NYCPHP Meetup

[Jim Hendricks]

One warning, by enabling cacheing to eliminate the browser message you may
be allowing the user
to see invalid data.  The normal reason for disabling all caching is to
force the browser to requery the
server to ensure that the dynamically created page contains the most up to
date data.  Use of the
back button on the browser or use of history in the browser allows pulling a
page out of the browsers
cache, no query is sent to the server.  If the browser sees that a page in
it's cache is expired, you get
that warning which indicates it needs to requery the server.

Jim

----- Original Message -----
From: "Kayra Otaner" <kayraotaner at yahoo.com>
To: "NYPHP Talk" <talk at nyphp.org>
Sent: Thursday, August 01, 2002 10:46 AM
Subject: Re: [nycphp-talk] Warning: Page has expired!!


> Hi,
>
> You can solve most of the 'page has expired messages' using :
>
> header("Cache-Control: yes-store, yes-cache");
> header("Pragma: yes-cache");
>
> on top of page.
> Actually this also works for POST method but sometimes I'm getting page
expired messages although
> I used this header all the time. I've checked that it is not because of
browser, it happens
> randomly on all versions of IE and Netscape. I guess this weirdness caused
by Isp's proxy servers.
>
> Best
>
> Kayra Otaner
>
>
> --- Oktay Altunergil <nyphp at altunergil.com> wrote:
> > I'm not too sure about this but normally when you hit back on a posted
page, it should ask you
> > whether to post the form again.
> >
> > Might this have something to do with a  <HTTP-EQUIV="PRAGMA"
CONTENT="NO-CACHE"> tag you might
> > have on the page ?
> >
> > Oktay
> >
> > On Thu, 01 Aug 2002 02:59:01 -0400
> > "Donald J. Organ IV" <dorgan at optonline.net> wrote:
> >
> > > i dont think you can get around this, basically you are getting that
message
> > > because the information was posted by a form.
> > >
> > > ----- Original Message -----
> > > From: <WEBPHP4 at aol.com>
> > > To: "NYPHP Talk" <talk at nyphp.org>
> > > Sent: Thursday, August 01, 2002 2:28 AM
> > > Subject: [nycphp-talk] Warning: Page has expired!!
> > >
> > >
> > > > I wrote an app that has a master config file which contains all the
> > > session
> > > > calls. I have writen many php files that have require statements
that call
> > > > this master config file.
> > > >
> > > > When ever I hit the back button from any of these pages at any time
I get
> > > the
> > > > page that tells me the page has expired. I was wondering how I can
get
> > > around
> > > > this. I would like it to display the last page and all the data that
was
> > > in
> > > > the text boxes, and so on.
> > > >
> > > > I do hope I gave enough info
> > > >
> > > > John
> > > >
> > > >
> > >
> > >
> >
>
>
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