How do I keep track of the subcategory I am in using PHP?

I have seen it many times, but I'm not sure how it is done. I am referring to sites like online catalogues where they have a legend(or a map) to your subcategory.

it looks like: Electronics > Laptops > 15" > Under $500

Can 开发者_JAVA技巧someone tell me what it is called so I can Google it?

Can someone tell me what it is called so I can Google it?

It is called a Breadcrumb

Try "Breadcrumb Navigation"+PHP

What you've described is usually referred to as a breadcrumb trail.

its commonly referred to as 'breadcrumbs'