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<?php class Dummy implements JsonSerializable{ public function jsonSerialize() { global $flag; if ($flag) { exit; } else { return "xxxx"; } } } $array = array(new Dummy()); $array[] = "xxx"; register_shutdown_function(function() use($array) { global $flag; $flag = 0; var_dump(json_encode(array($array))); }); $flag = 1; var_dump(json_encode(array($array)));
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of Dummy::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/uSSZ6 on line 4 string(16) "[["xxxx","xxx"]]"

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