> > Just be sure you call session_start() on any page you want to access
> > session variables.
> >
>
> I have to call this function on each page I use session variable or juste
> once ?

The statement is pretty clear. You've to call it once on each page you want
to access session variables.

>
> > This assumes the latest version of PHP. The procedure is similar on
> > older versions, you just have to use session_register().
>
> From wich version session_start() is include ?

Don't know what you want, but session_start() is part of PHP since version
4.0

Jens




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