PHP 8.3: New features

[alexander-schranz]

Feature Request

I thought I put all things which are PHP 8.3 related into this issue.

Q	A
New Feature	yes
RFC	yes
BC Break	no

Summary

• Check if existing Generators work with PHP 8.3 (Add PHP 8.3 to supported PHP version #191)
• Typed class constants (https://wiki.php.net/rfc/typed_class_constants) (think const visibilty is also not already implemented, looks somebody already tried it but very complicated: Handle visibility and docblocks of constants #32)
• Dynamic class constant fetch (https://wiki.php.net/rfc/dynamic_class_constant_fetch)
• Anonymous readonly classes (https://github.com/php/php-src/blob/011071a3b3f0f60c3d8ff70479251ed8873f90ec/UPGRADING#L115) (think anonymous classes in general do not exist yet)

Based on https://stitcher.io/blog/new-in-php-83 I think this are the only features which could have effects and could make sense to add to laminas-code generators.