PHP 8.1 Ubuntu 21.10 Installation – Step-by-step

Installing PHP

2. 2. Enabling PPA Repo

   Add PHP PPA for Ubuntu GNU/Linux

   Add PHP Repo for Ubuntu

   PHP PPA for Ubuntu

3. 3. Installing PHP 8.1

   Now to Install PHP 8.1 on Ubuntu
   Simply play:

   sudo apt install php8.1 php8.1-cli

   This Setup includes also the most useful Extensions and Tools.
   Then Test your new Php with:

   php -v

4. 4. Searching PHP 8.1 Extensions

   Again to Search PHP 8.1 Extensions.

   So you can Search for the available PHP 8 Extensions running:

   sudo apt search php8.1

   And possibily refine the Result using a grep Pipe

   sudo apt search php8.1 | grep [KEYWORD]

   Like for instance:

   sudo apt search php8.1 | grep mysql

   

   Last, to Install multiple Packages at once you may use the following Syntax:

   sudo apt install php8.1-{curl,xml,imagick,mysql,fpm,bz2}

5. 5. Setting PHP Version

   (Optional) In case to Manage Multiple PHP Versions on System
   Use the Default CLI Tool:

   sudo update-alternatives --config php

   If more than One then Simply Choose the Right PHP Release Entry.