3v4l.org

run code in 500+ PHP versions simultaneously
<?php abstract class A { public readonly string $prop; public function writeFromA(): void { $this->prop = 'a'; } } final class B extends A { public readonly string $prop; } $object = new B(); $object->writeFromA();
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11

preferences:
31.85 ms | 1151 KiB | 7 Q