<p><strong>輸入您注冊(cè)的電子郵箱，找回密碼：</strong></p> 
<p><input type="text" class="input" name="email" id="email"><span id="chkmsg"></span></p> 
<p><input type="button" class="btn" id="sub_btn" value="提 交"></p> 

 
$(function(){ 
  $("#sub_btn").click(function(){ 
    var email = $("#email").val(); 
    var preg = /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/; //匹配Email 
    if(email=='' || !preg.test(email)){ 
      $("#chkmsg").html("請(qǐng)?zhí)顚懻_的郵箱！"); 
    }else{ 
      $("#sub_btn").attr("disabled","disabled").val('提交中..').css("cursor","default"); 
      $.post("sendmail.php",{mail:email},function(msg){ 
        if(msg=="noreg"){ 
          $("#chkmsg").html("該郵箱尚未注冊(cè)！"); 
          $("#sub_btn").removeAttr("disabled").val('提 交').css("cursor","pointer"); 
        }else{ 
          $(".demo").html("<h3>"+msg+"</h3>"); 
        } 
      }); 
    } 
  }); 
}) 

 
include_once("connect.php");//連接數(shù)據(jù)庫 
 
$email = stripslashes(trim($_POST['mail'])); 
   
$sql = "select id,username,password from `t_user` where `email`='$email'"; 
$query = mysql_query($sql); 
$num = mysql_num_rows($query); 
if($num==0){//該郵箱尚未注冊(cè)！ 
  echo 'noreg'; 
  exit;   
}else{ 
  $row = mysql_fetch_array($query); 
  $getpasstime = time(); 
  $uid = $row['id']; 
  $token = md5($uid.$row['username'].$row['password']);//組合驗(yàn)證碼 
  $url = "http://www.dhdzp.com/demo/resetpass/reset.php?email=".$email." 
&token=".$token;//構(gòu)造URL 
  $time = date('Y-m-d H:i'); 
  $result = sendmail($time,$email,$url); 
  if($result==1){//郵件發(fā)送成功 
    $msg = '系統(tǒng)已向您的郵箱發(fā)送了一封郵件<br/>請(qǐng)登錄到您的郵箱及時(shí)重置您的密碼！'; 
    //更新數(shù)據(jù)發(fā)送時(shí)間 
    mysql_query("update `t_user` set `getpasstime`='$getpasstime' where id='$uid '"); 
  }else{ 
    $msg = $result; 
  } 
  echo $msg; 
} 
 
//發(fā)送郵件 
function sendmail($time,$email,$url){ 
  include_once("smtp.class.php"); 
  $smtpserver = ""; //SMTP服務(wù)器，如smtp.163.com 
  $smtpserverport = 25; //SMTP服務(wù)器端口 
  $smtpusermail = ""; //SMTP服務(wù)器的用戶郵箱 
  $smtpuser = ""; //SMTP服務(wù)器的用戶帳號(hào) 
  $smtppass = ""; //SMTP服務(wù)器的用戶密碼 
  $smtp = new Smtp($smtpserver, $smtpserverport, true, $smtpuser, $smtppass); 
  //這里面的一個(gè)true是表示使用身份驗(yàn)證,否則不使用身份驗(yàn)證. 
  $emailtype = "HTML"; //信件類型，文本:text；網(wǎng)頁：HTML 
  $smtpemailto = $email; 
  $smtpemailfrom = $smtpusermail; 
  $emailsubject = "jb51.net - 找回密碼"; 
  $emailbody = "親愛的".$email."：<br/>您在".$time."提交了找回密碼請(qǐng)求。請(qǐng)點(diǎn)擊下面的鏈接重置密碼 
（按鈕24小時(shí)內(nèi)有效）。<br/><a href='".$url."'target='_blank'>".$url."</a>"; 
  $rs = $smtp->sendmail($smtpemailto, $smtpemailfrom, $emailsubject, $emailbody, $emailtype); 
 
  return $rs; 
} 

 
include_once("connect.php");//連接數(shù)據(jù)庫 
 
$token = stripslashes(trim($_GET['token'])); 
$email = stripslashes(trim($_GET['email'])); 
$sql = "select * from `t_user` where email='$email'"; 
 
$query = mysql_query($sql); 
$row = mysql_fetch_array($query); 
if($row){ 
  $mt = md5($row['id'].$row['username'].$row['password']); 
  if($mt==$token){ 
    if(time()-$row['getpasstime']>24*60*60){ 
      $msg = '該鏈接已過期！'; 
    }else{ 
      //重置密碼... 
      $msg = '請(qǐng)重新設(shè)置密碼，顯示重置密碼表單，<br/>這里只是演示，略過。'; 
    } 
  }else{ 
    $msg = '無效的鏈接'; 
  } 
}else{ 
  $msg = '錯(cuò)誤的鏈接！';   
} 
echo $msg; 

 
CREATE TABLE `t_user` ( 
 `id` int(11) NOT NULL auto_increment, 
 `username` varchar(30) NOT NULL, 
 `password` varchar(32) NOT NULL, 
 `email` varchar(50) NOT NULL, 
 `getpasstime` int(10) NOT NULL, 
 PRIMARY KEY (`id`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8;