how to install php 8 on ubuntu 18.04 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 8 ubuntu
sudo apt update
sudo apt install lsb-release ca-certificates apt-transport-https software-properties-common -y
sudo add-apt-repository ppa:ondrej/php