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<?php class C implements JsonSerializable { public function jsonSerialize() { $a = clone($this); echo 1; die; } } echo json_encode(new C());
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of C::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/pl1uG on line 5 1

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