php如何实现忘记密码找回的功能

php实现忘记密码找回功能的方法：1、用户注册时需要提供一个E-MAIL邮箱；2、打开表单并输入注册用的E-MAIL邮箱；3、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；4、借助Jmail功能实现修改密码即可。

本教程操作环境：windows10系统、php5.6，本文适用于所有品牌的电脑。

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PHP会员找回密码功能的简单实现

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>輸入您註冊的電子郵箱，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="http://www.bitscn.com/pdb/php/201609/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("請填寫正確的郵箱！");  }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("該郵箱尚未註冊！");  $("#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，发送邮件类smtp.class.php已经打包好，请下载。

代码如下

include_once("connect.php");//連接數據庫   $email = stripslashes(trim($_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){//該郵箱尚未註冊！  echo 'noreg';  exit;  }else{  $row = mysql_fetch_array($query);  $getpasstime = time();  $uid = $row['id'];  $token = md5($uid.$row['username'].$row['password']);//組合驗證碼  $url = "/demo/resetpass/reset.php?email=".$email."  &token=".$token;//構造URL  $time = date('Y-m-d H:i');  $result = sendmail($time,$email,$url);  if($result==1){//郵件發送成功  $msg = '系統已向您的郵箱發送了一封郵件<br/>請登錄到您的郵箱及時重置您的密碼！';  //更新數據發送時間  mysql_query("update `t_user` set `getpasstime`='$getpasstime' where id='$uid '");  }else{  $msg = $result;  }  echo $msg;  }   //發送郵件  function sendmail($time,$email,$url){  include_once("smtp.class.php");  $smtpserver = ""; //SMTP服務器，如smtp.163.com  $smtpserverport = 25; //SMTP服務器端口  $smtpusermail = ""; //SMTP服務器的用戶郵箱  $smtpuser = ""; //SMTP服務器的用戶帳號  $smtppass = ""; //SMTP服務器的用戶密碼  $smtp = new Smtp($smtpserver, $smtpserverport, true, $smtpuser, $smtppass);  //這裏面的一個true是表示使用身份驗證,否則不使用身份驗證.  $emailtype = "HTML"; //信件類型，文本:text；網頁：HTML  $smtpemailto = $email;  $smtpemailfrom = $smtpusermail;  $emailsubject = "www.bitsCN.com - 找回密碼";  $emailbody = "親愛的".$email."：<br/>您在".$time."提交了找回密碼請求。請點擊下面的鏈接重置密碼  （按鈕24小時內有效）。<br/><a href='".$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");//連接數據庫   $token = stripslashes(trim($_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 = '請重新設置密碼，顯示重置密碼表單，<br/>這裏只是演示，略過。';  }  }else{  $msg = '無效的鏈接';  }  }else{  $msg = '錯誤的鏈接！';  }  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.bitsCN.com): $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 . " ;"; } } } ?>

最后面有个数据库连接类，这里就不介绍了大家可以百本站找相关的数据库连接mysql类哦

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