有个变量看不懂是什么意思

<?php require_once('../Connections/conn_vote.php'); ?>
<?php
// *** Start the session
session_start();
// *** Validate request to log in to this site.
$FF_LoginAction = $HTTP_SERVER_VARS['PHP_SELF'];
if (isset($HTTP_SERVER_VARS['QUERY_STRING']) && $HTTP_SERVER_VARS['QUERY_STRING']!="") $FF_LoginAction .= "?".$HTTP_SERVER_VARS['QUERY_STRING'];
if (isset($HTTP_POST_VARS['username'])) {
  $FF_valUsername=$HTTP_POST_VARS['username'];
  $FF_valPassword=$HTTP_POST_VARS['password'];
  $FF_fldUserAuthorization="";
  $FF_redirectLoginSuccess="admin.php";
  $FF_redirectLoginFailed="login.php";
  $FF_rsUser_Source="SELECT username, password ";
  if ($FF_fldUserAuthorization != "") $FF_rsUser_Source .= "," . $FF_fldUserAuthorization;
  $FF_rsUser_Source .= " FROM admin WHERE username='" . $FF_valUsername . "' AND password='" . $FF_valPassword . "'";
  mysql_select_db($database_conn_vote, $conn_vote);
  $FF_rsUser=mysql_query($FF_rsUser_Source, $conn_vote) or die(mysql_error());
  $row_FF_rsUser = mysql_fetch_assoc($FF_rsUser);
  if(mysql_num_rows($FF_rsUser) > 0) {
    // username and password match - this is a valid user
    $MM_Username=$FF_valUsername;
    session_register("MM_Username");
    if ($FF_fldUserAuthorization != "") {
      $MM_UserAuthorization=$row_FF_rsUser[$FF_fldUserAuthorization];
    } else {
      $MM_UserAuthorization="";
    }
    session_register("MM_UserAuthorization");
    if (isset($accessdenied) && false) {
      $FF_redirectLoginSuccess = $accessdenied;
    }
    mysql_free_result($FF_rsUser);
    session_register("FF_login_failed");
        $FF_login_failed = false;
    header ("Location: $FF_redirectLoginSuccess");
    exit;
  }
  mysql_free_result($FF_rsUser);
  session_register("FF_login_failed");
  $FF_login_failed = true;
  header ("Location: $FF_redirectLoginFailed");
  exit;
}

?>


里面的$FF_fldUserAuthorization变量有什么作用？
还有我的数据库根本没有$row_FF_rsUser[$FF_fldUserAuthorization];里的$FF_fldUserAuthorization字段、

貌似是dw生成的代码。的确很冗余。建议自己写写。

鱼大哥~  那个变量时不是多余了