Home >Backend Development >PHP Tutorial >PHP member password retrieval function implementation example introduction_PHP tutorial
If your website has a membership system, you must have an automatic password retrieval function, which is the forgotten password function. If the user forgets the password, he can directly retrieve the password through his email or mobile phone number. Let me introduce the email retrieval function. Password method.
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 to handle the interaction.
The code is as follows | Copy code | ||||
Enter your registered email address to retrieve your password:
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代码如下 | 复制代码 |
$(function(){ "+msg+"");} }); } }); }) |
The code is as follows | Copy code |
$(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"){
$("#sub_btn").removeAttr("disabled").val('submit').css("cursor","pointer");
}else{
$(".demo").html(""+msg+""); }); } }); }) |
The jQuery code used above is very convenient and concise to complete the front-end interactive operation. If you have a certain jQuery foundation, the above code is clear at a glance and does not require much explanation.
Of course, don’t forget to load the jQuery library file in the page. Some students often ask me why the demo downloaded from www.bKjia.c0m cannot be used. 80% of the time it is because the loading path of jquery or other files is wrong and it is not loaded. Necessary documents.
PHP
sendmail.php needs to verify whether the email exists in the system user table. If so, read the user information, encrypt the user ID, user name and password using md5 to generate a special string as a verification code to retrieve the password, and then Construct URL. At the same time, in order to control the timeliness of the URL link, we will record the operation time when the user submits the password retrieval action, and finally call the email sending class to send the email to the user's mailbox. The sending email class smtp.class.php has been packaged, please download it.
The code is as follows | Copy code | ||||
Please log in to your mailbox to reset your password in time! '; //Update data sending time mysql_query("update `t_user` set `getpasstime`='$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 = ""; //The user's email address of the SMTP server $smtpuser = ""; //SMTP server user account $smtppass = ""; //User password of SMTP server $smtp = new Smtp($smtpserver, $smtpserverport, true, $smtpuser, $smtppass); //A true here means that authentication is used, otherwise authentication is not used. $emailtype = "HTML"; //Email type, text: text; web page: HTML $smtpemailto = $email; $smtpemailfrom = $smtpusermail; $emailsubject = "www.bKjia.c0m - Retrieve password"; $emailbody = "Dear ".$email.": You submitted a password retrieval request at ".$time.". Please click the link below to reset your password (The button is valid for 24 hours). ".$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.bKjia.c0m to verify your email.
The code is as follows | Copy code | ||||
$token = stripslashes(trim($_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... Please reset the password, displays the reset password form, is displayed. This is just a demonstration, skip it. '; }else{ $msg = 'Invalid link'; } }else{ $msg = 'Wrong link! '; } echo $msg;
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Summary: Through registered email verification and password retrieval via email in this article, 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:
代码如下 | 复制代码 |
CREATE TABLE `t_user` ( |
The code is as follows | Copy code |
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类文件
代码如下 | 复制代码 |
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 $pass; /* Private Variables */ /* Constractor */ function smtp($relay_host = "", $smtp_port = 25, $auth = false, $user, $pass) { $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 $this->sock = false; /* Main Function */ function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "") { $body = ereg_replace("(^|(rn))(.)", "1.3", $body); $header .= "MIME-Version:1.0rn"; if ($mailtype == "HTML") { $header .= "To: " . $to . "rn"; if ($cc != "") { $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 ($cc != "") { if ($bcc != "") { $sent = true; foreach ($TO as $rcpt_to) { if (!$this->smtp_sockopen($rcpt_to)) { $sent = false; continue; if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) { $sent = false; fclose($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("", base64_encode($this->pass))) { if (!$this->smtp_putcmd("MAIL", "FROM:<" . $from . ">")) { if (!$this->smtp_putcmd("RCPT", "TO:<" . $to . ">")) { if (!$this->smtp_putcmd("DATA")) { if (!$this->smtp_message($header, $body)) { if (!$this->smtp_eom()) { if (!$this->smtp_putcmd("QUIT")) { return true; function smtp_sockopen($address) { function smtp_sockopen_relay() { $this->sock = @ fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out); if (!($this->sock && $this->smtp_ok())) { $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) { if (!@ getmxrr($domain, $MXHOSTS)) { return false; foreach ($MXHOSTS as $host) { $this->sock = @ fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out); if (!($this->sock && $this->smtp_ok())) { $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) { $this->smtp_debug("> " . str_replace("rn", "n" . "> ", $header . "n> " . $body . "n> ")); return true; function smtp_eom() { $this->smtp_debug(". [EOM]n"); return $this->smtp_ok(); function smtp_ok() { $this->smtp_debug($response . "n"); if (!ereg("^[23]", $response)) { fgets($this->sock, 512); $this->log_write("Error: Remote host returned "" . $response . ""n"); return false; return true; function smtp_putcmd($cmd, $arg = "") { else fputs($this->sock, $cmd . "rn"); $this->smtp_debug("> " . $cmd . "n"); return $this->smtp_ok(); function smtp_error($string) { return false; function log_write($message) { if ($this->log_file == "") { $message = date("M d H:i:s ") . get_current_user() . "[" . getmypid() . "]: " . $message; if (!@ file_exists($this->log_file) || !($fp = @ fopen($this->log_file, "a"))) { return false; flock($fp, LOCK_EX); fputs($fp, $message); fclose($fp); return true; function strip_comment($address) { while (ereg($comment, $address)) { return $address; function get_address($address) { $address = ereg_replace("^.*<(.+)>.*$", "1", $address); return $address; function smtp_debug($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。