I am having an issue with certain pages preventing the user from going back
to the previous page.
The message given by Firefox is: The page you are trying to view contains
PSTDATA that has expired from cache.
This happens in the case of an HTML form using the POST method but also a
query object in the URL.
In this case: index.php?id=shopping_cart in my URL, along with a bunch of
form data you carry from page to page in a shopping cart (quantities, what
to remove, addresses, payment info, etc...)
Is this due to the fact that I am mixing POST and query objects or is it
something else?
I already tried adding the following but it does not help:
header(Cache-Control: no-store, no-cache, must-revalidate);
header(Cache-Control: post-check=0, pre-check=0, false);
header(Pragma: no-cache);
Thanks for your help!
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