ubuntu update php to latest version code example
Example 1: change php version ubuntu
//In ubunutu
Default PHP 7.1 is set on your system and you need to switch to PHP 5.6
$ sudo a2dismod php7.1
$ sudo a2enmod php5.6
$ sudo service apache2 restart
sudo update-alternatives --set php /usr/bin/php5.6
Example 2: upgrade php to 7.3 ubuntu
sudo apt-get install software-properties-common
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install -y php7.3