Online PHP editor | output for P2XSm

<?php interface Runnable { public function run(string $details): void; } abstract class RunnableBase implements Runnable { public function run(string $more): void { echo $more . "\n"; } } class Impl1 extends RunnableBase { public function run(string $extra): void { parent::run($extra); } } class Impl2 extends RunnableBase { public function run(string $other): void { parent::run($other); } } function getRunnable(): Runnable { if (time() % 2) { return new Impl1(); } else { return new Impl2(); } } $a = getRunnable(); try { // This is the only name that is known at compile time and what I would expect to work. $a->run(details: 'details'); } catch (Throwable $e) { echo $e->getMessage() . "\n"; } try { // I wouldn't expect this to work as it's just an implementation detail. $a->run(more: 'more'); } catch (Throwable $e) { echo $e->getMessage() . "\n"; } try { // I would absolutely never expect this to work, because it is -random-. $a->run(extra: 'extra'); } catch (Throwable $e) { echo $e->getMessage() . "\n"; } try { // I would absolutely never expect this to work, because it is -random-. $a->run(other: 'other'); } catch (Throwable $e) { echo $e->getMessage() . "\n"; }