hi,
I don't want my php page to be cached by the client browser.
Iam sending the following http headers to the client.
header("Expires: Sat, 1 Jan 2003 00:00:00 GMT");
header("Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0");
header("Pragma: no-cache");
but iam getting the same cached page when i use the back button. Can someone help me
as to what i have to do.
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sree_iiit: mozilla doesn't care about cache settings for back button either.. but i like it, caching is rather something like "if i get again on this page (browsing..) shall i download it again or use my local copy?"
if you want to skip a page from the back history (for example like a form target) use a header("Location: "); after performing successfully operations.
I don't think you're going to have a lot of luck getting the browser's back button to not return a cache of the page in question. If you want the user to be able to return to a new version of some previously loaded page, you will have to create a new hyperlink within the body of the php page for them to use instead.
When you are making your link consider the following: the only truly bulletproof way I've found for dealing with a caching issue is to add a dummy variable to your querystring with some novel value in it, for instance, the current time.
So instead of doing this:
echo "<a href = \"alreadyseen.php\">go back!</a>";
do:
echo "<a href = \"alreadyseen.php?nocache=
It's ugly but it works. A browser will never cache a page if it goes under a different URI, which is what adding the dummy value does.
hello Dill,
creating a hyperlink wouldn't ensure that the user wouldn't use the browsers back button.
your idea would greatly help if only we are in control of the user ;)
Also i don't want to annoy the user by disabling the browsers back button.
i could successfully solve this issue for almost all the browsers except konqueror
anyone to help me out?
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by: VGRPosted on 2003-07-09 at 04:39:44ID: 8884369
depends on browser. Some have the bad habit of completely ignoring some HTTP headers like refresh rates, cache settings etc... IE6 not to mention it.