Our current vbulletin software , last I checked, could not run on php 7.2. I was planning to install xenforo on the same server and run side by side as we imported vbulletin over and tested things. Can xenforo 2 run on php 7.1? Is the php 7.2 a requirement or just a suggestion? We'd convert to 7.2 once we have things setup, but I'm just trying to figure out our upgrade plan.