Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:82602
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: pass (pb1.pair.com: domain ajf.me designates 192.64.116.216 as permitted sender)
Content-Type: text/plain; charset=windows-1252
Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2070.6\))
In-Reply-To: <F74DA323-CB58-4CA5-A75A-9D36F4138F07@ajf.me>
Date: Fri, 13 Feb 2015 11:31:38 +0000
Cc: Thomas Punt <tpunt@hotmail.co.uk>,
 "internals@lists.php.net" <internals@lists.php.net>
Content-Transfer-Encoding: quoted-printable
Message-ID: <1E15BAAB-C8FC-49A9-B73F-E0E7DEFA208D@ajf.me>
References: <DUB113-W52CAFBF648C8CE4A764E75F9220@phx.gbl> <54DDA797.4030501@php.net> <F74DA323-CB58-4CA5-A75A-9D36F4138F07@ajf.me>
To: Michael Wallner <mike@php.net>
Subject: Re: [PHP-DEV] [DISCUSSION] Make empty() a Variadic
From: ajf@ajf.me (Andrea Faulds)


> On 13 Feb 2015, at 11:16, Andrea Faulds <ajf@ajf.me> wrote:
>=20
> Hey,
>=20
>> On 13 Feb 2015, at 07:28, Michael Wallner <mike@php.net> wrote:
>>=20
>> On 12/02/15 19:55, Thomas Punt wrote:
>>=20
>>> I'd like to propose to make empty() a variadic, where if any
>>> arguments passed in are considered empty, then false is returned
>>=20
>> Should that read "if any arguments passed in are considered *NOT* =
empty,
>> then false is returned=94?
>=20
> No, I think it=92s correct, if confusingly phrased. I believe Thomas =
is proposing variadic empty() where TRUE is returned if any of its =
arguments are empty, otherwise FALSE. So, empty($a, $b, $c) would be =
equivalent to empty($a) || empty($b) || empty($c), much like isset($a, =
$b, $c) is equivalent to (and implemented as) isset($a) && isset($b) && =
isset($c).

Wait, I think I made a mistake.

* Thomas proposed "if any arguments passed in are considered empty, then =
false is returned=94, i.e. !(empty($a) || empty($b) || empty($c)) if his =
words are taken literally. This doesn=92t make much sense, I think it =
was a mistake.
* You suggested he may have meant "if any arguments passed in are =
considered *NOT* empty, then false is returned=94, i.e. (empty($a) && =
empty($b) && empty($c))
* I assume Thomas actually meant =93where if any arguments passed in are =
considered empty, then *true* is returned=94, i.e. (empty($a) || =
empty($b) || empty($c))

Sorry for the confusion.

I think the || behaviour is the most useful, as it=92s the analogue of =
isset=92s. So !empty($a, $b, $c) would work similarly to isset($a, $b, =
$c), and similarly, !isset($a, $b, $c) would work similarly to empty($a, =
$b, $c).

But that=92s just my opinion. :)
--
Andrea Faulds
http://ajf.me/