PHP 5.6 Installation in Ubuntu 20.04 – Step-by-step

Installing PHP 5.6

2. 2. Enabling PPA Repo

   Add PHP PPA for Ubuntu GNU/Linux

   Install PHP Repo for Ubuntu

   PHP PPA for Ubuntu

3. 3. Installing PHP 5.6

   Then to Install PHP 5.6 on Ubuntu
   Simply play:

   sudo apt install php5.6

4. 4. Setting PHP Version

   (Optional, for managing multiple Versions) And to Set PHP 5.6 as Default
   Use the update-alternatives Tool like:

   sudo update-alternatives --config php

   And then Choose the Right PHP release ID.

5. 5. Searching PHP 5.6 Extensions

   Again to Search PHP 5.6 Extensions
   Run:

   grep php- /var/lib/apt/lists/ppa.launchpad.net_ondrej_php*Packages