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PHP會員找回密碼功能實現實例介紹

編輯：關於PHP編程

如果你做的網站有會員系統那必須就自動找回密碼功能了，也就是忘記密碼功能，如果用戶忘記了密碼可以通過郵箱或手機號直接找回密碼，下面我來介紹郵箱找回密碼方法。

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.bKjia.c0m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.bKjia.c0m - 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.bKjia.c0m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: $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 . "
   ;";
  }
}
}
?>