- Add repo ppa
Assuming libapache2-mod-php is a suitable way to enable PHP in Apache for you, you can proceed in this way:
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt-get install php7.0 php5.6 php5.6-mysql php-gettext php5.6-mbstring php-xdebug libapache2-mod-php5.6 libapache2-mod-php7.0
- Switch PHP version:
From php5.6 to php7.0 :
Apache:
sudo a2dismod php5.6 ; sudo a2enmod php7.0 ; sudo service apache2 restart
CLI:
sudo ln -sfn /usr/bin/php7.0 /etc/alternatives/php
From php7.0 to php5.6:
Apache:
sudo a2dismod php7.0 ; sudo a2enmod php5.6 ; sudo service apache2 restart
CLI:
sudo ln -sfn /usr/bin/php5.6 /etc/alternatives/php