Forgot to cc list, see below
---------- Forwarded message ----------
From: "Chris Wright" <c...@daverandom.com>
Date: 4 Dec 2014 14:09
Subject: Re: [PHP-DEV] Re: Only variables can be passed by reference
To: "Andrea Faulds" <a...@ajf.me>
Cc:
> On 4 December 2014 at 12:26, Andrea Faulds <a...@ajf.me> wrote:
>>
>>
>> > On 4 Dec 2014, at 10:38, Yasuo Ohgaki <yohg...@ohgaki.net> wrote:
>> >
>> >
>> > Yet another sample code. This cannot be executed on 3v4l.org for
security
>> > reasons.
>> >
>> > <?php
>> > $sock = fsockopen('www.php.net', '80');
>> > var_dump($sock);
>> >
>> > $socks = array($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’s
the point? You’ve discarded the read/write/error information, all the
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():
>
> $socks = array($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 = 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
>>
>
