back button and page expiry

[ken]

I've read in other posts how to force the page to be refreshed. I simply put these lines in my page:

<meta http-equiv="Expires" content="Tue, 01 Jan 1980 00:00:00 GMT">
<meta http-equiv="Last-Modified" content="Tue, 01 Jan 1980 00:00:00 GMT">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta http-equiv="Cache-Control" content="no-cache, must-revalidate">
<meta http-equiv="Pragma" content="no-cache">

but even then, when I click on the back button on my IE browser, I'm still able to see a cached page. I'd like to find a way so that when a user logs out, clicking the back button doesn't expose secured pages. Is there any other way to do this?

[teamshadow]

Use a session variable when the user logs in.
Unset the session variable when they log out.
Then if you have your pages check for that session variable it won't exist if they click the back button after loggin out.

[BabeWalls]

I have the same problem.
I own a wallpaper site and underneath each wallpaper users can post thier comments on it.
Once they click submit it takes them to a php page which has a go back link on it like this:

<a href="#" onClick="history.go(-1)">go back</a>

The problem is that this doesn't update the page so the user sees that their comment isn't there so they click submit again, and again.. etc.

I have been recommeded to use:

<meta http-equiv="Expires" content="Tue, 01 Jan 1980 00:00:00 GMT">
<meta http-equiv="Last-Modified" content="Tue, 01 Jan 1980 00:00:00 GMT">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta http-equiv="Cache-Control" content="no-cache, must-revalidate">
<meta http-equiv="Pragma" content="no-cache">

but the page which I want to go back to is not a php page and also I want it to cache the page so that the wallpaper doesn't have to download again when they click back (which would use extra bandwidth)

Is there no way that on the php page with the go back link I can get it to refresh the next page when they click the link?

e.g something like <a href="<? $referralURL ?>">go back</a>

Please help.

[teamshadow]

_SERVER["HTTP_REFERER"] is the variable I think you are looking for.

[BabeWalls]

hmm.....

That didn't seem to work.

I added this to the php file:
$referal="_SERVER['HTTP_REFERER']";

and change the link to <a href="<? $referal ?>">click here</a>

It should have taken me to this page: http://babewalls.host.sk/sgs/sgs.php?gal=gallery/b/&img=5

But it took me to:
http://babewalls.host.sk/sgs/

[teamshadow]

sorry should have been more clear, do:

change the link to <a href="<?php echo $_SERVER['HTTP_REFERER']"; ?>">click here

assuming of course you have a newer version of PHP. Older versions would be:

change the link to <a href="<?php echo $HTTP_SERVER_VARS['HTTP_REFERER']"; ?>">click here

[BabeWalls]

Finally, someone with some brains to help me! 😃

I have posted all over the place trying to get some help with this and finally I have the answer.

Thanks a lot. You have made my day!

[TTT]

if i remember right,
window.location.replace
will flush cache