PHP会员找回密码功能的简单实现

文章来自：博客

http://www.jb51.net/article/91944.htm

设置思路

1、用户注册时需要提供一个E-MAIL邮箱，目的就是用该邮箱找回密码。

2、当用户忘记密码或用户名时，点击登录页面的“找回密码”超链接，打开表单，并输入注册用的E-MAIL邮箱，提交。

3、系统通过该邮箱，从数据库中查找到该用户信息，并更新该用户的密码为一个临时密码（比如：12345678）。

4、系统借助Jmail功能把该用户的信息发送到该用户的邮箱中（内容包括：用户名、临时密码、提醒用户及时修改临时密码的提示语）。

5、用户用临时密码即可登录。

HTML

我们在找回密码的页面上放置一个要求用户输入注册时所用的邮箱，然后提交前台js来处理交互。

代码如下

 <p><strong>输入您注册的电子邮箱，找回密码：</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>

jQuery

当用户输入完邮箱并点击提交后，jQuery先验证邮箱格式是否正确，如果正确则通过向后台sendmail.php发送Ajax请求，sendmail.php负责验证邮箱是否存在和发送邮件，并会返回相应的处理结果给前台页面，请看jQuery代码：

代码如下

 $(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("请填写正确的邮箱！");
 }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("该邮箱尚未注册！");
 $("#sub_btn").removeAttr("disabled").val('提 交').css("cursor","pointer");
 }else{
 $(".demo").html("<h3>"+msg+"</h3>");
 }
 });
 }
 });
 })

以上使用的jQuery代码很方便简洁的完成了前端交互操作，如果您有一定的jQuery基础，那上面的代码一目了然，不多解释。

当然别忘了在页面中加载jQuery库文件，有的同学经常问我说从网上下载了demo怎么用不了，那80%是jquery或者其他文件加载路径错了导致没加载必要的文件。

PHP

sendmail.php需要验证Email是否存在系统用户表中，如果有，则读取用户信息，将用户id、用户名和密码惊醒md5加密生成一个特别的字符串作为找回密码的验证码，然后构造URL。同时我们为了控制URL链接的时效性，将记录用户提交找回密码动作的操作时间，最后调用邮件发送类发送邮件到用户邮箱

代码如下

 include_once("connect.php");//连接数据库 

 $email = stripslashes(trim($_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){//该邮箱尚未注册！
 echo 'noreg';
 exit;
 }else{
 $row = mysql_fetch_array($query);
 $getpasstime = time();
 $uid = $row['id'];
 $token = md5($uid.$row['username'].$row['password']);//组合验证码
 $url = "/demo/resetpass/reset.php?email=".$email."
 &token=".$token;//构造URL
 $time = date('Y-m-d H:i');
 $result = sendmail($time,$email,$url);
 if($result==1){//邮件发送成功
 $msg = '系统已向您的邮箱发送了一封邮件<br/>请登录到您的邮箱及时重置您的密码！';
 //更新数据发送时间
 mysql_query("update `t_user` set `getpasstime`='$getpasstime' where id='$uid '");
 }else{
 $msg = $result;
 }
 echo $msg;
 } 

 //发送邮件
 function sendmail($time,$email,$url){
 include_once("smtp.class.php");
 $smtpserver = ""; //SMTP服务器，如smtp.163.com
 $smtpserverport = 25; //SMTP服务器端口
 $smtpusermail = ""; //SMTP服务器的用户邮箱
 $smtpuser = ""; //SMTP服务器的用户帐号
 $smtppass = ""; //SMTP服务器的用户密码
 $smtp = new Smtp($smtpserver, $smtpserverport, true, $smtpuser, $smtppass);
 //这里面的一个true是表示使用身份验证,否则不使用身份验证.
 $emailtype = "HTML"; //信件类型，文本:text；网页：HTML
 $smtpemailto = $email;
 $smtpemailfrom = $smtpusermail;
 $emailsubject = "www.jb51.net - 找回密码";
 $emailbody = "亲爱的".$email."：<br/>您在".$time."提交了找回密码请求。请点击下面的链接重置密码
 （按钮24小时内有效）。<br/><a href='".$url."'target='_blank'>".$url."</a>";
 $rs = $smtp->sendmail($smtpemailto, $smtpemailfrom, $emailsubject, $emailbody, $emailtype); 

 return $rs;
 }

好了，这个时候你的邮箱将会收到一封来自helloweba的密码找回邮件，邮件内容中有一个URL链接，点击该链接到reset.php来验证邮箱。

 

代码如下

 include_once("connect.php");//连接数据库 

 $token = stripslashes(trim($_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 = '该链接已过期！';
 }else{
 //重置密码...
 $msg = '请重新设置密码，显示重置密码表单，<br/>这里只是演示，略过。';
 }
 }else{
 $msg = '无效的链接';
 }
 }else{
 $msg = '错误的链接！';
 }
 echo $msg;

reset.php首先接受参数email和token，然后根据email查询数据表t_user中是否存在该Email，如果存在则获取该用户的信息，并且和sendmail.php中的token组合方式一样构建token值，然后与url传过来的token进行对比，如果当前时间与发送邮件时的时间相差超过24小时的，则提示“该链接已过期！”，反之，则说明链接有效，并且调转到重置密码页面，最后就是用户自己设置新密码了。

小结：通过注册邮箱验证与本文邮件找回密码，我们知道发送邮件在网站开发中的应用以及它的重要性，当然，现在也流行短信验证应用，这个需要相关的短信接口对接就可以了。

最后，附上数据表t_user结构：

代码如下

 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;

smtp.class.php类文件

代码如下

 <?php

 class Smtp{

 /* Public Variables */

 var $smtp_port;

 var $time_out;

 var $host_name;

 var $log_file;

 var $relay_host;

 var $debug;

 var $auth;

 var $user;

 var $pass;

 /* Private Variables */
 var $sock;

 /* Constractor */

 function smtp($relay_host = "", $smtp_port = 25, $auth = false, $user, $pass) {
 $this->debug = false;

 $this->smtp_port = $smtp_port;

 $this->relay_host = $relay_host;

 $this->time_out = 30; //is used in fsockopen()

 $this->auth = $auth; //auth

 $this->user = $user;

 $this->pass = $pass;

 $this->host_name = "localhost"; //is used in HELO command
 $this->log_file = "";

 $this->sock = false;
 }

 /* Main Function */

 function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "") {
 $mail_from = $this->get_address($this->strip_comment($from));

 $body = ereg_replace("(^|(rn))(.)", "1.3", $body);

 $header .= "MIME-Version:1.0rn";

 if ($mailtype == "HTML") {
 $header .= "Content-Type:text/htmlrn";
 }

 $header .= "To: " . $to . "rn";

 if ($cc != "") {
 $header .= "Cc: " . $cc . "rn";
 }

 $header .= "From(www.jb51.net): $from<" . $from . ">rn";

 $header .= "Subject: " . $subject . "rn";

 $header .= $additional_headers;

 $header .= "Date: " . date("r") . "rn";

 $header .= "X-Mailer:By Redhat (PHP/" . phpversion() . ")rn";

 list ($msec, $sec) = explode(" ", microtime());

 $header .= "Message-ID: <" . date("YmdHis", $sec) . "." . ($msec * 1000000) . "." . $mail_from . ">rn";

 $TO = explode(",", $this->strip_comment($to));

 if ($cc != "") {
 $TO = array_merge($TO, explode(",", $this->strip_comment($cc)));
 }

 if ($bcc != "") {
 $TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));
 }

 $sent = true;

 foreach ($TO as $rcpt_to) {
 $rcpt_to = $this->get_address($rcpt_to);

 if (!$this->smtp_sockopen($rcpt_to)) {
 $this->log_write("Error: Cannot send email to " . $rcpt_to . "n");

 $sent = false;

 continue;
 }

 if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) {
 $this->log_write("E-mail has been sent to <" . $rcpt_to . ">n");
 } else {
 $this->log_write("Error: Cannot send email to <" . $rcpt_to . ">n");

 $sent = false;
 }

 fclose($this->sock);

 $this->log_write("Disconnected from remote hostn");
 }

 return $sent;
 }

 /* Private Functions */

 function smtp_send($helo, $from, $to, $header, $body = "") {
 if (!$this->smtp_putcmd("HELO", $helo)) {
 return $this->smtp_error("sending HELO command");
 }
 // auth
 if ($this->auth) {
 if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) {
 return $this->smtp_error("sending HELO command");
 }

 if (!$this->smtp_putcmd("", base64_encode($this->pass))) {
 return $this->smtp_error("sending HELO command");
 }
 }

 if (!$this->smtp_putcmd("MAIL", "FROM:<" . $from . ">")) {
 return $this->smtp_error("sending MAIL FROM command");
 }

 if (!$this->smtp_putcmd("RCPT", "TO:<" . $to . ">")) {
 return $this->smtp_error("sending RCPT TO command");
 }

 if (!$this->smtp_putcmd("DATA")) {
 return $this->smtp_error("sending DATA command");
 }

 if (!$this->smtp_message($header, $body)) {
 return $this->smtp_error("sending message");
 }

 if (!$this->smtp_eom()) {
 return $this->smtp_error("sending <CR><LF>.<CR><LF> [EOM]");
 }

 if (!$this->smtp_putcmd("QUIT")) {
 return $this->smtp_error("sending QUIT command");
 }

 return true;
 }

 function smtp_sockopen($address) {
 if ($this->relay_host == "") {
 return $this->smtp_sockopen_mx($address);
 } else {
 return $this->smtp_sockopen_relay();
 }
 }

 function smtp_sockopen_relay() {
 $this->log_write("Trying to " . $this->relay_host . ":" . $this->smtp_port . "n");

 $this->sock = @ fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);

 if (!($this->sock && $this->smtp_ok())) {
 $this->log_write("Error: Cannot connenct to relay host " . $this->relay_host . "n");

 $this->log_write("Error: " . $errstr . " (" . $errno . ")n");

 return false;
 }

 $this->log_write("Connected to relay host " . $this->relay_host . "n");

 return true;
 ;
 }

 function smtp_sockopen_mx($address) {
 $domain = ereg_replace("^.+@([^@]+)$", "1", $address);

 if (!@ getmxrr($domain, $MXHOSTS)) {
 $this->log_write("Error: Cannot resolve MX "" . $domain . ""n");

 return false;
 }

 foreach ($MXHOSTS as $host) {
 $this->log_write("Trying to " . $host . ":" . $this->smtp_port . "n");

 $this->sock = @ fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);

 if (!($this->sock && $this->smtp_ok())) {
 $this->log_write("Warning: Cannot connect to mx host " . $host . "n");

 $this->log_write("Error: " . $errstr . " (" . $errno . ")n");

 continue;
 }

 $this->log_write("Connected to mx host " . $host . "n");

 return true;
 }

 $this->log_write("Error: Cannot connect to any mx hosts (" . implode(", ", $MXHOSTS) . ")n");

 return false;
 }

 function smtp_message($header, $body) {
 fputs($this->sock, $header . "rn" . $body);

 $this->smtp_debug("> " . str_replace("rn", "n" . "> ", $header . "n> " . $body . "n> "));

 return true;
 }

 function smtp_eom() {
 fputs($this->sock, "rn.rn");

 $this->smtp_debug(". [EOM]n");

 return $this->smtp_ok();
 }

 function smtp_ok() {
 $response = str_replace("rn", "", fgets($this->sock, 512));

 $this->smtp_debug($response . "n");

 if (!ereg("^[23]", $response)) {
 fputs($this->sock, "QUITrn");

 fgets($this->sock, 512);

 $this->log_write("Error: Remote host returned "" . $response . ""n");

 return false;
 }

 return true;
 }

 function smtp_putcmd($cmd, $arg = "") {
 if ($arg != "") {
 if ($cmd == "")
 $cmd = $arg;

 else
 $cmd = $cmd . " " . $arg;
 }

 fputs($this->sock, $cmd . "rn");

 $this->smtp_debug("> " . $cmd . "n");

 return $this->smtp_ok();
 }

 function smtp_error($string) {
 $this->log_write("Error: Error occurred while " . $string . ".n");

 return false;
 }

 function log_write($message) {
 $this->smtp_debug($message);

 if ($this->log_file == "") {
 return true;
 }

 $message = date("M d H:i:s ") . get_current_user() . "[" . getmypid() . "]: " . $message;

 if (!@ file_exists($this->log_file) || !($fp = @ fopen($this->log_file, "a"))) {
 $this->smtp_debug("Warning: Cannot open log file "" . $this->log_file . ""n");

 return false;
 ;
 }

 flock($fp, LOCK_EX);

 fputs($fp, $message);

 fclose($fp);

 return true;
 }

 function strip_comment($address) {
 $comment = "([^()]*)";

 while (ereg($comment, $address)) {
 $address = ereg_replace($comment, "", $address);
 }

 return $address;
 }

 function get_address($address) {
 $address = ereg_replace("([ trn])+", "", $address);

 $address = ereg_replace("^.*<(.+)>.*$", "1", $address);

 return $address;
 }

 function smtp_debug($message) {
 if ($this->debug) {
 echo $message . "
 ;";
 }
 }
 }
 ?>

以上这篇PHP会员找回密码功能的简单实现就是小编分享给大家的全部内容了，希望能给大家一个参考