Here is another great WordPress function to test if you are in a subcategory or the actual parent category and if so return true. This function is pretty much identical in concept to the is_page_or_sub() function I released previously. However, it just tests categories and not pages. Also, the code is significantly different since there are a few more available pre existing function we can build upon here. For example, the cat_is_ancestor_of() function comes in really handy and does a lot of the heavy lifting for this simple but very powerful function. I use this very function to build complex category based navigation and ...

Have you ever wanted to know if the page you're on is a child of a certain page because you needed to know that information in order to add a snippet of code to the sidebar or remove something or whatever you had planned but you tried and just couldn't figure out a solution that was simple and easy to maintain? Well, here is a piece of code that will do just that. I use this very code all over the place, on pretty much every project I do. The concept is simple. I need to know more than if the is_page('portfolio'); I ...