Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:78817
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: pass (pb1.pair.com: domain devilix.net designates 209.85.218.41 as permitted sender)
MIME-Version: 1.0
In-Reply-To: <CAOv1iQZtHKUWnezGKLcyTZJ8P7h+0KjMrL82+LSyOcw2itoDXA@mail.gmail.com>
References: <CAOv1iQY071v1PeyS0yXU-F1Kd4zcQg=AXN0sGP-gZ5cHNtL+HQ@mail.gmail.com>
	<CAHpw9AfRjN20WZe=QqK3aSLhHbcAxB7hF5Mv+en7MFLsJtfLgA@mail.gmail.com>
	<CAOv1iQYJbh9RN2k6nYEhZZ+FXWGkg-9GVWGKzZaEkr71PBYajA@mail.gmail.com>
	<CAPhkiZwiyShyoHt=6Bti0vLO-rJuZck_PV4DcYbnET+tGhMtbg@mail.gmail.com>
	<CAOv1iQbK7G4iaGdQ_42e+9mZ-zTwVXB6_PHx34S=56DW+0_Mmw@mail.gmail.com>
	<CAPhkiZwxSSSPZYNq0uS7y5-2ifSZadqyh7yt96ba60Y91fLKwQ@mail.gmail.com>
	<CAOv1iQZtHKUWnezGKLcyTZJ8P7h+0KjMrL82+LSyOcw2itoDXA@mail.gmail.com>
Date: Thu, 6 Nov 2014 15:45:03 +0200
Message-ID: <CAPhkiZyX8NgW21Jt=UW7YzX50SBZ7JLudsEOpvwgu5NHV0ugdA@mail.gmail.com>
To: =?UTF-8?Q?K=C3=A9vin_Dunglas?= <dunglas@gmail.com>
Cc: Daniel Ribeiro <drgomesp@gmail.com>, PHP Internals <internals@lists.php.net>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Subject: Re: [PHP-DEV] Better RFC conformance for FILTER_VALIDATE_URL
From: narf@devilix.net (Andrey Andreev)

Hi,

On Thu, Nov 6, 2014 at 3:39 PM, K=C3=A9vin Dunglas <dunglas@gmail.com> wrot=
e:
> FILTER_VALIDATE_DOMAIN checks conformance with DNS RFCs : total length,
> label length and allowed characters (_ are allowed in domain names but ma=
ny
> other characters are forbidden such as ~/+...). I'll add IDN support too
> when IDN support for streams will be merged.

I am not trying to argue, but where does it say that ~/+ are
disallowed, yet an underscore is? The only rule *allowing* underscores
that I've seen is the one that says any binary string is a valid DNS
record value.

Cheers,
Andrey.