3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { private string $bar = "foo"; private function foo(): array {} } class Bar extends Foo { private array $bar = []; private function foo($foo): int {} } class Baz extends Bar { public self $bar; } $baz = new Baz(); $baz->bar = $baz; var_dump($baz);

preferences:
22.9 ms | 404 KiB | 5 Q