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	"'Nikita Popov'" <nikita.ppv@gmail.com>
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Date: Wed, 11 Jul 2012 11:57:16 +0200
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Subject: RE: [PHP-DEV] bug 18556 - tolower & locales
From: thetaphi@php.net ("Uwe Schindler")

Hi Nikita,

That was my first problem with the code, too!

I would make the Zend engine use the ROOT Locale for PHP's language =
parsing
(in Java it's called Locale.ROOT, in C it=92s the Locale named ""), so =
its
invariant to local settings but works correct for all of Unicode. In =
theory,
this "case insensitive matching" should *not* be done by lowercasing, in
Unicode the correct way to do it is by "case folding", which is =
something
different (but using the ROOT locale has almost the same effect). In =
general
methods like Java's String.equalsIgnoreCase(String) do this internally.

I don't think ASCII-only lowercasing is in-compatible to the allowed PHP
identifier characters used by class names and what else.

Uwe

-----
Uwe Schindler
thetaphi@php.net - http://www.php.net
NSAPI SAPI developer
Bremen, Germany

> -----Original Message-----
> From: Nikita Popov [mailto:nikita.ppv@gmail.com]
> Sent: Wednesday, July 11, 2012 11:41 AM
> To: Stas Malyshev
> Cc: PHP Internals; Johannes Schl=FCter
> Subject: Re: [PHP-DEV] bug 18556 - tolower & locales
>=20
> On Wed, Jul 11, 2012 at 7:40 AM, Stas Malyshev =
<smalyshev@sugarcrm.com>
> wrote:
> > Hi!
> >
> > I've prepared a fix for bug #18556 - see
> > https://github.com/php/php-src/pull/126
> > A slight complication there is that for internal operations we
> > probably want locale-independent lowercasing, while for regular =
string
> > operations we probably want to stay with locale-depenedent one. =
That's
> > how I implemented it, even though it adds a bit of complexity, but I
> > think it's the best way to solve it. Any
comments/objections/improvements?
>=20
> With this patch, will it still be possible to use foreign class names
correctly?
> Like writing them in Russian and expecting the case-insensitivity to =
work
> correct?
>=20
> Nikita
>=20
> --
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