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

Using PHP

url is www.mypage.com?inapp=true so if you need to hide header and footer when 'inapp' is true

    
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here header and footer are not loading at all but if you wish to just hide header and footer add css to display hide when that particular query string is set.