I have always (although I know this wasn?t the case prior to PHP 4) thought
that unset() removed the variable from memory. Clearly this can?t be the
case if it has a value of NULL.
But if this is the way things work then is_null() ought to be an alias of
isset().
-Marten.
Icq# 38863127
-----Original Message-----
From: Andrei Zmievski [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, February 06, 2001 8:43 PM
To: Bjoern Hoehrmann
Cc: Martin Jansen; PHP Development Mailing List
Subject: Re: [PHP-DEV] wrong implementation of isset()?
On Tue, 06 Feb 2001, Bjoern Hoehrmann wrote:
> >NULL == not set
>
> Great analysis. What about answering the question? Stanislav Malyshev
> said some months ago this is 'strange', see the discussion around bug
> 6076. Tell us at least, why this actually isn't strange.
By default, any unset variable has value NULL - and isset(NULL) returns
false to indicate that. Similarly, assigning NULL to a variable unsets
it.
-Andrei
* The great thing about standards is that there are so many to choose from.
*
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