Newsgroups: php.internals Path: news.php.net Xref: news.php.net php.internals:76757 Return-Path: Mailing-List: contact internals-help@lists.php.net; run by ezmlm Delivered-To: mailing list internals@lists.php.net Received: (qmail 81001 invoked from network); 21 Aug 2014 17:47:38 -0000 Received: from unknown (HELO lists.php.net) (127.0.0.1) by localhost with SMTP; 21 Aug 2014 17:47:38 -0000 Authentication-Results: pb1.pair.com smtp.mail=ajf@ajf.me; spf=pass; sender-id=pass Authentication-Results: pb1.pair.com header.from=ajf@ajf.me; sender-id=pass Received-SPF: pass (pb1.pair.com: domain ajf.me designates 192.64.116.207 as permitted sender) X-PHP-List-Original-Sender: ajf@ajf.me X-Host-Fingerprint: 192.64.116.207 imap2-2.ox.privateemail.com Received: from [192.64.116.207] ([192.64.116.207:45804] helo=imap2-2.ox.privateemail.com) by pb1.pair.com (ecelerity 2.1.1.9-wez r(12769M)) with ESMTP id 3E/F2-64991-9B036F35 for ; Thu, 21 Aug 2014 13:47:38 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.privateemail.com (Postfix) with ESMTP id E72718C0084; Thu, 21 Aug 2014 13:47:34 -0400 (EDT) X-Virus-Scanned: Debian amavisd-new at imap2.ox.privateemail.com Received: from mail.privateemail.com ([127.0.0.1]) by localhost (imap2.ox.privateemail.com [127.0.0.1]) (amavisd-new, port 10024) with LMTP id OZNovucyP2j5; Thu, 21 Aug 2014 13:47:34 -0400 (EDT) Received: from [192.168.0.2] (05439dda.skybroadband.com [5.67.157.218]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.privateemail.com (Postfix) with ESMTPSA id C06538C0086; Thu, 21 Aug 2014 13:47:30 -0400 (EDT) Content-Type: text/plain; charset=windows-1252 Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) In-Reply-To: Date: Thu, 21 Aug 2014 18:47:27 +0100 Cc: Derick Rethans , PHP Developers Mailing List Content-Transfer-Encoding: quoted-printable Message-ID: <6A4BFB4D-D8FA-414B-BCEA-10299E371C66@ajf.me> References: To: Adam Harvey X-Mailer: Apple Mail (2.1878.6) Subject: Re: [PHP-DEV] On BC and not being evil (Was: Re: [PHP-DEV] [RFC] Integer Semantics) From: ajf@ajf.me (Andrea Faulds) On 21 Aug 2014, at 18:28, Adam Harvey wrote: > Every time we break BC =97 in either of the ways Derick said =97 we = narrow > the subset of PHP 5 and PHP 7 that's available to people writing PHP > code that has to work on both. If we narrow it too far, it'll be too > unexpressive, or too hard to use, or just plain won't do something > that they'll need, and PHP 7 will risk becoming this decade's Perl 6: > the cautionary tale for what happens when you burn all the boats. Not all BC breaks prevent code from being both forwards- and = backwards-compatible, however. In some cases, the new way to do = something works correctly in old versions as well. -- Andrea Faulds http://ajf.me/