I haven't had an issue where I've had CloudFlare filter requests to a PHPInfo page, it's pretty simple code for that system. It is however protected and must be accessed by an admin, you can see an example of this here on UBBCentral which has been running over CloudFlare for a while now.

I am a Web Development Contractor, I do not work for UBBCentral. I have provided free User to User Support since the beginning of these support forums.
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