On 20 Dec 2001, at 17:34, Alex Shi wrote:

> If a sesson_id is known, how can check if the session exists?

I think this answers the question (function.session-id.html)

> session_id
> (PHP 4 >= 4.0.0)
> session_id -- Get and/or set the current session id
> Description
> string session_id ([string id])
> session_id() returns the session id for the
>      current session. If id is specified, it
>      will replace the current session id.
> The constant SID can also be used to
>      retrieve the current name and session id as a string suitable for
>      adding to URLs.


"Reality is that which, when you stop believing in it, doesn't go
                -- Philip K. Dick

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