3v4l.org

run code in 300+ PHP versions simultaneously
<?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 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.13
object(Foo)#1 (1) { ["bar"]=> string(11) "hello world" }

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