';foreach( $categories as $category ){     if($category->parent != 0){          echo '<a href="' . esc_url( get_category_link($category->term_id)) . '">' . esc_html($category->name) . ' </a>';     }}echo '</li></ul>';