dedecms后台验证码总提示错误的解决方法

直接用下面的代码,覆盖dede中的login.php即可


代码如下:

<?
require_once(dirname(__FILE__)."/../include/config_base.php");
require_once(dirname(__FILE__)."/../include/inc_userlogin.php");
if(empty($dopost)) $dopost="";
//--------------------------------
//登录检测
//--------------------------------
if($dopost=="login")
{
  if(empty($validate)) $validate=="";
  else $validate = strtolower($validate);

if( empty($_SESSION["s_validate"]) ) $svali = "";
  else $svali = $_SESSION["s_validate"];

$cuserLogin = new userLogin();
     if(!empty($userid)&&!empty($pwd))
     {
              $res = $cuserLogin->checkUser($userid,$pwd);
              //成功登录
              if($res==1){
                       $cuserLogin->keepUser();
                       if(!empty($gotopage)){
                               //header("location:$gotopage");
                               ShowMsg("成功登录，正在转向管理管理主页！",$gotopage);
                               exit();
                       }
                       else{
                               ShowMsg("成功登录，正在转向管理管理主页！","index.php");
                               //header("location:index.php");
                               exit();
                       }
              }
              else if($res==-1){
                      ShowMsg("你的用户名不存在!","");
              }
              else{
                      ShowMsg("你的密码错误!","");
              }
     }//<-密码不为空
     else{
            ShowMsg("用户和密码没填写完整!","");
     }

//<-验证用户
}

?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>管理系统</title>
<link href="base.css" rel="stylesheet" type="text/css">
</head>
<body style='MARGIN: 0px' bgColor='#ffffff' leftMargin='0' topMargin='0' scroll='no'>
<table width="98%" border="0" align="center" cellpadding="0" cellspacing="0" bordercolor="#111111" style="BORDER-COLLAPSE: collapse">
  <tr> 
    <td width="100%" height="64" background="img/indextitlebg.gif"><img src="img/indextitle.gif" width="250" height="64"> 
    </td>
  </tr>
  <tr> 
    <td width="100%" height="20">　</td>
  </tr>
  <tr> 
    <td width="100%" height="20" valign="bottom">
        <table width="540" border="0" cellspacing="0" cellpadding="0">
        <tr> 
          <td align="right" style="FONT-SIZE: 2pt"> </td>
        </tr>
        <tr> 
          <td><IMG height=14 src="img/book1.gif" width=20>  用户登录</td>
        </tr>
      </table></td>
  </tr>
  <tr> 
    <td width="100%" height="1" background="img/sp_bg.gif"></td>
  </tr>
  <tr> 
    <td width="100%" height="2"></td>
  </tr>
  <tr> 
    <td width="100%" height="136" valign="top">
        <form name="form1" method="post" action="login.php">
        <input type="hidden" name="gotopage" value="<?if(!empty($gotopage)) echo $gotopage;?>">
        <input type="hidden" name="dopost" value="login">
        <table width="540" border="0" cellspacing="0" cellpadding="0">
          <tr> 
            <td colspan="2" height="4"></td>
          </tr>
          <tr> 
            <td width="156" height="30" align="center"> 用户名：</td>
            <td width="384"> <input type="text" name="userid" style="width:150;height:20"> 
            </td>
          </tr>
          <tr> 
            <td height="30" align="center"> 密　码： </td>
            <td> <input type="password" name="pwd" style="width:150;height:20"> 
            </td>
          </tr>

<tr> 
            <td height="50" colspan="2" align="center"> <input type="button" name="sm1" value="登录" style="background-color:#BAE171;border:1px solid #666666" onClick="this.form.submit();"> 
                <input type="button" name="sm2" value="Power by DedeCms" onClick="window.open('http://www.jb51.net');" style="background-color:#FFFFFF;border:1px solid #DDDDDD;color:#DDDDDD"> 
                </td>
          </tr>
        </table>
      </form></td>
  </tr>
  <tr> 
    <td width="100%" height="2" valign="top"></td>
  </tr>
</table>
</body>
</html>