function array_merge_recursive_unique($array1, $array2)
	{
		$arrays = func_get_args();
		$narrays = count($arrays);
		$ret = $arrays[0];
		for ($i = 1; $i < $narrays; $i ++) {
			foreach ($arrays[$i] as $key => $value) {
				if (((string) $key) === ((string)((int) $key))) { // integer or string as integer key - append
					$ret[] = $value;
				} else { // string key - merge
					if (is_array($value) && isset($ret[$key])) {
						$ret[$key] = $this->array_merge_recursive_unique($ret[$key], $value);
					} else {
						$ret[$key] = $value;
					}
				}
			}
		}
		return $ret;
	}