How To Install different version of PHP on Ubuntu

Tested on: Ubuntu 22.04

Default php version is 8.1 and we want install php 7.4

Ondrej PPA contains PHP 8.2, 8.1, 8.0, 7.4, 7.3, 7.2, 7.1, 7.0 & PHP 5.6 packages.

First update the system

1. Check Active PHP Version

2. Install php on system

Set the required PPA wich contains any PHP version.

1. Install dependancy:
   
   sudo apt install software-properties-common ca-certificates lsb-release apt-transport-https

   1	sudo apt install software-properties-common ca-certificates lsb-release apt-transport-https

2. Enable Ondrej PPA 
   
   LC_ALL=C.UTF-8 sudo add-apt-repository ppa:ondrej/php

   1	LC_ALL=C.UTF-8 sudo add-apt-repository ppa:ondrej/php

3. Update the Apt package manager cache.
   
   sudo apt update

   1	sudo apt update

4.  PHP versions on your system.
   • Install PHP 7.4:
     
     sudo apt install php7.4

     1	sudo apt install php7.4

     
     

   You can install multiple PHP versions on a single Ubuntu system.

 

1. PHP applications depend on various extensions to extend their features. That can also be installed using the following syntax:
   
   sudo apt install php7.4-[extension]

   1	sudo apt install php7.4-[extension]

   
   for example:
   
   sudo apt install php7.4-interbase php7.4-mbstring php7.4-curl

   1	sudo apt install php7.4-interbase php7.4-mbstring php7.4-curl

   
   Users who have installed different PHP versions, need to replace 8.2 with the required PHP versions.

 

3. Choose Default PHP Version 

with update-alternatives command you can set the default version you want to be active in your system

4. Removing PHP

If you want to remove the php version 8.1 from your system you can do:

Also, uninstall all the modules for that version with the following command: