3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { private $bar = []; public function doBar() { $this->bar[] = 'barring'; } } class Bar extends Foo { private $bar = []; public function getBar() { $this->doBar(); return $this->bar; } } $bar = new Bar(); var_dump($bar->getBar());

preferences:
33.77 ms | 402 KiB | 5 Q