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<?php class Foo { public function __construct( public readonly int $bar, ) {} } $foo = new Foo(1); $ao = new ArrayObject($foo); $ao['bar'] = 'hello world'; var_dump($foo);
Output for git.master_jit, git.master, rfc.property-hooks
object(Foo)#1 (1) { ["bar"]=> string(11) "hello world" }

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