note 7781 deleted from function.header by jimw

I'm building a web-app in PHP and have had a nightmare with MSIE 4/4.5/5 cacheing pages which shouldn't be cached. I tried sending the correct headers, which works fine with Netscape but not MSIE. After several hours trawling through the MS developer support site I found a reference to a refresh bug in recent versions of MSIE, and this solution which appears to work fine. It involves a little JavaScript in addition to the correct headers: &lt;? header ("Pragma: no-cache"); header ("Cache-Control: no-cache, must-revalidate, max_age=0"); header ("Expires: 0"); ?> <HTML> <HEAD> <TITLE>Refreshes Every Time</TITLE> <SCRIPT LANGUAGE="JavaScript"> function placebo() {} </SCRIPT> </HEAD> <BODY onUnload="placebo()"> The page content </BODY> </HTML> This isn't a PHP-specific issue so should also work fine with other approaches. Hope this is useful, Jon.