Concept: 7.1 nullable function parameter format ...

> Issue: Currently the format for nullable function parameters is as > follows: `fn(?int $param)`; this makes little visual sense from an > outside perspective. What does the `?` mean? PHP does not have a `?` > data type; it is very visually ambiguous. > > Suggestion: `fn(null|int $param)`. This uses the same syntax format > that other logic constructs in the language use as well as being very > explicit to the data types allowed for the parameter. For the moment > only `null|{one other data type}` would be the goal of the RFC; > however in future iterations multiple data types could be allowed. > > Gauge initial interest in a alteratio of this type, thanks for your time.