The function unix2DosTime() case someone need.

unix2DosTime.php

<?php

function unix2DosTime($unixtime = 0) {
    $timearray = $unixtime ? getdate($unixtime) : getdate();

    if ($timearray['year'] < 1980) {
        $timearray['year']    = 1980;
        $timearray['mon']     = 1;
        $timearray['mday']    = 1;
        $timearray['hours']   = 0;
        $timearray['minutes'] = 0;
        $timearray['seconds'] = 0;
    }

    return (($timearray['year'] - 1980) << 25) 
            | ($timearray['mon'] << 21) 
            | ($timearray['mday'] << 16) 
            | ($timearray['hours'] << 11) 
            | ($timearray['minutes'] << 5) 
            | ($timearray['seconds'] >> 1);
}


echo $time = time(); // 1405091030
echo PHP_EOL; //
echo unix2DosTime($time); // 1156286585