Topic on Talk:Beta Features/PHP7

I am amazed by the possibility to enable something as deeply server-side as PHP7 in the beta preferences, with a single click, for only those who would like to participate in the beta project. Thank you for making both PHP7 and this beta test possible.

I haven't looked into the mechanism in use but I wouldn't be surprised if it's a simple cookie or something that indicates to varnish to send to a different server, or to apache to handle differently or something. But yes, yay for testing new stuff.