Install to php 8.0 the php8.1 and php8.2 and set for different sites in Ubuntu 22.04 and Apache 2.4.58

If you want to use different PHP versions on your sites, you have to use PHP FPM(FastCGI Process Manager).

1. Installing php8.1 and php8.2

Some of the PHP versions you want are not in the official repos, so you can use ppa:ondrej/php repository:

sudo apt install software-properties-common
sudo add-apt-repository ppa:ondrej/php
sudo apt update
sudo apt upgrade

Install PHP FPM and required extensions:

sudo apt install php8.0-fpm
sudo apt install php8.1-fpm
sudo apt install php8.2-fpm

sudo a2enmod proxy_fcgi
sudo service apache2 restart

You also have to install the required PHP extensions by the sites/apps you want to run. For example if your PHP8.2 site need MySQL you will have to install that too:

sudo apt install php8.2-mysql

2. Set the PHP version for every site

Edit your Apache2 vhost configs for each site in /etc/apache2/sites-available/. Between <VirtualHost> and </VirtualHost>, add the following code (replace 8.1 with the version you want for each site):

<FilesMatch .php$>
    SetHandler "proxy:unix:/var/run/php/php8.1-fpm.sock|fcgi://localhost/"
</FilesMatch>

You have to add these line to your -le-ssl.conf files too. For example /etc/apache2/sites-available/mo.stefan-franz.de-le-ssl.conf should look like this:

<IfModule mod_ssl.c>
<VirtualHost *:443>
ServerAdmin info@stefan-franz.de
DocumentRoot /var/www/html/moodle/
ServerName  mo.stefan-franz.de

<Directory /var/www/html/moodle/>
Options +FollowSymlinks
AllowOverride All
Require all granted
</Directory>

<FilesMatch .php$>
    SetHandler "proxy:unix:/run/php/php8.1-fpm.sock|fcgi://localhost/"
</FilesMatch>

ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined


SSLCertificateFile /etc/letsencrypt/live/mo.stefan-franz.de/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/mo.stefan-franz.de/privkey.pem
Include /etc/letsencrypt/options-ssl-apache.conf
Header always set Strict-Transport-Security "max-age=31536000"
</VirtualHost>
</IfModule>

3. Use a specific PHP version for the cron

The php command in your cron is using the CLI version of PHP. You have to install the version specific php-cli package. You can use update-alternatives to configure which version php will use. For example if you want to use PHP 8.2 for php, do this:

sudo apt install php8.2-cli

sudo update-alternatives --set php /usr/bin/php8.2

Alternatively, you can use the command php8.2 instead of php in your cron.

To make changes to the settings in php.ini, you have several different files:

• Sites running PHP FPM 8.2:

  Edit: /etc/php/8.2/fpm/php.ini

  After changes to this file, you should restart the FPM service:

  sudo service php8.2-fpm restart
  

• Sites running PHP FPM 8.1:

  Edit: /etc/php/8.1/fpm/php.ini

  After changes to this file, you should restart the FPM service:

  sudo service php8.1-fpm restart
  

• Sites running PHP FPM 8.0:

  Edit: /etc/php/8.0/fpm/php.ini

  After changes to this file, you should restart the FPM service:

  sudo service php8.0-fpm restart
  

• Default for sites without SetHandler in their vhost config:

  Edit: /etc/php/8.1/apache2/php.ini

  After changes to this file, you should restart the Apache2 service:

  sudo service apache2 restart
  

• When using the command php from the cron (replace 8.2 with the version you set in update-alternatives):

  Edit: /etc/php/8.2/cli/php.ini