TIA - code is below. Should I compare ALL email addresses in the table to see if there are duplicates? I am confusing myself... please help
$sql = "SELECT username, email_address FROM ".$table." WHERE username = '".$add_userName."' AND email_address = '".$add_emailAddress."'";
$users = mysql_query($sql);
$user = mysql_fetch_array($users);
if ( <what??> ) {
// do something
} else {
// do something else
}