[ HOW To ] Install PHP 7.2, 7.1, 7.0 on Ubuntu 16, 17

root@cloud:/home/ubuntu# apt update && apt upgrade && apt dist-upgrade

sudo apt-get install python-software-properties
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt-get install -y php7.2 # 7.1 / 7.0

php -v

Install PHP 7 Modules 

sudo apt-cache search php7*

sample

sudo apt-get install php7.2-mysql php7.2-curl php7.2-json php7.2-cgi php7.2-xsl php7.2-xml php7.2-gd

Congratulation! Enjoy the development with PHP 7