Re: distinguish between null variable and unset variable

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On Thu, Jan 22, 2009 at 15:11, Shawn McKenzie <nospam@xxxxxxxxxxxxx> wrote:
>
> Or something like this (dunno, just brainstorming):
>
> function setornull(&$var)
> {
>        if (!isset($var)) {
>                return false;
>        }
>        elseif (is_null($var)) {
>                return null;
>        }
>        return true;
> }

    Unfortunately, neither solution would work.  isset() will return
FALSE even for an instantiated and explicitly-defined NULL variable.

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