設置思路
1、用戶注冊時需要提供一個E-MAIL郵箱，目的就是用該郵箱找回密碼。
2、當用戶忘記密碼或用戶名時，點擊登錄頁面的“找回密碼”超鏈接，打開表單，並輸入注冊用的E-MAIL郵箱，提交。
3、系統通過該郵箱，從數據庫中查找到該用戶信息，並更新該用戶的密碼為一個臨時密碼（比如：12345678）。
4、系統借助Jmail功能把該用戶的信息發送到該用戶的郵箱中（內容包括：用戶名、臨時密碼、提醒用戶及時修改臨時密碼的提示語）。
5、用戶用臨時密碼即可登錄。
HTML
我們在找回密碼的頁面上放置一個要求用戶輸入注冊時所用的郵箱，然後提交前台js來處理交互。
代碼如下 復制代碼
<p><strong>輸入您注冊的電子郵箱，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="提 交"></p>
jQuery
當用戶輸入完郵箱並點擊提交後，jQuery先驗證郵箱格式是否正確，如果正確則通過向後台sendmail.php發送Ajax請求，sendmail.php負責驗證郵箱是否存在和發送郵件，並會返回相應的處理結果給前台頁面，請看jQuery代碼：
代碼如下 復制代碼
$(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("該郵箱尚未注冊！");
$("#sub_btn").removeAttr("disabled").val('提 交').css("cursor","pointer");
}else{
$(".demo").html("<h3>"+msg+"</h3>");
}
});
}
});
})
以上使用的jQuery代碼很方便簡潔的完成了前端交互操作，如果您有一定的jQuery基礎，那上面的代碼一目了然，不多解釋。
當然別忘了在頁面中加載jQuery庫文件，有的同學經常問我說從www.111cn.net下載了demo怎麼用不了，那80%是jquery或者其他文件加載路徑錯了導致沒加載必要的文件。
PHP
sendmail.php需要驗證Email是否存在系統用戶表中，如果有，則讀取用戶信息，將用戶id、用戶名和密碼驚醒md5加密生成一個特別的字符串作為找回密碼的驗證碼，然後構造URL。同時我們為了控制URL鏈接的時效性，將記錄用戶提交找回密碼動作的操作時間，最後調用郵件發送類發送郵件到用戶郵箱，發送郵件類smtp.class.php已經打包好，請下載。
代碼如下 復制代碼
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){//該郵箱尚未注冊！
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);
//這裡面的一個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.111cn.net - 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，這個時候你的郵箱將會收到一封來自helloweba的密碼找回郵件，郵件內容中有一個URL鏈接，點擊該鏈接到www.111cn.net的reset.php來驗證郵箱。
代碼如下 復制代碼
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/>這裡只是演示，略過。';
}
}else{
$msg = '無效的鏈接';
}
}else{
$msg = '錯誤的鏈接！';
}
echo $msg;
reset.php首先接受參數email和token，然後根據email查詢數據表t_user中是否存在該Email，如果存在則獲取該用戶的信息，並且和sendmail.php中的token組合方式一樣構建token值，然後與url傳過來的token進行對比，如果當前時間與發送郵件時的時間相差超過24小時的，則提示“該鏈接已過期！”，反之，則說明鏈接有效，並且調轉到重置密碼頁面，最後就是用戶自己設置新密碼了。
小結：通過注冊郵箱驗證與本文郵件找回密碼，我們知道發送郵件在網站開發中的應用以及它的重要性，當然，現在也流行短信驗證應用，這個需要相關的短信接口對接就可以了。
最後，附上數據表t_user結構：
代碼如下 復制代碼
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類文件
代碼如下 復制代碼
<?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.111cn.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 . "
;";
}
}
}
?>
最後面有個數據庫連接類，這裡就不介紹了大大家可以百本站找相關的數據庫連接mysql類哦
from:http://www.111cn.net/phper/php/54606.htm
