Upgrade to PHP 8.2

Below commands will install or upgrade your PHP to 8.2 on Ubuntu. I created this post so that I can use this as a reference for myself and maybe others as well.

# Update your system
sudo dpkg -l | grep php | tee packages.txt
sudo add-apt-repository ppa:ondrej/php # Press enter when prompted.
sudo apt update

# Install php 8.2 and other required modules
sudo apt install php8.2 php8.2-cli php8.2-{bz2,curl,mbstring,intl,xml,mysql}

sudo apt install php8.2-fpm
# OR
# sudo apt install libapache2-mod-php8.2

sudo a2enconf php8.2-fpm

# When upgrading from older PHP version:
sudo a2disconf php8.1-fpm

## Remove old packages if needed
sudo apt purge php8.1*

sudo a2enmod php8.2
sudo service apache2 restart

Also, after upgrading from 8.1 to 8.2, I was getting error message when browsing to a local site

Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 8.2.0".

This issue came from apache still using 8.1. I was able to resolve this by entiring removing php 8.1.

sudo apt remove php8.1-*

Make sure to restart apache after removing old php.