Also consider:
header("Cache-Control: public");
header("Cache-Control: max-age=" . $this->allowcache_expire * 60);
This will allow to set the expiration of the cached file on the on the clients
browser. The Cache Expire time is in minutes and can be found (and changed)
in the php.ini file. Search keyword Cache in php.ini and it will be the first
thing you find.
Alex Vargas wrote:
> Just add this header
>
> header ("Cache-Control: public");
>
> Alex.
>
> ----- Original Message -----
> From: "Lee P Reilly" <[EMAIL PROTECTED]>
> To: "PHP List" <[EMAIL PROTECTED]>
> Sent: Monday, January 28, 2002 11:26 PM
> Subject: [PHP] browser back button - "Page has Expired.. " problem
>
> > Hi,
> >
> > I wonder if anyone can offer me a few pointers..?
> >
> > I'm building a portal to do various bits and bobs. I'm using sessions to
> > facilitate the user authentication/login, etc. The only problem I have
> > is that when viewing these (.php) pages in IE once the session variable
> > has been set, a "Warning: Page has Expired " page is displayed whenever
> > the 'Back' button is pressed. This means that the user can only access
> > the page again by hitting 'Refresh' (and therefore posting the form data
> > back & executing whatever scripts again).
> >
> > The rest of IE's error message reads, "The page you requested was
> > created using information you submitted in a form. This page is no
> > longer available. As a security precaution, Internet Explorer does not
> > automatically resubmit your information for you."
> >
> > I know from using other web applications (Hotmail is one example), that
> > this doesn't always have to be the case. Is there anyway I can eliminate
> > this security precaution on the *server side* i.e. without telling users
> > to ditch IE ;-)
> >
> > Thanks very much in advance for any advice.
> >
> > - Best regards,
> >
> > Lee
> >
> >
> > --
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> >
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