Čo znamená <?= ?

<script type="text/javascript">
        <?php
         $date = getDate();

         $second = $date["seconds"];
         $minute = $date["minutes"];
         $hour = $date["hours"];
         $day = $date["mday"];
         $month = $date["mon"];
         $month_name = $date["month"];
         $year = $date["year"];
         ?>

         Server_Date = (new Date(<?= $year - 2000 ?>, <?= $month ?>, <?= $day ?>, <?= $hour ?>, <?= $minute ?>, <?= $second ?>)).getTime();
</script>