I'm wondering if we still need to support PHP 5.3.

http://blog.ircmaxell.com/2014/12/on-php-version-requirements.html

I'd rather bump the minimum version up to PHP 5.5, and know people have been talking about doing the same for MediaWiki itself. My question is if this can already be done without making Wikibase undeployable on WMF servers. Is everything running HHVM yet, or is there some stuff relevant to Wikibase that still runs an unsupported version of PHP?

Cheers

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Jeroen De Dauw - http://www.bn2vs.com