西元轉民國 及 MS-DOS 版本編號

function DtoCh($dday, $st) {
//把西元日期改為民日期 $st為分隔符號
$tok= strtok($dday,$st);
$i  = 0;

while ($tok){
$d[$i]  =$tok;
$tok  = strtok($st) ;
$i   = $i+1 ;
}
$temp=strtok($d[2],' ');
$d[2]=$temp[0].$temp[1];

$d[0] = $d[0] - 1911 ;
$cday = $d[0]."/".$d[1]."/".$d[2] ;
return $cday ;
}

例子：
DtoCh("2011-12-08 15:54:27",'-') ==> 100/12/08

MS-DOS 版本編號：
Windows 98 (Windows 4.1), Windows 98 Second Edition
Windows Millennium Edition (Windows 4.9)

Windows NT 4.0
Windows 2000 (Windows NT 5.0)
Windows XP (Windows NT 5.1)
Windows Server 2003 (Windows NT 5.2)
Windows Vista (Windows NT 6.0)
Windows Server 2008 (Windows NT 6.0)
Windows 7 (Windows NT 6.1)
Windows Server 2008 R2 (Windows NT 6.1)
Windows Home Server
Windows 8 (Windows NT 6.2)