PHP member password retrieval function implementation example introduction, PHP password retrieval

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 username, 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 to handle the interaction.

Copy the code as follows

Enter your registered email address to retrieve your password:

< input type="button" class="btn" id="sub_btn" value="Submit">

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 response. The processing results are sent to the front page, please see the jQuery code:

Copy the code as follows
$(function(){
$("#sub_btn").click(function(){
var email = $("#email").val() ;
var preg = /^w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*/; //Match Email
if( email=='' || !preg.test(email)){
$("#chkmsg").html("Please fill in the correct email address!");
}else{
$( "#sub_btn").attr("disabled","disabled").val('Submitting..').css("cursor","default");
$.post("sendmail.php" ,{mail:email},function(msg){
if(msg=="noreg"){
$("#chkmsg").html("This email address has not been registered yet!");
$("#sub_btn").removeAttr("disabled").val('submit').css("cursor","pointer");
}else{
$(".demo"). html("

"+msg+"

");
}
});
}
});
})

The jQuery code used above is very convenient and concise to complete the front-end interactive operation. If you have a certain jQuery foundation, the above code is clear at a glance and does not require much explanation.

Of course, don’t forget to load the jQuery library file in the page. Some students often ask me why the demo downloaded from www.111cn.net cannot be used. 80% of the time it is because the loading path of jquery or other files is wrong and it is not loaded. Necessary documents.
PHP

sendmail.php needs to verify whether the email exists in the system user table. If so, read the user information, encrypt the user ID, user name and password using md5 to generate a special string as a verification code to retrieve the password, and then Construct 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.

Copy the code as follows
include_once("connect.php");//Connect to the database

$email = stripslashes(trim($_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){//This email address has not been registered yet!
echo 'noreg';
exit;
}else{
$row = mysql_fetch_array($query);
$getpasstime = time();
$uid = $row[ 'id'];
$token = md5($uid.$row['username'].$row['password']);//Combined verification code
$url = "/demo/resetpass/ reset.php?email=".$email."
&token=".$token;//Construct URL
$time = date('Y-m-d H:i');
$result = sendmail( $time,$email,$url);
if($result==1){//The email was sent successfully
$msg = 'The system has sent an email to your mailbox
//Update data sending time
mysql_query("update `t_user` set `getpasstime`='$getpasstime' where id='$uid '");
}else{
$ msg = $result;
}
echo $msg;
}

//Send email
function sendmail($time,$email,$url){
include_once ("smtp.class.php");
$smtpserver = ""; //SMTP server, such as smtp.163.com
$smtpserverport = 25; //SMTP server port
$smtpusermail = " "; //User email of SMTP server
$smtpuser = ""; //User account of SMTP server
$smtppass = ""; //User password of SMTP server
$smtp = new Smtp( $smtpserver, $smtpserverport, true, $smtpuser, $smtppass);
//One of true here means authentication is used, otherwise authentication is not used.
$emailtype = "HTML"; //Letter Type, text: text; webpage: HTML
$smtpemailto = $email;
$smtpemailfrom = $smtpusermail;
$emailsubject = "www.111cn.net - Retrieve Password";
$emailbody = "Dear ".$email.":
You submitted a password retrieval request at ".$time.". Please click the link below to reset your password
(the button is valid within 24 hours) .
".$url."";
$rs = $smtp-> ;sendmail($smtpemailto, $smtpemailfrom, $emailsubject, $emailbody, $emailtype);

return $rs;
}

Okay, at this time you will receive a password retrieval email from helloweba in your email. There is a URL link in the email content. Click the link to reset.php of www.111cn.net to verify your email.

Copy the code as follows
include_once("connect.php");//Connect to the database

$token = stripslashes(trim($_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 = 'This link has expired! ';
}else{
//Reset password...
$msg = 'Please reset your password and display the reset password form,
This is just a demonstration, skip it. ';
}
}else{
$msg = 'Invalid link';
}
}else{
$msg = 'Wrong link! ';
}
echo $msg;

reset.php first accepts the parameters email and token, and then queries whether the email exists in the data table t_user based on 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. Then compare it with the token passed by the URL. If the current time is more than 24 hours different from the time when the email was sent, it will prompt "The link has expired!". Otherwise, it means that the link is valid and you will be redirected to the password reset page. Finally, it is up to the user to set a new password.

Summary: Through registered email verification and password retrieval through this article’s email, we know the application of sending emails in website development and its importance. Of course, SMS verification applications are also popular now. This requires related SMS interface docking. .

Finally, attach the data table t_user structure:

Copy the code 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 Copy the code

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.111cn.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 . [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 . "
;";
}
}
}
?>

最后面有个数据库连接类，这里就不介绍了大大家可以百本站找相关的数据库连接mysql类哦
from:http://www.111cn.net/phper/php/54606.htm

PHP member password retrieval function implementation example introduction, PHP password retrieval_PHP tutorial

PHP member password retrieval function implementation example introduction, PHP password retrieval

"+msg+"