Iphone: Will It Ring If I Turn It Off?

When I turn my iphone off, could it somehow turn back on? I don't know, has it happen to you?

If it's off, it's off. It probably got hit by something and turned on.

No, when an iPhone is turned off, it shouldn't ring. However, you may have accidentally turned it on? Or never properly turned it off? It's never happened to me before.

Off means off.