PHP会员找回密码功能的简单实现

输入您注册的电子邮箱，找回密码：

"+msg+""); } }); } }); })

$email = stripslashes(trim($_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
$msg = '系统已向您的邮箱发送了一封邮件
请登录到您的邮箱及时重置您的密码！';
//更新数据发送时间
mysql_query("update t_user set getpasstime='$getpasstime' where id='$uid '");
}else{
$msg = $result;
}
echo $msg;
}

//发送邮件
function sendmail($time,$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.52php.cn - 找回密码";
$emailbody = "亲爱的".$email."：
您在".$time."提交了找回密码请求。请点击下面的链接重置密码
（按钮24小时内有效）。
".$url."";
$rs = $smtp->sendmail($smtpemailto,$smtpemailfrom,$emailsubject,$emailbody,$emailtype);

return $rs;
}

$token = stripslashes(trim($_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']>246060){
$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，
这里只是演示，略过。';
}
}else{
$msg = '无效的链接';
}
}else{
$msg = '错误的链接！';
}
echo $msg;

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.52php.cn): $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,$this->strip_comment($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($helo,$to,$body = "") {
if (!$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->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);

$address = ereg_replace("^.<(.+)>.$",$address);

return $address;
}

function smtp_debug($message) {
if ($this->debug) {
echo $message . "
;";
}
}
}
?>