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<?php class Foo implements JSONSerializable { public $barPublic = 1; protected $barProtected = 2; private $barPrivate = 3; public function jsonSerialize() { return array( 'barPublic' => $this->barPublic, 'barProtected' => $this->barProtected, 'barPrivate' => $this->barPrivate, ); } } $foo = new Foo(); var_dump(json_encode($foo));
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of Foo::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/bSJWU on line 7 string(47) "{"barPublic":1,"barProtected":2,"barPrivate":3}"

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