Kāpēc, F3llony, jānoslogo lieki serveris?
$username = mysql_real_escape_sring( $_POST['username'] );
$password = mysql_real_escape_sring( $_POST['password'] );
$time = time(); // Register globals is turned off.
mysql_query("
INSERT INTO `users` ( `username`,`password`, time` )
VALUES ( '{$username}', '{$password}', '{$time}' )
LIMIT 1
") or exit;