[php-src] Issue #8296: Numeric casts must emit a warning it they do not make sense

Issue: https://github.com/php/php-src/issues/8296 Comment Author: iluuu1994 > his is about preventing the whole class of arrays, and not specific patterns of arrays We also throw when casting non-stringable objects to strings, while stringable objects are obviously allowed. > "just squeeze that into a number". It's a safe way of doing that which existed > since very old times and should stay. Yeah, that's a valid concern. (int)$foo !== 0 is probably a common pattern when 0 is not a valid value.