chamilo / chamilo-lms

		$values = api_get_utc_datetime($timestamp);

		$values = str_replace(array(':','-',' '), '/', $values);

		list($y, $m, $d, $h, $n, $s) = split('/',$values);

		if($m+$num>12) {

			$y += floor($num/12);

			$m += $num%12;

		} else {

			$m += $num;

		}

		//date_default_timezone_set('UTC');

		// return mktime($h, $n, $s, $m, $d, $y);

		$result = api_strtotime($y.'-'.$m.'-'.$d.' '.$h.':'.$n.':'.$s, 'UTC');

    function addMonth($timestamp, $num = 1)

    {

        list($y, $m, $d, $h, $n, $s) = split('/', date('Y/m/d/h/i/s', $timestamp));

        if ($m + $num > 12) {

            $y += floor($num / 12);

            $m += $num % 12;

        } else {

            $m += $num;

        }

        return mktime($h, $n, $s, $m, $d, $y);

    }