How to get the category title in a post in Wordpress?

问题

Say I have a post called Hello World in Wordpress and I'm directly viewing this page, how would I go about finding the category of "Hello World" and displaying it?

回答1:

Use get_the_category() like this:

<?php
foreach((get_the_category()) as $category) { 
    echo $category->cat_name . ' '; 
} 
?>

It returns a list because a post can have more than one category.

The documentation also explains how to do this from outside the loop.

回答2:

You can use

<?php the_category(', '); ?>

which would output them in a comma separated list.

You can also do the same for tags as well:

<?php the_tags('<em>:</em>', ', ', ''); ?>

来源：https://stackoverflow.com/questions/945906/how-to-get-the-category-title-in-a-post-in-wordpress