PHP simple method to implement member password retrieval function

<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>

$(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>");

}

});

}

});

})

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 = &#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`='$getpasstime' where id='$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=&#39;".$url."&#39;target=&#39;_blank&#39;>".$url."</a>";

$rs = $smtp->sendmail($smtpemailto, $smtpemailfrom, $emailsubject, $emailbody, $emailtype);

return $rs;

}

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 = &#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 = '无效的链接';

}

}else{

$msg = '错误的链接！';

}

echo $msg;

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;

<?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 . "

;";

}

}

}

?>