To avail new features and security improvements on your website, you need to upgrade your PHP version. If you are running Ubuntu OS on any cloud server like AWS, Azure, GCP, etc. to run your website, then follow the steps for upgrading any php version to PHP 8.0.
Here are the very simple steps that you can follow to upgrade the PHP version to PHP 8.0.
First, you need to login using SSH through putty or terminal.