Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:79435
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: pass (pb1.pair.com: domain gmail.com designates 209.85.212.180 as permitted sender)
MIME-Version: 1.0
Sender: are.you.winning@gmail.com
In-Reply-To: <CAGAGxba0OA1qGgS4CMNUBvnTeF1GP-0CzFgd9Gu9enMw+Etk7Q@mail.gmail.com>
References: <CAGa2bXaAqbV4OnJSnXNboaZXD7cROR+Ue8jCE33uKci7kNo-KA@mail.gmail.com>
	<CAGa2bXZjpTc80vRtZH_JQL2X_dxRr9zAjE2YaJsR_xrn4XFK0w@mail.gmail.com>
	<CAGa2bXbd132j0EvLguuf=Q4u0WzujM4uPs+27-ZbxNeFKf4bYw@mail.gmail.com>
	<F513228D-3389-4A08-A0C4-7182AE4F39CF@ajf.me>
	<CAGAGxba0OA1qGgS4CMNUBvnTeF1GP-0CzFgd9Gu9enMw+Etk7Q@mail.gmail.com>
Date: Thu, 4 Dec 2014 23:46:38 +0000
Message-ID: <CAGAGxbYdx-xKnmODUB=K7DR6XyHRE3qrVjhfpc4j2CXx8W2e8w@mail.gmail.com>
To: PHP Internals List <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=001a11c36d78404a8e05096c92c1
Subject: Fwd: Re: [PHP-DEV] Re: Only variables can be passed by reference
From: cw@daverandom.com (Chris Wright)

--001a11c36d78404a8e05096c92c1
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

Forgot to cc list, see below

---------- Forwarded message ----------
From: "Chris Wright" <cw@daverandom.com>
Date: 4 Dec 2014 14:09
Subject: Re: [PHP-DEV] Re: Only variables can be passed by reference
To: "Andrea Faulds" <ajf@ajf.me>
Cc:

> On 4 December 2014 at 12:26, Andrea Faulds <ajf@ajf.me> wrote:
>>
>>
>> > On 4 Dec 2014, at 10:38, Yasuo Ohgaki <yohgaki@ohgaki.net> wrote:
>> >
>> >
>> > Yet another sample code. This cannot be executed on 3v4l.org for
security
>> > reasons.
>> >
>> > <?php
>> > $sock =3D fsockopen('www.php.net', '80');
>> > var_dump($sock);
>> >
>> > $socks =3D array($sock);
>> > var_dump(stream_select($socks, $socks, $socks, 1));
>> >
>> > //var_dump(stream_select(array($sock), array($sock), array($sock), 1))=
;
>> > //Fatal error: Only variables can be passed by reference in
>> > /home/yohgaki/tmp/ttt.php on line 8
>> > ?>
>>
>> Using stream_select without real variables like that is weird, what=E2=
=80=99s
the point? You=E2=80=99ve discarded the read/write/error information, all t=
he
return value tells you is that *something* changed.
>>
>
> While I'm undecided on this change (leaning towards "no"), there is a
more useful example with stream_select():
>
> $socks =3D array($sock);
> var_dump(stream_select($socks, $socks, NULL, 1));
>
> It is rare that anything actually uses OOB data in the real world, more
often than not stream_select() is preceded by a line like $e =3D NULL;
>
> I could maybe get behind this for specifically permitting literal NULL to
be passed, as is often the convention for out params in C, where passing a
NULL pointer is permitted and handled as "I don't want this data".
>
> Another example of where this could be useful is stream_socket_client(),
where you want to specify timeout/flags/context but don't care about
errno/errstr, so you could pass literal NULL to these instead of having to
declare a couple of trash variables.
>
> That said, the use cases above would probably be better served by named
parameters.
>
> Thanks, Chris
>
>>
>> --
>> Andrea Faulds
>> http://ajf.me/
>>
>>
>>
>>
>>
>> --
>> PHP Internals - PHP Runtime Development Mailing List
>> To unsubscribe, visit: http://www.php.net/unsub.php
>>
>

--001a11c36d78404a8e05096c92c1--