- array_diff_assoc: documentation ( source)
- var_dump: documentation ( source)
- array_keys: documentation ( source)
<?php
$a = ['aa' => 4, 'cc' => 6];
$b = ['cc' => 6, 'aa' => 4];
var_dump(array_diff_assoc($a, $b));
var_dump($a === $b);
die;
var_dump(array_keys($a));
var_dump($a === $b);