Hide header/footer when url contains a certain parameter

Question

I have a multi page webpage that has a header and footer on all pages, and I am creating an app than can view certain areas of the page, but I dont want to show the footer and h

Answer 1

You can use a PhP shorthand IF to set two different classes, depending on whether you pass a a parameter (?hide) or not:

">

Then define some CSS:

.hidden{
    display: none;
}