Linux Aliases to Switch Amongs PHP Versions

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Assuming I have three different PHP versions on my system:

1. PHP 5.6
2. PHP 7.1
3. PHP 7.2

To switch two between versions, add these aliases into your ~/.bashrc file:

alias php5671='sudo a2dismod php5.6 ; sudo a2enmod php7.1 ; sudo service apache2 restart ; echo 2 | sudo update-alternatives --config php'
alias php5672='sudo a2dismod php5.6 ; sudo a2enmod php7.2 ; sudo service apache2 restart ; echo 3 | sudo update-alternatives --config php'
alias php7156='sudo a2dismod php7.1 ; sudo a2enmod php5.6 ; sudo service apache2 restart ; echo 1 | sudo update-alternatives --config php'
alias php7172='sudo a2dismod php7.1 ; sudo a2enmod php7.2 ; sudo service apache2 restart ; echo 3 | sudo update-alternatives --config php'
alias php7256='sudo a2dismod php7.2 ; sudo a2enmod php5.6 ; sudo service apache2 restart ; echo 1 | sudo update-alternatives --config php'
alias php7271='sudo a2dismod php7.2 ; sudo a2enmod php7.1 ; sudo service apache2 restart ; echo 2 | sudo update-alternatives --config php'

To activate the alias, type command:

source ~/.bashrc

And you're on.

Type 'php5672' in terminal to switch between PHP 5.6 to PHP 7.2.