function dmy_to_ymd($dmy)
{
$d = substr($dmy, 0, 2);
$m = substr($dmy, 3, 2);
$y = substr($dmy, 6, 4);
return ymd($d, $m, $y);
}
function jumlah_hari($m, $y)
{
$ymd = ymd('01', $m, $y);
return date("t", strtotime($ymd));
}
