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Date: Thu, 26 Apr 2012 16:50:22 +0200
Message-ID: <CADNQb0W3fkzheKVBNiSioGBmCMZOBuqT6N-dO2PTkz9cH48DfQ@mail.gmail.com>
To: Jordi Boggiano <j.boggiano@seld.be>
Cc: Christian Stocker <christian.stocker@liip.ch>, 
	=?UTF-8?Q?Johannes_Schl=C3=BCter?= <johannes@schlueters.de>, 
	"internals@lists.php.net" <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Extension versions
From: hannes.magnusson@gmail.com (Hannes Magnusson)

On Thu, Apr 26, 2012 at 16:09, Jordi Boggiano <j.boggiano@seld.be> wrote:
> On 26.04.2012 15:50, Christian Stocker wrote:
>> dom has the version 20031129 which is greater than 5. Not sure if anyone
>> really checks against that, since not much changed there since obviously
>> 2003 ;)
>
> Yup it's the only one I noticed but since it's fairly well established,
> usually you don't need to check if it's there (AFAIK).
>
>> But the problem with extensions like dom is the used libxml version
>> which actually causes problems, not the version of the extension itself.
>> There's a bug in libxml < 2.7.0 which can hit you hard for certain
>> namespaces. So getting just the version number won't help you here.
>>
>> But that's not something we have to take care of IMHO, one can get that
>> information with LIBXML_VERSION or LIBXML_DOTTED_VERSION
>
> True, and maybe we should actually expose libxml and other bundled libs
> as packages too via Composer. Could be handy.

libxml isn't bundled.. That is why its often hard to understand why
stuff works on one server but not the other :)
For many extensions wrapping external libraries it is more useful to
know the version of that lib then the extension.

-Hannes