Catching exceptions and returning a 200 OK blank page is about the worst thing that PHP is doing. A simple error can trash your google index (Oh, page replaced by blank content, fine!) or mess up API communication when the receiver does not explicitly check for the response content (POST to endpoint, 200 OK, ok, nice). And while you can catch and handle some of those errors with your own error handlers, there are error classes that you can not handle and which will always be handled internally. It's a pure mess.
