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<?php readonly class Foo { public function __construct( public int $value, ) {} } $foo = new Foo(42); var_dump($foo); $ao = new ArrayObject($foo); $ao['value'] = 666; var_dump($foo);
Output for git.master_jit, git.master
object(Foo)#1 (1) { ["value"]=> int(42) } object(Foo)#1 (1) { ["value"]=> int(666) }

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