<?
function don_bebegim($dt)
{
$yil=strval(substr($dt,6,4));
$ay=strval(substr($dt,3,2));
$gun=strval(substr($dt,0,2));
$sa=intval(strval(substr($dt,11,2)));
$dk=intval(strval(substr($dt,14,2)));
$sn=intval(strval(substr($dt,17,2)));
return mktime($sa,$dk,$sn,$ay,$gun,$yil);
}

echo  don_bebegim("21-08-2008");
?>