install php 8 on ubuntu 18.04 LTS code example

Example 1: install php 8 ubuntu

sudo apt install php8.0-cli php8.0-common php8.0-imap php8.0-redis php8.0-snmp php8.0-xml

Example 2: install php 5.6 on ubuntu 18.04

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