In an effort to always keep your websites up to date and secure, all of our cPanel and Cloud hosting servers will be updated to PHP 5.6 as a minimum on 31st Oct 2017 as support and security updates for 5.3, 5.4 and 5.5 are not available. This does not affect any of our Sitebuilder Users.
php.net has stated that Users of these releases should upgrade as soon as possible, as they may be exposed to unpatched security vulnerabilities.
What is php? Read here.