This seems a strange criterion. Do you mean that you expect all programmers to have written in PHP? Or do you mean, you'd expect a competent programmer to pick

This seems a strange criterion. Do you mean that you expect all programmers to have written in PHP? Or do you mean, you'd expect a competent programmer to pick it up quickly? I've been programming professionally for 18 years, and informally for 30. The most contact I've had with PHP is changing a couple of strings in an internal script.