Wordpress：在post循环中仅显示父类别

Question

如何在帖子循环中仅显示父类别（没有子类别）？

我有：

<span class="entry-category"><?php the_category(', '); ?></span>

我该怎么办？

Answer 1

foreach (get_the_category() as $cat) {  
    $parent = get_category($cat->category_parent);
    if (!get_category($cat->category_parent)) {
        // do something with the category, like use it to create a new query_posts or something
    }
}

Answer 2

您可以获取类别并检查每个条目的parent字段，如

<?php
    $categories = get_the_category();
    if($categories){
        foreach($categories as $category) {
            if ($category->parent < 1) {
                // Your action here
            }
        }
    }
?>