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Posted by Tony Marston on 01/26/07 10:18
The session ID is simply the key to a record which exists on the server, and
this record contains whatever session data you write to it. This means that
different PHP pages which provide the same session ID will connect to the
same session data on the server. This is the way that one web page passes is
state to another web page.
BTW, $_POST and $_SESSION are totally different, and it is not a case of
using one or the other. You will always use $_POST when sending data from
the client to the server, while the use of $_SESSION is totally optional and
invisible to the client.
--
Tony Marston
http://www.tonymarston.net
http://www.radicore.org
"Sandman" <enjoylife_95135@hotmail.com> wrote in message
news:1169805764.707449.268930@h3g2000cwc.googlegroups.com...
> Is there any particular reason I should still use $_POST?
>
> Also, I'm reading mixed things about sessions. php.net says you can
> propagate session IDs either via cookies or session IDs:
> http://www.php.net/manual/en/ref.session.php#session.idpassing
>
> OK cool.
>
> However, PHP in a nutshell makes no mention of this. Paul just says
> hey, use session_start() and you're on your way:
>
> http://hudzilla.org/phpwiki/index.php?title=Cookies_and_sessions
>
> I tested it out, and it works either way.
>
> Can someone please explain what the session ID does?
>
> Thanks!
>
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