PHP simple method to implement member password retrieval function

This article mainly introduces how to simply implement the member's password retrieval function in PHP. Interested friends can refer to it. I hope it will be helpful to everyone.

Setting Ideas

#1. Users need to provide an E-MAIL when registering. The purpose is to use this email to retrieve the password.

2. When the user forgets their password or user name, click the "Retrieve Password" hyperlink on the login page, open the form, enter the email address used for registration, and submit.

3. The system finds the user information from the database through the mailbox, and updates the user's password to a temporary password (for example: 12345678).

4. The system uses the Jmail function to send the user's information to the user's mailbox (the content includes: user name, temporary password, and prompts to remind the user to change the temporary password in time).

5. Users can log in with a temporary password.

HTML

We place a page on the password retrieval page that requires the user to enter the email address used for registration, and then submit the front-end js for processing Interaction.

The code is as follows

<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>

##jQuery

After the user enters the email address and clicks submit, jQuery first verifies whether the email format is correct. If it is correct, it sends an Ajax request to the background sendmail.php. sendmail.php is responsible for verifying whether the email address exists and sending the email, and will return the corresponding The processing results are sent to the front page, please see the jQuery code:

The code is as follows

$(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>"); 
} 
}); 
} 
}); 
})

The jQuery code used above is very It completes the front-end interactive operation conveniently and concisely. If you have a certain jQuery foundation, the above code is clear at a glance and requires no explanation.

Of course, don’t forget to load the jQuery library file on the page. Some students often ask me why they can’t use the demo downloaded from the Internet. 80% of the time it’s because the loading path of jquery or other files is wrong, so it’s not necessary to load it. document.

PHP

sendmail.php needs to verify whether the email exists in the system user table. If so, read the user information and add the user id , the user name and password are awakened by md5 encryption to generate a special string as a verification code for retrieving the password, and then construct the URL. At the same time, in order to control the timeliness of the URL link, we will record the operation time when the user submits the password retrieval action, and finally call the email sending class to send the email to the user's mailbox. The sending email class smtp.class.php has been packaged, please download it.

The code is as follows

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 
$msg = &#39;系统已向您的邮箱发送了一封邮件<br/>请登录到您的邮箱及时重置您的密码！&#39;; 
//更新数据发送时间 
mysql_query("update `t_user` set `getpasstime`=&#39;$getpasstime&#39; where id=&#39;$uid &#39;"); 
}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; 
}

Okay, at this time your mailbox will receive an email from helloweba There is a URL link in the password retrieval email. Click the link to reset.php to verify the email.

The code is as follows

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 = &#39;无效的链接&#39;; 
} 
}else{ 
$msg = &#39;错误的链接！&#39;; 
} 
echo $msg;

reset.php first accepts the parameters email and token, and then queries the data table t_user based on the email Whether the email exists in the email, if it exists, obtain the user's information, and construct the token value in the same way as the token combination in sendmail.php, and then compare it with the token passed by the url, if the current time is different from the time when the email was sent If it exceeds 24 hours, it will prompt "The link has expired!"; otherwise, it means that the link is valid and it will redirect to the password reset page. Finally, the user will set a new password.

Summary: Password retrieval through registered email verification and this article email, we know the application of sending emails in website development and its importance, of course, now SMS verification applications are also popular, and this only needs to be connected to the relevant SMS interface.

Finally, attach the data table t_user structure:

The code is as follows

##

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 class file

The code is as follows

<?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 . "
;";
}
}
}
?>

There is a database connection class at the end, which will not be introduced here. You can find related database connection mysql classes on this site

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.

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