RFC [Concept] - Interface Properties

Hello internals, Based on a few discussions I've had recently, my team and I couldn't think of any reason why we shouldn't have properties on interfaces as it is common for these to be specified in doc blocks currently. Timing-wise, this lines up well with dynamic properties being depreciated. I've thrown together a very quick POC, there are many tests and examples of how this could look. https://github.com/php/php-src/compare/master...Humni:php-src:feature/rfc-interface-properties Some of the key architectural decisions: - interfaces can implement the same property (exact type match only) - interface properties must be public - interface properties can't be static - interface properties can be readonly Open to feedback from everyone on this - keen to get the ball rolling quickly on it! Kind Regards, Nick