On: How PHP's foreach works

[nkozyra]

So basically it operates on a copy unless it determines it doesn't need to?

I'm not sure why this is interesting.

[wvenable → nkozyra]

It's even less interesting because PHP arrays have value semantics so someFunc($array) and foreach($array..) aren't really that different. The whole thing is pretty intuitive.

The answer to the question is pretty deep though.