You can of course argue that any major update that breaks backwards combability the slightest is a dialect of the previous version, but that is just silly. -

You can of course argue that any major update that breaks backwards combability the slightest is a dialect of the previous version, but that is just silly. - Looking for PHP 8.2 dialect programmers! - I have only coded in PHP 8.1 dialect. - Sorry, won't do. The changelog tells you want you need to fix on existing code when upgrading and the manual usually gives you a workaround if it is something larger. And in this specific case you just add the attribute #[AllowDynamicProperties] to you dynamic class and be done with it.