Newsgroups: php.internals Path: news.php.net Xref: news.php.net php.internals:100631 Return-Path: Mailing-List: contact internals-help@lists.php.net; run by ezmlm Delivered-To: mailing list internals@lists.php.net Received: (qmail 24652 invoked from network); 15 Sep 2017 14:54:19 -0000 Received: from unknown (HELO lists.php.net) (127.0.0.1) by localhost with SMTP; 15 Sep 2017 14:54:19 -0000 X-Host-Fingerprint: 62.31.75.76 76.75-31-62.static.virginmediabusiness.co.uk Received: from [62.31.75.76] ([62.31.75.76:4667] helo=localhost.localdomain) by pb1.pair.com (ecelerity 2.1.1.9-wez r(12769M)) with ESMTP id 06/60-19300-799EBB95 for ; Fri, 15 Sep 2017 10:54:18 -0400 Message-ID: <06.60.19300.799EBB95@pb1.pair.com> To: internals@lists.php.net References: <3D.0C.10715.383F8B95@pb1.pair.com> <1505382004.4078127.1105791680.3A06C2FA@webmail.messagingengine.com> <16.4C.19300.B2D7AB95@pb1.pair.com> <98ab178e-b999-7e36-5ff5-7b8c28fe0dd4@gmx.de> <02.9E.19300.FD58AB95@pb1.pair.com> <20170914134603.GS8096@phcomp.co.uk> <33.29.19300.7379BB95@pb1.pair.com> <55603872-e832-65ea-25b6-48e01074a4c7@lsces.co.uk> In-Reply-To: <55603872-e832-65ea-25b6-48e01074a4c7@lsces.co.uk> Date: Fri, 15 Sep 2017 15:54:09 +0100 Lines: 2 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="utf-8"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Newsreader: Microsoft Windows Live Mail 16.4.3564.1216 X-MimeOLE: Produced By Microsoft MimeOLE V16.4.3564.1216 X-Posted-By: 62.31.75.76 Subject: Re: [PHP-DEV] Deprecate and remove case-insensitive constants? From: TonyMarston@hotmail.com ("Tony Marston") "Lester Caine" wrote in message news:55603872-e832-65ea-25b6-48e01074a4c7@lsces.co.uk... > >On 15/09/17 10:02, Tony Marston wrote: >> Why is it not possible to identify a single upper and lower case variant >> for every character in every character set? > >Can't find the right unicode standard page, but >https://www.elastic.co/guide/en/elasticsearch/guide/current/case-folding.html >sums it up. > Try this page: http://unicode.org/faq/casemap_charprop.html Notice that case folding for case insensitive comparisons is relatively easy when compared with case switching. -- Tony Marston