I have a development site and production site:
I have a mailto email link at the bottom, the php source code is ex
This isn't related to ColdFusion. In this code, cf-hash is an attribute of a SCRIPT tag (plain HTML). Searching on 'cf-hash="f9e31" gets a lot of similar code out there. Found this link that points to it possibly being a CloudFlare Email Protection script. That would be something running on your production server that's not in your local development environment.