upgrade php 8 ubuntu 20.04
# php -v (default PHP version)
# From PHP 8.0 to PHP 7.4:
sudo a2dismod php8.0
sudo a2enmod php7.4
sudo update-alternatives --set php /usr/bin/php7.4
sudo service apache2 restart
# From PHP 7.4 to PHP 8.0:
sudo a2dismod php7.4
sudo a2enmod php8.0
sudo update-alternatives --set php /usr/bin/php8.0
sudo service apache2 restartswitch php version ubuntu 20.04
# This might be a longer process but it worked for me
# firstly completely remove the current PHP present in your OS (ubuntu)
# command to remove > sudo apt-get purge php7.*
# next command > sudo apt autoremove -y
# now install the php version you want with the command > sudo apt-get install php7.2 libapache2-mod-php7.2 php7.2-mcrypt php7.2-mysqlCopyright © 2021 Codeinu
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