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<?php abstract class AbstractEvent { protected $id; private $hidden; } class Event extends AbstractEvent implements JsonSerializable { private $value; public function jsonSerialize() { return get_object_vars(); } } $e = new Event(); echo json_encode($e);
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of Event::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/4eb9N on line 14 Fatal error: Uncaught ArgumentCountError: get_object_vars() expects exactly 1 argument, 0 given in /in/4eb9N:16 Stack trace: #0 /in/4eb9N(16): get_object_vars() #1 [internal function]: Event->jsonSerialize() #2 /in/4eb9N(21): json_encode(Object(Event)) #3 {main} thrown in /in/4eb9N on line 16
Process exited with code 255.

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