array_diff_assoc_recursive.php

<?php

function array_diff_assoc_recursive($array1, $array2)
{
    $difference = array();
    
    foreach ($array1 as $key => $value) {
        if (is_array($value)) {
            if (!isset($array2[$key]) || !is_array($array2[$key])) {
                $difference[$key] = $value;
            } else {
                $new_diff = array_diff_assoc_recursive($value, $array2[$key]);
                if (!empty($new_diff)) {
                    $difference[$key] = $new_diff;
                }
            }
        } elseif (!array_key_exists($key, $array2) || $array2[$key] !== $value) {
            $difference[$key] = $value;
        }
    }
    
    return $difference;
}