Array merge recursive with save key

array_merge_recursive_save_keys.php

<?php
function array_merge_recursive_save_keys() {

        $arrays = func_get_args();
        $base = array_shift($arrays);

        foreach ($arrays as $array) {
            reset($base);
            foreach($array as $key => $value) {
                if (is_array($value) && @is_array($base[$key])) {
                    $base[$key] = self::array_merge_recursive_save_keys($base[$key], $value);
                } else {
                    $base[$key] = $value;
                }
            }
        }

        return $base;
    }