Online PHP editor | refs for FrhLN

<?php declare(strict_types=1); final class Foo { public readonly ?int $id; } $object = new Foo(); $reflection = new ReflectionClass($object); $instance = $reflection->newInstanceWithoutConstructor(); $reflectionProperty = $reflection->getProperty('id'); $reflectionProperty->setValue($instance, 42); $reflectionProperty->setValue($instance, null); var_dump($reflectionProperty->getValue($instance));