PHP - Mutidimensional array diff

Question

i would like to ask for your help since I\'m having difficulty resolving this matter. I had created a function to facilitate on array diff but it does not suffice to my need

Answer 1

This should do it, assuming all keys occur in both arrays:

$diff = array();
foreach ($session as $key => $values) {
    $diff[$key] = array_diff($values, $post[$key]);
}

Or, because I'm bored and array_map is underused:

$diff = array_combine(
    array_keys($session),
    array_map(function ($a, $b) { return array_diff($a, $b); }, $session, $post)
);

(Assumed well ordered arrays though.)