3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Pizza { protected $blat; protected $sus; protected $topping; public function toString() { return $blat . ' ' . $sus . ' ' . $topping; } } class NyPizza extends Pizza { public function __construct() { echo 'works'; } } $pizza = new NyPizza();
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
works

preferences:
239.79 ms | 404 KiB | 378 Q