PHP Version Manager On Ubuntu 18.04

PHP Version Manager On Ubuntu 18.04

Get the information of PHP
==========================
$ sudo apt show php
OR
$ sudo apt show php -a


$ sudo apt install php // this will install default php version ( may be 7.2 )

T0 Install Different Versions Of PHP
====================================
$ sudo apt install python-software-properties
$ sudo add-apt-repository ppa:ondrej/php

$ sudo apt-get update

For Apache
==========
$ sudo apt install php5.6   [PHP 5.6]
$ sudo apt install php7.2   [PHP 7.2]

For Nginx
=========
$ sudo apt install php5.6-fpm   [PHP 5.6]
$ sudo apt install php7.2-fpm   [PHP 7.2]

To Install Required Modules
===========================
$ sudo apt install php5.6-cli php5.6-xml php5.6-mysql ...
$ sudo apt install php7.2-cli php7.2-xml php7.2-mysql ...

Set Default PHP Version in Ubuntu (i.e. from 7.2 to 5.6)
========================================================
$ sudo update-alternatives --set php /usr/bin/php5.6
$ sudo a2dismod php7.2
$ sudo a2enmod php5.6
$ sudo systemctl restart apache2

And so on