Jordi Boggiano, creator of Composer and it's main repository Packagist, posted some very interesting data regarding the most commonly used PHP versions.

It's that time of the year again, where I figure it's time to update my yearly data on PHP version usage. Last year's post showed 5.5 as the main winner and 5.3 declining rapidly. Let's see what 2015 brought.

http://seld.be/notes/php-versions-stats-2015-edition