php中的登陆login

Login

<?php
require "../include/DBClass.php";
$username=$_POST['UserName'];
$password=$_POST['Password'];
if(empty($username) || empty($password)){
  Go_Msg("请填写用户名，密码！","../default.html");
  exit;
 }
DBConn();
$password=md5($password);
$SQL = "Select UserName,UserType,UserPass From siteuser where UserName='" . $username ."' and UserPass='" . $password . "' and isopen=1";
//echo "$SQL";
$result = $db -> exec_SQL($SQL);
 $total=mysql_num_rows($result);
 if($total==0){
  DBClose();
  Go_Msg("注册用户还没有通过管理员审核或用户名及密码不符！请重新输入！","../default.html");
  exit;
 }else{
  $Rs = $db -> fetch_array($result);
  //附值，并登录
  session_register("username");
  session_register("usertype");
  $_SESSION["usertype"]=$Rs['UserType'];
  $_SESSION["username"]=$username;
  //echo $_SESSION["username"];
  if ($_SESSION["usertype"]==1){
    Go_Msg("登陆成功！","default.php"); 

    //header('Location:http://163.com');
  }
  if ($_SESSION["usertype"]==2){
     Go_Msg("登陆成功！","../user2/default_1.php");
  }
  if ($_SESSION["usertype"]==3){ 

     Go_Msg("登陆成功！","../user3/default_2.php");
  }
  // header('Location:default.php');
 }
DBClose();
// 何问起 hovertree.com
?>  

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