<?
function don_bebegim($dt)
{
$yil=strval(substr($dt,0,4));
$ay=strval(substr($dt,5,2));
$gun=strval(substr($dt,8,2));
$sa=strval(substr($dt,11,2));
$dk=strval(substr($dt,14,2));
$sn=strval(substr($dt,17,2));

return mktime($sa,$dk,$sn,$ay,$gun,$yil);
}

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