categories - Wordpress - Get Current Category Parents

Question

In category.php, how would I test against a category having a parent category?

If the parent category is A, and the sub-category is B, and the user loads the URL for category B, I would like to be able to test if it has parent A, and run code if it does.

I've found the get_category_parents tag, but it seems to return a link list rather than an array:

get_category_parents($cat, TRUE, ', '));

Even if I got the array, I'm not sure what the php function is to test against it (php noob).

Thanks!

Answer 1

You can use the cat_is_ancestor_of function to check if a category is a child of another category. For example to check if the current category is a child of a category named 'blog':

cat_is_ancestor_of(get_cat_id('blog'), get_query_var('cat'))