--TEST-- Backed enums round-tripped through parent document --SKIPIF-- --FILE-- $this->x, 'y' => $this->y, ]; } public function bsonUnserialize(array $data): void { if (isset($data['x'])) { $this->x = MyIntBackedEnum::from($data['x']); } if (isset($data['y'])) { $this->y = MyStringBackedEnum::from($data['y']); } } } $document = new MyDocument(MyIntBackedEnum::A, MyStringBackedEnum::A); var_dump(toPHP(fromPHP($document))); ?> ===DONE=== --EXPECTF-- object(MyDocument)#%d (%d) { ["x":"MyDocument":private]=> enum(MyIntBackedEnum::A) ["y":"MyDocument":private]=> enum(MyStringBackedEnum::A) } ===DONE===