Can error messgaes be changed?

Question

I'm creating a form that asks the user's e-mail address and stores it in a MySQL db. The e-mail address is a primary key and defined as "Unique". When I test with a duplicate e-mail address I get the correct error message "Duplicate entry '[email protected]' for key 1", I'd really like to make this a little more meaningful for the user - something like "Thanks but we've already received a reply from your e-mail address". Is there a way this can be changed - easily?
Thanks,
Tony Babb 

Answer 1

oops, sorry. I should also have mentioned that the web site is for an airshow (www.hollisterairshow.com) and the form is a planning form to help us gauge likely attendance and can be found here www.hollisterairshow.com/helpusplan.php
I'm using DW CS4 with a MySQL db.
The db is set up with the e-mail column defined as a Primary key and Unique, In DW I use the Insert Record behavior, here's the PHP code DW generates.
Thanks.
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
  if (PHP_VERSION < 6) {
    $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
  $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;   
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  return $theValue;
$editFormAction = $_SERVER['PHP_SELF'];
if (isset($_SERVER['QUERY_STRING'])) {
  $editFormAction .= "?" . htmlentities($_SERVER['QUERY_STRING']);
if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "form1")) {
  $insertSQL = sprintf("INSERT INTO plan (howArriving, howMany, Saturday, Sunday, camping, email, maillist, howHear) VALUES (%s, %s, %s, %s, %s, %s, %s, %s)",
                       GetSQLValueString($_POST['howarriving'], "text"),
                       GetSQLValueString($_POST['howMany'], "int"),
                       GetSQLValueString($_POST['whichdays'], "text"),
                       GetSQLValueString($_POST['whichdays'], "text"),
                       GetSQLValueString($_POST['RadioGroup1'], "text"),
                       GetSQLValueString($_POST['email'], "text"),
                       GetSQLValueString(isset($_POST['maillist']) ? "true" : "", "defined","'Y'","'N'"),
                       GetSQLValueString($_POST['howDidYouHear'], "text"));
  mysql_select_db($database_planconnection, $planconnection);
  $Result1 = mysql_query($insertSQL, $planconnection) or die(mysql_error());