SESSION.PHP
else{
            if($database->updateRandomUser($subuser, $subpass, $subemail)){
                $mailer->sendWelcomeRandom($subuser,$subemail,$subpass);
                return 0;
            }
            elseif($database->addNewUser($subuser, $subpass, $subemail)){
                if(EMAIL_WELCOME){
                   $mailer->sendWelcome($subuser,$subemail,$subpass);
                }
                return 0; //New user added succesfully
            }
            else{
                return 2;  //Registration attempt failed
            }
        }




DATABASE.PHP

   function updateRandomUser($username, $password, $email) {
         if(!get_magic_quotes_gpc()){
         $username = addslashes($username);
      }
      // Edit if random = ok //
      $random = $_SESSION['random'];
      $sql = "UPDATE users SET username = '$username', password = '$password', userlevel = 1, email = '$email', active = 1 WHERE random = '$random'";
    return (mysql_query($sql, $this->connection));
    }

   /**
    * addNewUser - Inserts the given (username, password, email)
    * info into the database. Appropriate user level is set.
    * Returns true on success, false otherwise.
    */
   function addNewUser($username, $password, $email){
      $time = time();
      /* If admin sign up, give admin user level */
      if(strcasecmp($username, ADMIN_NAME) == 0){
         $ulevel = ADMIN_LEVEL;
      }else{
         $ulevel = USER_LEVEL;
      }
      $q = "INSERT INTO ".TBL_USERS." VALUES ('', '$username', '$password', '0', $ulevel, '$email', $time, '1')";
      return mysql_query($q, $this->connection);
   }