php如何實現忘記密碼找回的功能

php實作忘記密碼找回功能的方法：1、使用者註冊時需提供一個E-MAIL信箱；2、開啟表單並輸入註冊用的E-MAIL信箱；3、從資料庫查找到該用戶訊息，並更新該用戶的密碼為一個臨時密碼；4、借助Jmail功能實現修改密碼即可。

本教學操作環境：windows10系統、php5.6，本文適用於所有品牌的電腦。

推薦：《PHP影片教學》

PHP會員找回密碼功能的簡單實作

##設定想法

1、用戶註冊時需要提供一個E-MAIL郵箱，目的就是用該郵箱找回密碼。

2、當使用者忘記密碼或使用者名稱時，點擊登入頁面的「找回密碼」超鏈接，打開表單，並輸入註冊用的E-MAIL郵箱，提交。

3、系統透過該郵箱，從資料庫中查找到該使用者信息，並更新該使用者的密碼為一個臨時密碼（例如：12345678）。

4、系統藉助Jmail功能把該使用者的資料傳送到該使用者的信箱（內容包括：使用者名稱、臨時密碼、提醒使用者及時修改臨時密碼的提示語）。

5、使用者用臨時密碼即可登入。

HTML

我們在找回密碼的頁面上放置一個要求使用者輸入註冊時所使用的郵箱，然後提交前台js來處理互動。

程式碼如下

<p><strong>輸入您註冊的電子郵箱，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="http://www.bitscn.com/pdb/php/201609/提 交"></p>

jQuery

當使用者輸入完信箱並點選提交後，jQuery先驗證信箱格式是否正確，如果正確則透過向後台sendmail.php傳送Ajax要求，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

$(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("該郵箱尚未註冊！"); 
$("#sub_btn").removeAttr("disabled").val('提 交').css("cursor","pointer"); 
}else{ 
$(".demo").html("<h3>"+msg+"</h3>"); 
} 
}); 
} 
}); 
})

以上使用的jQuery程式碼很方便簡潔的完成了前端互動操作，如果您有一定的jQuery基礎，那上面的程式碼一目了然，不多解釋。

當然別忘了在頁面中載入jQuery庫文件，有的同學常問我說從網上下載了demo怎麼用不了，那80%是jquery或其他文件載入路徑錯了導致沒載入必要的文件。

PHP

sendmail.php需要驗證Email是否存在系統使用者表中，如果有，則讀取使用者訊息，將使用者id、使用者名稱和密碼驚醒md5加密產生一個特別的字符字串作為找回密碼的驗證碼，然後建構URL。同時我們為了控制URL連結的時效性，將記錄使用者提交找回密碼動作的操作時間，最後呼叫郵件發送類別發送郵件到使用者信箱，發送郵件類別smtp.class.php已經打包好，請下載。

代碼如下

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){//該郵箱尚未註冊！ 
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 
$msg = &#39;系統已向您的郵箱發送了一封郵件<br/>請登錄到您的郵箱及時重置您的密碼！&#39;; 
//更新數據發送時間 
mysql_query("update `t_user` set `getpasstime`=&#39;$getpasstime&#39; where id=&#39;$uid &#39;"); 
}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); 
//這裏面的一個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.bitsCN.com - 找回密碼"; 
$emailbody = "親愛的".$email."：<br/>您在".$time."提交了找回密碼請求。請點擊下面的鏈接重置密碼 
（按鈕24小時內有效）。<br/><a href=&#39;".$url."&#39;target=&#39;_blank&#39;>".$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reset .php來驗證信箱。

程式碼如下

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 = &#39;請重新設置密碼，顯示重置密碼表單，<br/>這裏只是演示，略過。&#39;; 
} 
}else{ 
$msg = &#39;無效的鏈接&#39;; 
} 
}else{ 
$msg = &#39;錯誤的鏈接！&#39;; 
} 
echo $msg;

 reset.php先接受參數email和token，然後根據email查詢資料表t_user中是否存在該Email，如果存在則取得該使用者的信息，並且和sendmail .php中的token組合方式一樣建立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，則說明連結有效，而且調轉到重設密碼頁面，最後就是使用者自己設定新密碼了。

小結：透過註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，附上資料表t_user結構：

程式碼如下

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類別檔案

程式碼如下

<?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.bitsCN.com): $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 . "
;";
}
}
}
?>

最後面有個資料庫連接類，這裡就不介紹了大家可以百本站找相關的資料庫連接mysql類哦

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