Devops: How to swith PHP versions

Apache

sudo a2dismod php[x.y]
sudo a2enmod php[z.w]
sudo service apache2 restart

CLI

sudo update-alternatives --set php /usr/bin/php[z.w]
sudo update-alternatives --set phar /usr/bin/phar[z.w]
sudo update-alternatives --set phar.phar /usr/bin/phar.phar[z.w]

[x.y] = replace with the version to disabled = e.g. 5.6

[z.w] = replace with the version to enabled = e.g. 7.4