protected static function strBrToUs($date)
    {
        if (is_string($date)) {
            $expreg = '/^(0[1-9]|[1-2][0-9]|3[0-1])\/(0[1-9]|1[0-2])\/(\d{4})(T| ){0,1}(([0-1][0-9]|[2][0-3]):([0-5][0-9]):([0-5][0-9])){0,1}$/';
            if (preg_match($expreg, $date, $datebit)) {
                @list($tudo, $dia, $mes, $ano, $tz, $time, $hora, $min, $seg) = $datebit;

                return "$ano-$mes-$dia" . ($hora | $min | $seg ? "$hora:$min:$seg" : "");
            }
        }
        return null;
    }