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<?php class Test implements JsonSerializable { private $name = 'Mike Jones'; public function jsonSerialize() { return [ 'name' => $this->name, 'fooo' => ['year' => 2003, 'type' => 'single'] ]; } } var_dump(json_encode(new Test()));
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/9Xp0a on line 10 string(58) "{"name":"Mike Jones","fooo":{"year":2003,"type":"single"}}"

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