implementing JSON Serialization of DateTimeImmutable in PHP 8.1
I'm stuck on something that should probably be simple. I've searched everywhere and can't find a clear answer. I'm working with a question when trying to serialize a `DateTimeImmutable` object to JSON in PHP 8.1. Whenever I attempt to return a JSON response containing this object, I get the behavior: `Uncaught TypeError: DateTimeImmutable::jsonSerialize(): Return value must be of type array|string|null, object returned`. My function looks like this: ```php public function getEventDetails($eventId) { $event = $this->eventRepository->find($eventId); return json_encode([ 'id' => $event->getId(), 'name' => $event->getName(), 'start_time' => $event->getStartTime() // DateTimeImmutable ]); } ``` Here, `getStartTime()` returns a `DateTimeImmutable` instance. I’ve tried using `->format('Y-m-d H:i:s')`, but that seems to defeat the purpose of using `DateTimeImmutable`. I also looked into implementing `JsonSerializable` in my model, but that feels like overkill for just one field. What’s the best practice to handle this serialization without running into type errors? Is there a simpler approach I might be overlooking? Any suggestions would be greatly appreciated! I'd really appreciate any guidance on this. I'm working on a service that needs to handle this. What am I doing wrong?