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Date: Sun, 3 Feb 2013 11:44:35 -0800
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Subject: Re: [PHP-DEV] Proposal for serious BC compatibility aka language versioning
From: karoly@negyesi.net (Karoly Negyesi)

Well, either I misunderstood the policy or it's broken. Here are some
(note: please do not argue whether these are more correct than before,
they very well might be but they broke backwards compatibility):

For example, in 5.4 array_diff_assoc began to throw a notice when
casting to string.

Again in 5.4, using a string offset against a string throws a warning.
It wasn't doing that before.

If you want I can dig around in our issue queue for more backwards
compatibility breaks but there are some.

Regards,

Karoly Negyesi


On Sun, Feb 3, 2013 at 4:19 AM, Pierre Joye <pierre.php@gmail.com> wrote:
> hi,
>
> On Sun, Feb 3, 2013 at 12:36 PM, Karoly Negyesi <karoly@negyesi.net> wrote:
>> Hi,
>>
>> So, if we are talking about PHP 6, then the opening <?php tag should be
>> accompanied by the version it was written for, it was tested with and then
>> the engine could switch to a compatibility mode for that version.
>>
>> Seems to me that this would solve the problem where a host can't upgrade to
>> a more modern version for fear of breaking old code. Consequently, open
>> source packages -- like Drupal I am deeply involved with -- can't use more
>> modern PHP versions decreasing the "push" for hosts to upgrade. This is a
>> devilish circle and it'd be great to break it.
>
> We have been there, no chance to go back again with such tags.
>
> Also the new release process RFC
> (https://wiki.php.net/rfc/releaseprocess) solves the BC issues between
> minor updates (5.4 to 5.5, or 5.3 to 5.4 f.e.). It is our and our
> users role to explain that to their ISPs, admins, etc.
>
> Cheers,
> --
> Pierre
>
> @pierrejoye