Posted by Andy Pieters on 04/11/05 19:48

Hi all

I noticed some sites are able to remove POST data 100% of the time. Even if
the user presses the back button there is no more POST data pressent.

I would like to achieve the same thing and currently I use a location header
to transfer the user to the same page.

Like

check post
do action
header('Location: $thispage');
die();

But then when the user presses the back button they can still retransmit the
action.

I tried playing with the MUST-REVALIDATE, pragma-nocache header and stuff but
it doesn't seem to work. Also I notice that on some sites, when I press the
back button, there is a white page that sais "Your session has expired".

It should be noticed that I do not use sessions.

It should be like POST-once, after that there should be no more remnants of
it.


With kind regards

Andy


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Check out these few php utilities that I released
under the GPL2 and that are meant for use with a
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http://www.vlaamse-kern.com/sas/
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