Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:82607
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: pass (pb1.pair.com: domain hotmail.co.uk designates 157.55.1.169 as permitted sender)
Message-ID: <DUB113-W40DF2AF039DCD472EA355BF9230@phx.gbl>
Content-Type: multipart/alternative;
	boundary="_d6da0ed7-ecab-4f19-827c-89b57b833bc2_"
To: reeze <reeze@php.net>
CC: "internals@lists.php.net" <internals@lists.php.net>
Date: Fri, 13 Feb 2015 12:11:54 +0000
Importance: Normal
In-Reply-To:
 <CAG1chooZ0myaGPHn7KBa1Mh77JabzBULWSaVkbEHd13j7g146g@mail.gmail.com>
References: <DUB113-W52CAFBF648C8CE4A764E75F9220@phx.gbl>
 <54DDA797.4030501@php.net>,<F74DA323-CB58-4CA5-A75A-9D36F4138F07@ajf.me>
 <1E15BAAB-C8FC-49A9-B73F-E0E7DEFA208D@ajf.me>,<CAG1chooZ0myaGPHn7KBa1Mh77JabzBULWSaVkbEHd13j7g146g@mail.gmail.com>
MIME-Version: 1.0
Subject: RE: [PHP-DEV] [DISCUSSION] Make empty() a Variadic
From: tpunt@hotmail.co.uk (Thomas Punt)

--_d6da0ed7-ecab-4f19-827c-89b57b833bc2_
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

Hi Reeze=2C

> From: reeze@php.net
>=20
> For example: echo $a=2C $b=2C $c=2C & empty($a=2C $b=2C $c)=2C they are t=
reated equal=2C
>=20
> if the empty() means if any one of them is empty then result is TRUE=2C t=
he
> advantage of it disappeared:
>=20
> if (empty($a=2C $b=2C $c)) {
> // you might want to check it again.
> if (empty($a)) {
> //blah blah.
> } else if (empty($b)) {
>=20
> }
> }
>=20


Having empty() return TRUE if *all* arguments are empty=2C and FALSE otherw=
ise doesn't seem to be as useful (at least from what I've seen in code).


It's less common to see:

if (empty($a) && empty($b) && empty($c)) {}

than:

if (empty($a) || empty($b) || empty($c)) {}

Plus then the semantics wouldn't be inline with isset()=2C which could be s=
omewhat confusing to users.

>=20
> --=20
> Reeze Xia
> http://reeze.cn

Thanks=2C
Tom 		 	   		  =

--_d6da0ed7-ecab-4f19-827c-89b57b833bc2_--