[rfc] normalize increment and decrement operators

Hi all, Following the earlier discussion of adding decrement for strings to complement the existing alphanumeric increment feature, I've written a proposal to normalize the behaviour across boolean and null values. https://wiki.php.net/rfc/normalize_inc_dec Based on some earlier comments, boolean and null values can be treated in two distinct way, both of which are demonstrated in the rfc; I'm hoping that before voting takes place we can eliminate one voting option altogether. It also aims to deprecate string-based increments using ++; instead, it would introduce str_inc() and str_dec() as a regular function. Let me know your thoughts. -- -- Tjerk