r::sanitize PHP Method

    static function sanitize($data)
    {
        foreach ($data as $key => $value) {
            if (!is_array($value)) {
                $value = trim(str::stripslashes($value));
            } else {
                $value = self::sanitize($value);
            }
            $data[$key] = $value;
        }
        return $data;
    }