Testing whether "!$this" is true makes absolutely no sense. Either we're in an objec...

Testing whether "!$this" is true makes absolutely no sense.  Either we're in an object context, in which case it's always true; or we're not, like if the method was called statically, in which case the code is seriously buggy and *should* crash with a fatal error so we can fix it ASAP (which it will, now, on the next line when a method of $this is called).