Question : check if email aleady exists in db table before new record is inserted

I need to check if an email address already exists before a new record is inserted - can i modify the following code to do that?

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$editFormAction = $_SERVER['PHP_SELF'];
if (isset($_SERVER['QUERY_STRING'])) {
  $editFormAction .= "?" . htmlentities($_SERVER['QUERY_STRING']);
}

if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "signup")) {
  $insertSQL = sprintf("INSERT INTO members (membername, email, password) VALUES (%s, %s, %s)",
                       GetSQLValueString($_POST['member_name'], "text"),
                       GetSQLValueString($_POST['email'], "text"),
                       GetSQLValueString($_POST['password'], "text"));

  mysql_select_db($database_stella, $stella);
  $Result1 = mysql_query($insertSQL, $stella) or die(mysql_error());
}

Answer : check if email aleady exists in db table before new record is inserted

well, if you're still at it... one of these generic keycodes will work. they're provided by microsoft for situations like this. they wont activate, but they'll get you installed so you can change the key later

from here:
http://technet.microsoft.com/en-us/library/bb457096.aspx

Generic Product Keys

Applicability Product Key Sequence Number

Whistler Tech Beta Program PXRQ3-7VPMV-CQWXR-8Y4KX-RD786 010053298
(All Platforms)

Windows XP JKTVX-HCRXC-J2YC9-MX3K4-G9X26 005037750
Home Edition
Full product

Windows XP C84VB-JYVFD-P7HF4-6KKRJ-7M6XH 010000182
Home Edition
Upgrade

Windows XP Professional DR8GV-C8V6J-BYXHG-7PYJR-DB66Y 005072760
Full product

Windows XP Professional FKTW8-Q7MJ7-JK6GW-9J9RV-HC3C2 010000212
Upgrade

Windows XP KGVXT-F9HVW-XGW9X-QVYVX-HQ9RD 120000613
Home Edition
System Builder (Full)

Windows XP Professional TTGHK-3RC33-BT9DR-3BVYV-BTQ98 120000607
System Builder (Full)

if you found this useful, i would appreciate the points