How to redirect the entire site?

Question

PHP

Hello. There is a site on 1C Bitrix with an infinite number of sections and pages, changing it manually is not an option.
It is necessary to make sure that when entering any page, absolutely any page, the page is updated and the GET parameter is added.
Example:
A person went to the test.ru/about.php page, you need to immediately transfer the person to the same page but with a get, test.ru/about.php/?thisis=parameter. Does anyone see such a solution?
Thanks

Answer 1

Edit rewrites in htaccess (Apache, right?).

Answer 2

In index.php at the very top. In theory it should help.

header('Location: '.$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'].'/?thisis=parameter');