Install Install multiple PHP-versions and run them on a single 10.x or 11.x Plesk server.
Just run the script with root privileges and select a PHP-version.
Inspired by http://synec.de/2014/01/mehrere-php-versionen-in-plesk-11-5-unter-ubuntu-12-04/ and https://bitbucket.org/dansoap/plesk-php-install