On Tue, Oct 12, 2021 at 3:52 PM Levi Morrison email@example.com>
> > Based on the received feedback, I've updated the RFC to instead provide
> > #[AllowDynamicProperties] attribute as a way to opt-in to the use of
> > dynamic properties. As previously discussed, this won't allow us to
> > completely remove dynamic properties from the language model anymore, but
> > it will make the upgrade path smoother by avoiding multiple inheritance
> > issues.
> Quoting the updated RFC:
> > We may still wish to remove dynamic properties entirely at some later
> > point. Having the #[AllowDynamicProperties] attribute will make it much
> > easier to evaluate such a move, as it will be easier to analyze how much
> > and in what way dynamic properties are used in the ecosystem.
> But in this place it does not mention PHP 9.0. Other places still
> mention converting it to an error for PHP 9.0. Is that still the plan?
The current RFC proposes to make dynamic properties an error for classes
without #[AllowDynamicProperties] in PHP 9.0. On the other hand, classes
using the attribute will be able to continue using dynamic properties
without error. (That is, as usual: Deprecations are converted to error in
the next major version.)