PHP pages cache when I don't want them to - help!

// PREVENT CACHING FIRST BEFORE ANYTHING ELSE!
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // Date in the past
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); // always
modified
header("Cache-Control: no-store, no-cache, must-revalidate"); // HTTP/1.1
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache"); // HTTP/1.0

I am using the following commands to force the PHP script to not cache;
however, it still does cache. Browser settings were checked and corrected;
yet it still caches.

Suggestions?

Phil

"Phil Powell" <soazine@erols.com> wrote in message
news:<laGWa.3597$cf.2209@lakeread04>...
>
> header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
> header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
> header("Cache-Control: no-store, no-cache, must-revalidate");
> header("Cache-Control: post-check=0, pre-check=0", false);
> header("Pragma: no-cache");
>
> I am using the following commands to force the PHP script to not cache;
> however, it still does cache. Browser settings were checked and corrected;
> yet it still caches.

Check if the script outputs anything (including whitespace) before
those header() calls. In particular, verify that the first five
characters in your script file are '<?php'. If this is not the case,
header() calls will be ignored.

Cheers,
NC