Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:82158
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: pass (pb1.pair.com: domain gmail.com designates 74.125.82.175 as permitted sender)
Message-ID: <54D7ABEA.9@gmail.com>
Date: Sun, 08 Feb 2015 18:33:14 +0000
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0
MIME-Version: 1.0
To: internals@lists.php.net
References: <54D606D2.7030102@lsces.co.uk> <CAGa2bXbA8fMRi9jNj62b1Tx+-eAJtUkr2T3V_RD9Us+sLWVW3w@mail.gmail.com> <54D73248.9030509@lsces.co.uk> <14.24.24707.48937D45@pb1.pair.com> <54D74C68.6070402@beccati.com>
In-Reply-To: <54D74C68.6070402@beccati.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
Subject: Re: [PHP-DEV] Dragging the legacy users forward.
From: rowan.collins@gmail.com (Rowan Collins)

On 08/02/2015 11:45, Matteo Beccati wrote:
> On 08/02/2015 11:24, Tony Marston wrote:
>> Well said. If it is not possible to have a single codebase that runs in
>> both PHP 5 *AND* PHP 7 then that will be a total disaster.
>
> Of course you can have a single codebase running both on PHP5 and 
> PHP7, unless you want to use PHP7-only features.

It may be true right now, but it is not inevitable. There are certain 
behaviour or syntax changes that could, theoretically, require the same 
feature to be written differently in the two versions.

Luckily, such changes are rare, and are usually spotted and avoided (as 
with the change to DateTime typehinting mentioned recently), but it's 
not something that goes without saying.

Regards,

-- 
Rowan Collins
[IMSoP]