Description:
------------
This bug seems to be identical to http://bugs.php.net/bug.php?id=45545 which was marked closed.

It appears than when part of the interval is greater than 9999 the DateInterval throws an exception.

DateInterval::__construct(): Unknown or bad format (PT10000M);

This happens with years, days, hours, minutes, and seconds

Reproduce code:
---------------
$i = 900;
while ($i) {
        try {
                $di = new DateInterval('PT' . $i . 'M');
        }
        catch (exception $e) {
                var_dump($i);
                echo $e->getMessage();
                break;
        }
        $i++;
}

Expected result:
----------------
I would expect to have a DateInterval object with interval ('PT1000M') or greater.

Actual result:
--------------
DateInterval::__construct(): Unknown or bad format (PT10000M);