Hi Justin,
For the first problem, I found this option in PHP.INI do the trick:
; Set to {nocache,private,public,} to determine HTTP caching aspects
; or leave this empty to avoid sending anti-caching headers.
;session.cache_limiter = nocache
session.cache_limiter =
The default was set to nocache and after I change it to empty string, it
solved my problem.
For the second problem, I tried your script with two instances of IE 6.1
running, I didn't get two distinct values. Any idea?
- Joe
----- Original Message -----
From: "Justin French" <[EMAIL PROTECTED]>
To: "Joe Wong" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Wednesday, March 12, 2003 8:43 PM
Subject: Re: [PHP] two questions about usning session.
> on 07/03/03 5:45 PM, Joe Wong ([EMAIL PROTECTED]) wrote:
>
> > Hello,
> >
> > I have two questions about using sessions in PHP.
> >
> > Firstly, I use session to remeber the username and a session ID for the
> > given user. When I hit the BACK button on the browser (IE), it always
set
> > that my page is expired and ask me to click the refresh button. How to
> > prevent this from happening?
>
> That sounds like a problem with POSTed data from forms, not necessarily a
> problem with sessions, or a problem a browser.
>
> Have you got a URL we can play with?
>
>
> > Secondly, how is the PHP session ID be computed? When user A login, a
> > session is started and his name nad session ID are stored. Now, on the
same
> > PC, I start another instance of the IE browser, login as User B, her
name
> > and session ID are stored under the same PHP session file. I switch back
to
> > the Windows of User A and continue to do something, the PHP session
gives me
> > the name of User B and User'B session ID. Why? Am I doing something
wrong
> > here?
>
> Definitely.
>
> - enable cookies on your browser
> - make sure you're using PHP >= 4.1
>
> 1. Start with a blank text file.
>
> 2. Copy and paste this in:
> ---
> <?php
> session_start();
> if (!isset($_SESSION['count'])) {
> $_SESSION['count'];
> }
> else {
> $_SESSION['count']++;
> }
> ?>
> Hello visitor, you have seen this page <?php echo $_SESSION['count'] ?>
> times.<p>
> To continue, <A HREF="<?php echo $_SERVER['PHP_SELF']; ?>">click here</A>
> ---
>
> 3. Open it up in your browser, and test that it works (the value of
> $_SESSION['count'] should increase with each click)
>
> 4. If that much works, open up the URL in a second window, and try to run
> two separate sessions... (the first window might be on 10 clicks, and the
> new one will be starting from 1)
>
> 5. If we're still cool, now try it without cookies maybe, by adding the
SID
> to the URL that they click on.
>
>
> If all this works, then the problem is obviously in your code somewhere,
not
> an issue with PHP/sessions/browsers/cookies/etc.
>
>
> Justin
>
>
>
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