How to do AB testing for WordPress on nginx?

Question

I have a large traffic WordPress site running on nginx which I want to do some AB testing for UX/thematic changes. Where is the best place to put the logic for this and ensure a 50/50 split of incoming traffic while monitoring?

Answer 1

These plugins should be useful in your quest to A/B test. They include test config & monitoring. I've used Optimizely before with success.