install latest php on ubuntu 18.04 code example

Example 1: install php 5.6 on ubuntu 18.04

$ sudo add-apt-repository ppa:ondrej/php

Example 2: install php 7.1 on ubuntu 18.04

sudo apt install php7.1 php7.1-common php7.1-opcache php7.1-mcrypt php7.1-cli php7.1-gd php7.1-curl php7.1-mysql