3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1 = ["foo" => "bar"]; $a2 = ["foo" => "baz"]; var_dump($a1 + $a2 == $a2 + $a1);
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
bool(false)

preferences:
61.72 ms | 406 KiB | 5 Q