PHP 5.6 is now mature, and this will be the default version from today for all new accounts created. More power, and more security...
For existing accounts, we encourage you to upgrade to PHP 5.6 from your cPanel / PHP selector, if the compatability with your site allows it, reminder :
https://support.yoorshop.hosting/knowledgebase/1100/PHP-versions-extensions-and-cache.html
UPDATE 06th october 2020
At this date, the default PHP version is 7.3. You can always choose an older/newer PHP version via the PHP selector in your cPanel