install php apt code example
Example 1: ubuntu install php
apt-get install php-pear php-fpm php-dev php-zip php-curl php-xmlrpc php-gd php-mysql php-mbstring php-xml libapache2-mod-php
Example 2: install php 7.1 on ubuntu 18.04
sudo apt install software-properties-commonsudo add-apt-repository ppa:ondrej/php