- var_dump: documentation ( source)
<?php
$a = [1, 2, 3];
$b = [1, 2, 3];
$c = [3, 1, 2];
var_dump([
$a == $b, // same order, loose
$a === $b, // same order, strict
$a == $c, // diff order, loose
$a === $c // diff order, strict
]);