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lang-php
finalas expected. There’s nothing wrong with that. And using a language feature to enforce a constraint is always superior to using a comment.finalshould denote "No subclass of this class should ever be created" (for legal reasons or something), not "this class currently has no children, so I'm still safe to mess with its protected members". The intent offinalis the very antithesis of "freely editable", and afinalclass shouldn't even have anyprotectedmembers!finalmeans, “this class is not to be extended [for now].” Nothing more, nothing less. Whether PHP was designed with this philosophy in mind is irrelevant: it has thefinalkeyword, after all. Secondly, arguing from PHP’s design is bound to fail, given how patchworky and just overall badly PHP is designed.finalclass after all, you can look at the class design, decide whether it is safe to extend, fix it if it isn't, then remove thefinalkeyword. In effect, you refactor the class fromfinalto non-final. Then you can extend it. Seems reasonable to me.