每日总结6.4

<?php
//验证登陆信息
session_start();
include_once 'conn.php';
//if($_POST['submit']){
   $login=$_POST["login"];
   $username=$_POST['username'];
   $pwd=$_POST['pwd'];
   $cx=$_POST['cx'];
   $yzm=$_POST['yzm'];
   //$userpass=md5($userpass);
   if($login=="1")
   {
      if($yzm==$_SESSION['regsession_code'])
      {
      
      }
      else
      {
         echo "<script language='javascript'>alert('请输入正确验证码！');location.href='login.html';</script>";
         die;
      }
      if ($username!="" && $pwd!="" && $yzm!="")
      {
      if($cx=="管理员"){$sql="select * from allusers where username='$username' and pwd='$pwd'";}

      $query=mysql_query($sql);
      $rowscount=mysql_num_rows($query);
         if($rowscount>0)
         {
               $_SESSION['username']=$username;
               if($cx=="管理员"){
                  $_SESSION['cx']=mysql_result($query,0,"cx");
               }
               else
               {
                  $_SESSION['cx']=$cx;
               }
               //$row = mysql_fetch_row($query)
               //echo $_SESSION['cx'];
               echo "<script language='javascript'>alert('登陆成功！');location='main.php';</script>";
         }
         else
         {
               echo "<script language='javascript'>alert('用户名或密码错误！');history.back();</script>";
         }
      }
      else
      {
            echo "<script language='javascript'>alert('请输入完整！');history.back();</script>";
      }
   }
   
//}
?>