Posted by steve on 07/06/05 05:35

"" wrote:
> In comp.lang.php steve <UseLinkToEmail@dbforumz.com> wrote:
> > ok, so what is the difference between:
> >
> > unset($var)
> > and
> > $var = null;
> >
> > I know the first form removes the $var from name space, but
> is there
> > any functions to check the difference. isset() responds the
> same way
> > to both.
>
> http://php.net/isset says it all:
>
> "isset() will return FALSE if testing a variable that has been
> set to
> NULL."
>
> I have no idea why (and who decided that) a variable set to
> null is
> considered unset (and a reference to a variable with value
> null not
> raising a "Undefined variable" notice). IMHO it simply should
> return
> true since it is just plain inconsistent.

I am looking for something like defined(CONSTANT) but I guess not..

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