php hash form string to integer

Question

Does PHP have a built in function for doing string to integer hashes, something that\'s difficult to reverse?

Now, I know I can probably get away with doing an md5,

Answer 1

I don't think you will find anything builtin for that, but your idea with md5() is pretty good, actually. I couldn't imagine why you would need something else: couldn't be faster, couldn't be more stable, ...