On 09.01.2017 at 11:10, Joe Watkins wrote:
> Morning Christoph,
>
> It is not clear what has been deprecated:
>
>> 21 June 2016, Expat 2.2.2 released
>
> Can you dig about some more and find out what's going on exactly please ?
Originally, ext/xml relied solely on libexpat[1], but in PHP 5 it was
rewritten to support also libxml[2] (apparently, all XML extensions had
been rewritten to support libxml back then[3]). The reason to switch to
libxml apparently was to have a common backend for all XML extensions[4].
The deprecation notice was introduced in commit 73415c9e[5] which was
about removing the bundled libexpat. I don't know whether there had
been any plans to remove libexpat support altogether sometime (and this
had simply be forgotten), or the deprecation notice had only been
introduced to express that libxml is preferred.
[1] <https://github.com/php/php-src/blob/PHP-4.4/ext/xml/config.m4>
[2] <https://github.com/php/php-src/blob/PHP-5.0/ext/xml/config.m4>
[3] <https://www.mail-archive.com/internals@lists.php.net/msg11050.html>
[4] <https://www.mail-archive.com/internals@lists.php.net/msg03676.html>
[5]
<https://github.com/php/php-src/commit/73415c9e#diff-eaaec22f50f9d41395bbe856ae4c5723>
Cheers,
Christoph
