Re: [RFC] [Discussion] Literal Scalar Types

It may be worth mentioning that within the Pattern Matching RFC future scope, and mentioned a couple times within the discussion thread for the RFC, there is a similar proposal that would allow for this without using specific literal types. It's outlined in https://github.com/Crell/php-rfcs/blob/master/pattern-matching/future.md under "Parameter or return guards" It would allow for: ``` function setLogLevel (string $level is 'debug' | 'info' | 'warning' | 'error'): void {} ``` Of course, I don't think that a potential future scope of an in-draft RFC is reason to dismiss a more direct implementation of literal scalar types, but it may be useful to compare other ways we could achieve the same functionality. I personally find pattern matching within parameter/return types more versatile while keeping direct typing system more simplified. Specifically for a range feature that Ben Ramsey brought up, pattern matching for parameters seems much more appropriate. All that being said, I would gladly welcome literal scalar types. On Sun, Jun 14, 2026, 21:24 Seifeddine Gmati <azjezz@carthage.software> wrote: > Hello Internals, > > I'd like to start the discussion on a new RFC adding literal scalar > types to PHP. > > - RFC: https://wiki.php.net/rfc/literal_scalar_types > - Implementation: https://github.com/php/php-src/pull/22314 > > Thanks, > Seifeddine. >