Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:11052
Return-Path: <helly@php.net>
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Delivered-To: mailing list internals@lists.php.net
Received: (qmail 39463 invoked by uid 1010); 10 Jul 2004 00:00:50 -0000
Delivered-To: ezmlm-scan-internals@lists.php.net
Delivered-To: ezmlm-internals@lists.php.net
Received: (qmail 39358 invoked from network); 10 Jul 2004 00:00:49 -0000
Received: from unknown (HELO mx.thebrainroom.net) (69.55.226.195)
  by pb1.pair.com with SMTP; 10 Jul 2004 00:00:49 -0000
Received: by mx.thebrainroom.net (Postfix, from userid 517)
	id 68FEC1488035; Fri,  9 Jul 2004 17:00:49 -0700 (PDT)
Received: from BAUMBART (p508EAFD4.dip.t-dialin.net [80.142.175.212])
	(using TLSv1 with cipher RC4-SHA (128/128 bits))
	(No client certificate requested)
	by mx.thebrainroom.net (Postfix) with ESMTP
	id 5029E1488033; Fri,  9 Jul 2004 17:00:47 -0700 (PDT)
Date: Sat, 10 Jul 2004 02:00:55 +0200
Reply-To: Marcus Boerger <helly@php.net>
X-Priority: 3 (Normal)
Message-ID: <1242942781.20040710020055@marcus-boerger.de>
To: John Lim <jlim@natsoft.com.my>
Cc: internals@lists.php.net
In-Reply-To: <20040709164211.36463.qmail@pb1.pair.com>
References: <5.1.0.14.0.20040707203931.02fa6200@mail.ionzoft.com>
 <40ED64A0.7050305@cschneid.com> <20040708151952.92187.qmail@pb1.pair.com>
 <Pine.LNX.4.58.0407080929200.2055@thinkpad.lerdorf.com>
 <20040708215205.23281.qmail@pb1.pair.com>
 <Pine.LNX.4.58.0407081454280.2055@thinkpad.lerdorf.com>
 <20040708222005.4329.qmail@pb1.pair.com>
 <Pine.LNX.4.58.0407081523470.2055@thinkpad.lerdorf.com>
 <20040708233326.73283.qmail@pb1.pair.com>
 <Pine.LNX.4.58.0407081937310.21867@miranda.org>
 <20040708235341.42767.qmail@pb1.pair.com>
 <007201c4655d$283125d0$6601a8c0@calhoun>
 <20040709164211.36463.qmail@pb1.pair.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on jc.thebrainroom.net
X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_MESSAGE,PRIORITY_NO_NAME 
	autolearn=no version=2.63
X-Spam-Level: 
X-TBR-Filter: Virus scanned and defanged
Subject: Re: [PHP-DEV] what happened to that new isset() like language
From: helly@php.net (Marcus Boerger)

Hello John,

 we are not testing against NULL here. We check for existance.
That would be having a uniform sql way to test the existance of
a table or column in a table. Hence IFNULL(), NOT IFNULL(),
NVL() are different. I also explained several times why coalesce
doesn't apply.

Friday, July 9, 2004, 6:42:10 PM, you wrote:

> Hi,

> I would suggest another name for ifsetor.

> In relational databases, there is a similar function, called NVL in oracle,
> and IFNULL in MySQL and coalesce in postgresql for testing for null, and
> returning a default value if the variable is null.

> I think ifsetor sounds a big ugly. I would suggest ifset($var,
> $defaultvalue), as there are historical analogies with mysql's
> IFNULL function, and i think ifset looks different enough from
> isset, thanks to the tall 'F'.

read top...IFNULL === is_null which has nothing to do with isset()

> $var = isset($aval) ? $aval : 0;

> $var = ifset($aval, 0);

That suggests it returns 0 if $val is set and not what you describe above.


To explain why i chose "ifsetor" try to read it as:
"if" <var> "set" return it "or" return <expr>

regards
marcus