3v4l.org

run code in 500+ PHP versions simultaneously
<?php class Foo { public function __construct(public array $foo = [1, 2, 3], public string $bar = 'baz') {} } var_dump(serialize(new Foo()));
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
string(74) "O:3:"Foo":2:{s:3:"foo";a:3:{i:0;i:1;i:1;i:2;i:2;i:3;}s:3:"bar";s:3:"baz";}"

preferences:
66.03 ms | 1022 KiB | 4 Q