[RESULT] Warn about invalid strings in arithmetic

Hi again, The vote on the "Warn about invalid strings in arithmetic" RFC has now closed. It ran from 2016-03-20 to 2016-03-28. There were 29 votes in favour and there was one vote against, which is well over the required 2/3 majority, and so the RFC has been accepted for PHP 7.1. You can read the RFC and see how people voted here: https://wiki.php.net/rfc/invalid_strings_in_arithmetic Now that this has been accepted, I will move towards merging the patches to the interpreter and language specification. If anyone would like to look over my code to make sure I haven't missed something obvious, I would very much appreciate it. Thank you for voting!