Set/change PHP version command [Ubuntu/Debian]

Command to change PHP version in system and Apache2 with multiple PHP versions installed (from https://launchpad.net/~ondrej/+archive/ubuntu/php )

#!/bin/sh

if [ -z "$1" ]
then
        echo 'PHP version required'
else
        if test -f "/usr/bin/php"$1; then
                sudo a2dismod php7.0 > /dev/null
                sudo a2dismod php7.1 > /dev/null
                sudo a2dismod php7.2 > /dev/null
                sudo a2dismod php7.3 > /dev/null
                sudo a2dismod php7.4 > /dev/null
                sudo a2enmod php$1 > /dev/null
                systemctl restart apache2

                sudo ln -fs /usr/bin/php$1 /etc/alternatives/php
                sudo ln -fs /usr/bin/php-config$1 /etc/alternatives/php-config
                sudo ln -fs /usr/bin/phpdbg$1 /etc/alternatives/phpdbg
                sudo ln -fs /usr/bin/phpize$1 /etc/alternatives/phpize
                sudo ln -fs /usr/bin/phar$1 /etc/alternatives/phar
                sudo ln -fs /usr/bin/phar.phar$1 /etc/alternatives/phar.phar
                echo 'Changed PHP version to: '$1
        else
                echo 'Wrong PHP version: '$1
        fi
fi

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