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Posted by Jochem Maas on 04/11/05 20:45
AndreaD wrote:
> I have a session variable called
>
> $_SESSION['total'] the problem is I can't delete/reset it. I have tried
>
> $_SESSION['total']= 0;
>
> $_SESSION['total']= "";
I guess you didn't know/think of trying null:
$_SESSION['total'] = null;
....which has the same effect as using:
unset($_SESSION['total']); // as you have been told on at least 3 diff occasions ;-)
this oneliner might give you a little insight:
<?php $x=1;$y=2;unset($x);$y=null;var_dump($x,isset($x),empty($x),$y,isset($y),empty($y)); ?>
I encourage you to read the following pages for a better understanding of variables:
http://php.net/unset http://php.net/empty http://php.net/isset,
and this section: http://php.net/variables
have fun!
rgds,
Jochem
PS - personally I try to remember to set a var to null if the code is inside a loop,
in order to minimize function call overhead. (anyone with real skill care to comment
as to whether there is actually a difference between setting a var to null and calling unset
on it? also speedwise?)
>
>
> and the thing remains. Is there a special way to delete them??
>
>
> AD
>
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