php 7.0 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 software-properties-commonsudo add-apt-repository ppa:ondrej/php
$ sudo add-apt-repository ppa:ondrej/php
sudo apt install software-properties-commonsudo add-apt-repository ppa:ondrej/php