Jeff Sittler wrote:

> In ASP, I ahve used:
> <%
>  Response.CacheControl = "no-cache"
>  Response.AddHeader "Pragma", "no-cache"
>  Response.Expires = -1
>  if Session("svUsername") = "" then response.redirect
> "../login/accessDenied.asp"
> %>

If you still have that site in ASP around, look at the header output from 

Use a Un*x box to do this:

GET /default.htm HTTP/1.0

Hit return twice after that GET line, and you'll see the headers and HTML 
and whatnot that a browser sees.

What you will find is that ASP turns your Response.Expires into stuff like 

>   header ("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
>   header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");

only with the time setting for 5 minutes from now.  So, like, change that 
July 26th date to be the current time plus 5 minutes.

PHP has built-in function to give you the GMT string from any given time, 
so it's just somedatefunction(time() + 60 * 5) only I forgot the name of 
the PHP function so you'll have to look it up.

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