destroying a session

[Marcus]

I know from php.net that when register_global s is turned on,

session_start() ;
session_unset() ;
session_destroy ();

will succeed in unsetting all session variables and then destroying the
session. I also read on the site that when using $_SESSION, you
shouldn't use session_unset, but instead should use unset() to
accomplish the 2nd of the above tasks. This example is then given:

session_start() ;
$_SESSION = array();
session_destroy ();

I'm just confused because I don't see exactly where unset() is being
used... does the $_SESSION = array(); line do the same thing as unset(),
and if so, is this all that is needed to completely close a session?

Thanks so much for everyone's help, and also for everyone's patience
while answering questions.

Marcus

[Martin C. Petersen]

Re: destroying a session

"Marcus" <JumpMan222@aol .com> skrev i en meddelelse
news:3F0B959D.1 030507@aol.com. ..[color=blue]
> session_start() ;
> $_SESSION = array();
> session_destroy ();
>
> I'm just confused because I don't see exactly where unset() is being
> used... does the $_SESSION = array(); line do the same thing as unset(),
> and if so, is this all that is needed to completely close a session?[/color]
Yeah, array() is just an empty array, so $_SESSION will be an empty array,
which is the same as unsetting all elements in it..


Martin

[Marcus]

Re: destroying a session

Martin C. Petersen wrote:
[color=blue]
> Yeah, array() is just an empty array, so $_SESSION will be an empty array,
> which is the same as unsetting all elements in it..
>
>
> Martin
>
>[/color]

Am I missing something then, because I checked in my PHP folder's
sessiondata folder, and when I "destroy" sessions with this method, the
file still remains on disk. When I try it with the first way (with
register globals on), it immediately removes the associated session
file. Any ideas why?

Marcus

[Cl1mh4224rd]

Re: destroying a session

Marcus wrote:[color=blue]
> This example is then given:
>
> session_start() ;
> $_SESSION = array();
> session_destroy ();
>
> I'm just confused because I don't see exactly where unset() is being
> used... does the $_SESSION = array(); line do the same thing as unset(),
> and if so, is this all that is needed to completely close a session?[/color]

You use unset() only when you want to get rid of individual session
variables. Example:

unset($_SESSION['username']);

The example they gave sets the $_SESSION array to an empty array,
essentially unset()ing all of the session variables at once.

~ Ryan