i am missing some details but here is the code for this string
"category level 1-> level 2 -> level3"...

我还将搜索词作为标题和围绕它的循环。。

<h1><?php echo \'Search Results For:\'. get_search_query(); ?></h1>
<ul>
<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
    <?php
    $category = get_the_category(); 
    $catName = $category[0]->cat_name;
    $catFatherID = $category[0]->category_parent;
    $catFather = get_the_category_by_ID($catFatherID)
    ?>
    <li class="result"><?php if($catFather){echo $catFather.\'&raquo;\';}; echo $catName.\'&raquo;\';the_title(); ?></li>

<?php endwhile; ?>
<?php endif; ?>
</ul>

希望这有帮助；）<干杯，萨吉夫。