3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { public $bar; } var_dump(new Foo); $foo = new Foo; unset($foo->bar); var_dump($foo);
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.21, 8.3.0 - 8.3.9
object(Foo)#1 (1) { ["bar"]=> NULL } object(Foo)#1 (0) { }

preferences:
211.37 ms | 404 KiB | 218 Q