Getting rid of PHP_Incomplete_Class and "unserialize_callback_func"

Hello, I recently submitted https://bugs.php.net/76681: Make unserialize() handle a new "callback" option entry The full story is that I'd like a way to get rid of any PHP_Incomplete_Class in my code. The way to do it currently is to change the "unserialize_callback_func" ini setting at runtime and define a throwing callable. But this feels like bad design... Do we want a better way to do it? Note that this should also apply to nested calls to unserialize (since the Serializable interface encourages doing so.) Nicolas