How do I save the original $_SERVER['HTTP_REFERER']; on a page that refreshes several times?

Question

I have a page where I need to get the referring URL so I can redirect them back after they compete a form. My problem is, the form has several drop menus and each time a selecti

Answer 1

If you insist on doing it with forms and hidden inputs, that's easy.

You could also do it with sessions, though, supposing you use session_start().

session_start();// At the very top of your page. Literally THE TOP.

// Set our session variable only if it is not currently set. 
if (!isset($_SESSION['referrer'])) {
    $_SESSION['referrer'] = $_SERVER['HTTP_REFERER'];
}

For more on sessions, see this. Sessions were meant for just this sort of thing, taking variables across pages and preserving state.