Were you aware that, according to the manual, the "getdate()" function returns:
..an associative array containing the date information of the timestamp, or the current local time if no timestamp is given...
For example if you are using a DATE field then you would need to code it something like this...
$date = getdate();
$sqldate = $date[year]."-".$date[mon]."-".$date[mday];
$sql = "insert into mynewads values ('$description', '$sqldate')";
This should give you the idea but I haven't tested it myself as I would normally set up the SQL like this:
$sql = "insert into mynewads values ('$description', now())";
Hope this helps