PHP会员找回密码功能实现实例介绍 -php手册-php.cn

如果你做的网站有会员系统那必须就自动找回密码功能了，也就是忘记密码功能，如果用户忘记了密码可以通过邮箱或手机号直接找回密码，下面我来介绍邮箱找回密码方法。

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。

输入您注册的电子邮箱，找回密码：

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：

$(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("请填写正确的邮箱！"); 
        }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("该邮箱尚未注册！"); 
                    $("#sub_btn").removeAttr("disabled").val(&#39;提 交&#39;).css("cursor","pointer"); 
                }else{ 
                    $(".demo").html("<h3>"+msg+"</h3>"); 
                } 
            }); 
        } 
    }); 
})

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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www.phprm.com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。

<?php
include_once ("connect.php"); //连接数据库
$email = stripslashes(trim($_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) { //该邮箱尚未注册！
    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;]); //组合验证码
    $url = "/demo/resetpass/reset.php?email=" . $email . " 
&token=" . $token; //构造URL
    $time = date(&#39;Y-m-d H:i&#39;);
    $result = sendmail($time, $email, $url);
    if ($result == 1) { //邮件发送成功
        $msg = &#39;系统已向您的邮箱发送了一封邮件<br/>请登录到您的邮箱及时重置您的密码！&#39;;
        //更新数据发送时间
        mysql_query("update `t_user` set `getpasstime`=&#39;$getpasstime&#39; where id=&#39;$uid &#39;");
    } 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.phprm.com - 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=&#39;" . $url . "&#39;target=&#39;_blank&#39;>" . $url . "</a>";
    $rs = $smtp->sendmail($smtpemailto, $smtpemailfrom, $emailsubject, $emailbody, $emailtype);
    return $rs;
}
?>

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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www.phprm.com的reset.php来验证邮箱。

include_once("connect.php");//连接数据库 
 
$token = stripslashes(trim($_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;该链接已过期！&#39;; 
        }else{ 
            //重置密码... 
            $msg = &#39;请重新设置密码，显示重置密码表单，<br/>这里只是演示，略过。&#39;; 
        } 
    }else{ 
        $msg =  &#39;无效的链接&#39;; 
    } 
}else{ 
    $msg =  &#39;错误的链接！&#39;;     
} 
echo $msg;

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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：

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;

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smtp.class.php类文件

<?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: " . $to . "\r\n";
        if ($cc != "") {
            $header.= "Cc: " . $cc . "\r\n";
        }
        $header.= "From: $from<" . $from . ">rn";
        $header.= "Subject: " . $subject . "\r\n";
        $header.= $additional_headers;
        $header.= "Date: " . date("r") . "\r\n";
        $header.= "X-Mailer:By Redhat (PHP/" . phpversion() . ")rn";
        list($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 . "\r\n" . $body);
        $this->smtp_debug("> " . str_replace("\r\n", "\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() {
        $response = str_replace("\r\n", "", fgets($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 . "\r\n");
        $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 . "
   ;";
        }
    }
}
?>

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

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随意转载^^但请附上教程地址。