See also this issue in Sparklines: #12065

• Probably we would need to enable the CI builds to run on PHP 7.2

Just some thoughts on the CI

Would if be a possible solution to use a cron trigger for "non-minimum PHP versions" like 7.x?

Using a special repository containing only one branch for each PHP version with a custom .travis.yml could trigger specific builds without completely overloading Travis. Using a special repository avoids messing with branching on the main repository and should still reasonably ensure support of different PHP versions.

It's a nice idea, but we found that it's easier to keep all the jobs into one build as otherwise it gets complicated and time consuming to follow all the builds.
Currently we run our builds on:

• UI tests on PHP 5.5
• all other tests on PHP 5.6 (both PDO MySql and Mysqli)

I reckon we only need to test the minimum version 5.5 and the maximum version ie. 7.2?
So maybe we could change to:

• UI tests on PHP 5.5
• Alltests suite (which runs Mysqli) on PHP 7.2
• Unit/integration/system (which runs on PDO) on PHP 5.6

or

• UI tests on PHP 5.5
• Alltests suite (which runs Mysqli) on PHP 5.5
• Unit/integration/system (which runs on PDO) on PHP 7.2

Now that 7.2 has been released for a month, more and more people are trying to run Piwik with it.

I am using it for a few weeks without any apparent issues. (But SearchEngineKeywordsPerformance is broken because of https://github.com/guzzle/guzzle/pull/1686 (fixed in guzzle 6.3))

But someone on the forum got an error message (once) while updating:
https://forum.piwik.org/t/count-parameter-must-be-an-array-or-an-object-that-implements-countable/26658?u=lukas

I am using it for a few weeks without any apparent issues. (But SearchEngineKeywordsPerformance is broken because of guzzle/guzzle#1686 (fixed in guzzle 6.3))

I'll check that and update dependencies for this plugin in the next release.

The plugin seems to be working fine, but it's throwing warnings because of changes in PHP7.2

Up to now, test are not even run against PHP 7.1.