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。
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
輸入您註冊的電子郵箱，找回密碼：
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==&＃39;&＃39; || !preg.test(email)){ $("#chkmsg").html("請填寫正確的郵箱！"); }else{ $("#sub_btn").attr("disabled","disabled").val(&＃39;提交中..&＃39;).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(&＃39;提 交&＃39;).css("cursor","pointer"); }else{ $(".demo").html(""+msg+"
"); } }); } }); })
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[&＃39;mail&＃39;])); $sql = "select id,username,password from `t_user` where `email`=&＃39;$email&＃39;"; $query = mysql_query($sql); $num = mysql_num_rows($query); if($num==0){//該郵箱尚未註冊！ echo &＃39;noreg&＃39;; exit; }else{ $row = mysql_fetch_array($query); $getpasstime = time(); $uid = $row[&＃39;id&＃39;]; $token = md5($uid.$row[&＃39;username&＃39;].$row[&＃39;password&＃39;]);//組合驗證碼 $url = "/demo/resetpass/reset.php?email=".$email." &token=".$token;//構造URL $time = date(&＃39;Y-m-d H:i&＃39;); $result = sendmail($time,$email,$url); if($result==1){//郵件發送成功 $msg = &＃39;系統已向您的郵箱發送了一封郵件
請登錄到您的郵箱及時重置您的密碼！&＃39;; //更新數據發送時間 mysql_query("update `t_user` set `getpasstime`=&＃39;$getpasstime&＃39; where id=&＃39;$uid &＃39;"); }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."：
您在".$time."提交了找回密碼請求。請點擊下面的鏈接重置密碼 （按鈕24小時內有效）。
".$url.""; $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[&＃39;token&＃39;])); $email = stripslashes(trim($_GET[&＃39;email&＃39;])); $sql = "select * from `t_user` where email=&＃39;$email&＃39;"; $query = mysql_query($sql); $row = mysql_fetch_array($query); if($row){ $mt = md5($row[&＃39;id&＃39;].$row[&＃39;username&＃39;].$row[&＃39;password&＃39;]); if($mt==$token){ if(time()-$row[&＃39;getpasstime&＃39;]>24*60*60){ $msg = &＃39;該鏈接已過期！&＃39;; }else{ //重置密碼... $msg = &＃39;請重新設置密碼，顯示重置密碼表單，
這裏只是演示，略過。&＃39;; } }else{ $msg = &＃39;無效的鏈接&＃39;; } }else{ $msg = &＃39;錯誤的鏈接！&＃39;; } 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
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 $this->smtp_error("sending
.
[EOM]"); } if (!$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
以上就是php如何实现忘记密码找回的功能的详细内容，
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