clear cache tag in PHP?

[daniel_a]

I'm frequently updating images on my site. and some users have reported they are seeing old images where new ones should be...

I assume this is a caching issue.

does anyone know of some code I can put into my PHP to clear the cache from certain pages???

thanks.

[theeper]

You can use pragma headers to force a reload. If the page is cached by the visitors ISP, or in the browser itself, you may not be able to beat it.

[jerdo]

Before you output any HTML data put this in your script

Header("Cache-control: private, no-cache");
Header("Expires: Mon, 26 Jun 1997 05:00:00 GMT");
Header("Pragma: no-cache");

I've used these on quite a few pages to keep AOL's proxies from caching pages to make AOL look faster and it seems to work.

[hand]

Additional to that you can add

header ("Last-Modified: " . gmdate ("D, d M Y H:i:s") . " GMT");

and following html-Tag

<META http-equiv="expires" content="0">