The different PHP versions unter Plesk ODIN are situated in /opt/plesk/php/. So the PHP paths are for example: /opt/plesk/php/5.2/bin/php /opt/plesk/php/5.3/bin/php /opt/plesk/php/5.4/bin/php /opt/plesk/php/5.5/bin/php /opt/plesk/php/5.6/bin/php /opt/plesk/php/7.0/bin/php Which PHP versions are available depends on the versions installed. You can see your installed versions under https://yourdomain.com:8443/admin/php-handler/list/ in the Plesk backend.