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Date: Fri, 4 Jul 2014 00:43:25 -0700
Message-ID: <CAKOpQSwdee_aTEMX3LGWMCdGc9GV0SC0+6vZBO5pwxik31RAPA@mail.gmail.com>
To: Stas Malyshev <smalyshev@sugarcrm.com>
Cc: Andrey Andreev <narf@devilix.net>, PHP internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=089e010d8d30d6395a04fd59472f
Subject: Re: [PHP-DEV] not_null function
From: kris.craig@gmail.com (Kris Craig)

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On Fri, Jul 4, 2014 at 12:26 AM, Stas Malyshev <smalyshev@sugarcrm.com>
wrote:

> Hi!
>
> > Not any that I'm aware of, and I personally have never used is_null().
> > I share your opinion that we don't really need is_null(), but with BC
> > in mind, I don't think it would get removed.
>
> There's nothing to remove. Every type has is_* function, including null
> type. If is_null() is offensive to somebody for some reason, that person
> is free to not use it.
>

I'm not offended by it and I get that it was initially created for the sake
of having an is_* function for each type.  I'm just trying to understand
why it's *still* there and why it's not a language construct.  It serves no
unique purpose and has a negative performance impact.

What would be wrong with changing it from a function to a language
construct like isset() and empty()?  If is_null() were the equivalent of
!isset( $var ) || $var === NULL, it would make a hell of a lot more sense
than what's there now.

--Kris

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