I want to create some special files that will be used for nothing for their internal data but rather if they exist it means something. There will be quite a few of them.
Can i create them using any extension in php and can i read them (just if exists) using any extension. Is there an extension that is normally used for such a thing. I dont want to use txt cause people have a habbit of opening those.
It has to be something oddball and php legal of course.
I was thinking of .uyt i googled it and it does not exist