Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:83102
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: softfail (pb1.pair.com: domain golemon.com does not designate 209.85.215.45 as permitted sender)
MIME-Version: 1.0
Sender: php@golemon.com
In-Reply-To: <CACwt+Jds5FOveP0pK6G6HXF9_tLUMousRQj2=bUtt-sYXsrGiw@mail.gmail.com>
References: <CAESVnVoZYiMWQk1Ydc-9wbkJo7Ru_4mrUtrubW=Rh=QKK9o8TA@mail.gmail.com>
	<CACwt+Jds5FOveP0pK6G6HXF9_tLUMousRQj2=bUtt-sYXsrGiw@mail.gmail.com>
Date: Wed, 18 Feb 2015 10:10:47 -0800
Message-ID: <CAESVnVrhBTdFOGUvpD3MheQCeK8kM_VGvOKvYG4RX=OFFhSgBA@mail.gmail.com>
To: Patrick ALLAERT <patrickallaert@php.net>
Cc: PHP internals <internals@lists.php.net>
Content-Type: text/plain; charset=UTF-8
Subject: Re: [PHP-DEV] Scalar Type Hints v0.4
From: pollita@php.net (Sara Golemon)

On Wed, Feb 18, 2015 at 7:34 AM, Patrick ALLAERT <patrickallaert@php.net> wrote:
> Regarding 2) and 3):
> An option might be to implement "weak mode" only and configure the coercion
> rules "reporting" in a similar way than with the error_reporting
> configuration entry.
>
>     ini_set("coercion_reporting", 0); // current PHP 5.x behaviour
>

The significant problem with this is that it effects not only the
current script, but also all callees (until the next time someone
flips the bit).

So imagine LibraryA.php was written for PHP5, no scalar type hints,
and all that comes with it.

Your application turns on COERSION_WARNING and calling LibraryA::doStuff(1,2,3);

That call is valid because you're a good programmer who reads the
manual and knows how to pass the right args.  The author of LibraryA,
however, wrote it while drunk at a ruby meetup and is depending on
weak conversions all over the place.  They even need md5(array()) to
output 4410ec34d9e6c1a68100ca0ce033fb17 (yes, I know we don't allow
that anymore, enjoy the metaphor)

My point is that it potentially imposes new warnings on foreign code.

-Sara