Seems like a terrible idea to me.

Thanks for you return, but a little too short…

You should take into consideration that most PHP applications do not check whether variables received in $_GET, $_POST and $_COOKIE are not arrays. The framework I use handles this validation for me but most people are not so lucky.

I think an error makes sense for array to string conversion. But concatenation is just a non-sense. Even worse behavior than simply returning "Array".

Updated the RFC, removing my previous opinion because the only thing I'm sure now, is that we should find a better solution than the current one.

@flaupretre What about fixing tests?

This RFC is withdrawn because the subject is far from mature and requires much more thoughts. Potential BC breaks also make it a candidate for a major release only.