Steps to take to effectively increase PHP requirements in Piwik:
Follows up: #8156
increase requirements in source code: https://github.com/piwik/piwik/blob/master/core/testMinimumPhpVersion.php
is done. We need to decide if we require at least 5.5.0 or maybe a little higher version such as 5.5.9 . Not sure if there are some weird problems etc in 5.5.0 or 5.5.1 ...
Drupal 8 (https://www.drupal.org/docs/7/system-requirements/overview and https://www.drupal.org/node/2508231 ) and Symfony (http://symfony.com/doc/current/reference/requirements.html ) require PHP 5.5.9 so it might be a good idea to directly require 5.5.9 as well. Gives us the possibility to use some Symfony components eventually etc
Other projects used PHP 5.5.9 for new requirement, as well. So guess that should be fine.
Awesome. Seeing Guzzle and the AWS SDK require 5.5.9 as well. Guzzle might be interesting for us to use eventually.
@matt can you confirm re 5.5.9 re usage of Piwik etc?