I'm using the Ubuntu PPA available at https://launchpad.net/~ondrej/ archive/ubuntu/php to run PHP 5.6 and 7.0 side-by-side, while I establish my migration-path for users. I have both PHP versions working side-by-side beautifully (PHP 5.6 as the primary and 7.0 as a separate "PHP Version"), with one exception: I don't seem to be able to set an explicit socket file location for the PHP version that I add as a separate "PHP Version". The primary PHP version provides the opportunity to enter a directory in which to store socket files. Why not provide the same option for the additional PHP version? It's as though that field is simply missing. Maybe there's a good reason for that. Fundamentally, the problem seems to be that if I switch the PHP version pull-down for the website from 5.6 to 7.0 or vice-versa, the target version tries to reload its daemon and the socket-file still exists from the origin version, the daemon for which is still running. Or something similar. This results in a 503 at the gateway layer, until I stop/start both PHP daemons in the correct order. If there is some better/simpler way to write the socket files for 5.6 and 7.0 to different directories? Thanks for any help!