php -v
PHP 5.6.3 (cli) (built: Oct 28 2015 09:47:41)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2014 Zend Technologies
But this only changes in CLI. You have to tweak you nginx(same for apache) to make it works. Nginx will still using the native PHP-FPM.
> ps aux | grep php-fpm