how to uninstall php 8 in ubuntu 18.04 completely

The command will Uninstall Any of the PHP 8.X versions of PHP installed on your Server. Now we need to cleans obsolete deb-packages to do so we need to run autoclean command.

sudo apt-get purge php8.*

 Now we need to cleans obsolete deb-packages to do so we need to run autoclean command.

sudo apt-get autoclean

remove orphaned packages that are no longer needed from the system so run autoremove command just like this.

sudo apt-get autoremove