[RFC] Reclassifying engine warnings

Hi internals, I think it's time to take a look at our existing warnings & notices in the engine, and think about whether their current classification is still appropriate. Error conditions like "undefined variable" only generating a notice is really quite mind-boggling. I've prepared an RFC with some suggested classifications, though there's room for bikeshedding here... https://wiki.php.net/rfc/engine_warnings Regards, Nikita