I would like to put the current time/date into a hidden text field with the format 19:19:09 Sep 27, 2011
<input type="hidden" name="current_date" value="<?php echo date('H:i:s M d, Y'); ?>" readonly="readonly">
But you should know that the user can change the value easily.
Edit: Use date_default_timezone_set to set the timezone.
The timezone of Australia is listed here: http://www.php.net/manual/en/timezones.australia.php
http://php.net/manual/en/function.date.php
<?php
// Assuming today is March 10th, 2001, 5:16:18 pm, and that we are in the
// Mountain Standard Time (MST) Time Zone
$today = date("F j, Y, g:i a"); // March 10, 2001, 5:16 pm
$today = date("m.d.y"); // 03.10.01
$today = date("j, n, Y"); // 10, 3, 2001
$today = date("Ymd"); // 20010310
$today = date('h-i-s, j-m-y, it is w Day'); // 05-16-18, 10-03-01, 1631 1618 6 Satpm01
$today = date('\i\t \i\s \t\h\e jS \d\a\y.'); // it is the 10th day.
$today = date("D M j G:i:s T Y"); // Sat Mar 10 17:16:18 MST 2001
$today = date('H:m:s \m \i\s\ \m\o\n\t\h'); // 17:03:18 m is month
$today = date("H:i:s"); // 17:16:18
?>
<input type="hidden" name="current_date" value="<?php echo $today?>" readonly="readonly">