Posted by Daniel Tryba on 07/06/05 04:18

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.

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