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<?php class test implements JsonSerializable { public $a = 2; public function JsonSerialize() { return array('b' => 2, 'test'=>$this); } } var_dump(json_encode(new test())); var_dump(json_last_error_msg());
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of test::JsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/o6p5G on line 5 bool(false) string(18) "Recursion detected"

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