Page expired: irritating thing about PHP

[sfullman]

Hi There,

I figure any normal person occasionally presses the "BACK" button in their browser. I used to code with ASP and will never do that again because it's pretty lame, but one thing that I get with PHP is this message when I try to go 'back' in history:

Warning: Page has Expired The page you requested was created using information you submitted in a form. This page is no longer available. As a security precaution, Internet Explorer does not automatically resubmit your information for you.

To resubmit your information and view this Web page, click the Refresh button.

When the PHP/server is sending this page out, it must be setting an expires time on it and telling the browser NOT to cache the page. For sites using cold fusion and some other scripting engines, this doesn't happen; when you go back, the browser just shows a "snapshot" (without re-posting the form), and would only refresh the form if you specifically hit "refresh."

Basically, is there any way to stop sending no-cache information to the browser for a form page?

Thank you very much for your assistance.

Sam Fullman
Compass Point Media

[Anon]

Yes! I solved this very problem.

http://www.zend.com/manual/function.session-cache-limiter.php

Basically, what I did was set the cache limiter to not expire, and public. But, I know there may be some, "security" issues.... but at least you can hit your browsers back button till the cows come home and you'll be happy.

[Anon]

Notice that it only happens in IE, Netsfcape 6 doesn't have this problem.

Add a header message to your script, something like:

header(cache-control: public)

[I think that's right]

or mess withn pragma- cache and it will be fixed.

There are messages on this board and you can do a google search to find out more.

HTH