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，发送邮件类smtp.class.php已经打包好，请下载。
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 . "
;";
}
}
}
?>
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，也希望大家多多支持硕编程。
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