dl.php

十大精典PHP项目开发全程案例+代码

<?php
session_start();
$xym=trim($_POST[xym]);

class chkuser
{
   
   var $usernc;
   var $userpwd;
   var $xym;
   var $num;
  function chkuser($x,$y,$m)
   {
    $this->usernc=$x;
    $this->userpwd=$y;
	$this->xym=$m;
   }
   function chkinput()
   {
   
     if(strval($this->xym)!=$_SESSION["autonum1"])
      {
        echo "<script>alert('验证码输入错误!');history.go(-1);</script>";
        exit;
      }
   
     include_once("conn/conn.php");
	 $sql=mysql_query("select usernc from tb_user where usernc='".$this->usernc."'",$conn);
	 $info=mysql_fetch_array($sql);
	 if($info==false)
	  {
	    echo "<script>alert('对不起，不存在该用户!');history.back();</script>";
	    exit;
	  }
	  else
	  { 
	    $sql=mysql_query("select usernc from tb_user where usernc='".$this->usernc."' and pwd='".$this->userpwd."'",$conn);
	    $info=mysql_fetch_array($sql);
	    if($info==false)
		 {
		   echo "<script>alert('对不起，密码输入错误!');history.back();</script>";
		   exit;
		 }
		else
		 { 
		     //date_default_timezone_set("Asia/Hong_Kong");
             $lastlogintime=date("Y-m-j H:i:s");
             mysql_query("update tb_user set lastlogintime='".$lastlogintime."',logintimes=logintimes+1 where usernc='".$this->usernc."'",$conn); 
             if($_SESSION["unc"]!=""){
			  session_unregister("unc");
			 }   
          
             session_register("unc");
			 
             $_SESSION["unc"]=$this->usernc; 
		     echo "<script>alert('登录成功!');history.back();</script>";
		 } 
	   } 
       mysql_close($conn);   
   } 
 }
 $chk=new chkuser($_POST[usernc],md5($_POST[userpwd]),$xym);
 $chk->chkinput();
?>