sudo apt-get install python-software-properties
sudo LC_ALL=C.UTF-8 add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt-get install php7.0 php7.0-fpm php7.0-mysql -y
purge php5
sudo apt-get remove php5-common -y
cleanup
sudo apt-get --purge autoremove -y
Thanks, this worked beautifully using Crouton on a Chromebook!