Re: distinguish between null variable and unset variable
| From: | Daniel Brown | Date: | Thu, 22 Jan 2009 20:12:10 +0000 |
| Subject: | Re: distinguish between null variable and unset variable | ||
| References: | 1 2 3 4 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-287029@lists.php.net to get a copy of this message | ||
On Thu, Jan 22, 2009 at 15:11, Shawn McKenzie <nospam@mckenzies.net> 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.
--
</Daniel P. Brown>
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