PHP member Retrieve the password function simple Realization _php Example

Set up ideas

1, user registration needs to provide an e-mail mailbox, the purpose is to use the mailbox to retrieve the password.

2, when the user forgets the password or the user name, clicks the login page "retrieves the password" the hyperlink, opens the form, and enters the registration e-mail mailbox, submits.

3, the system through the mailbox, from the database to find the user information, and update the user's password for a temporary password (such as: 12345678).

4, the system with the help of the JMail function of the user's information sent to the user's mailbox (content includes: User name, temporary password, to remind users to modify the temporary password prompt language).

5, users can login with temporary password.

Html

We placed on the page to retrieve the password to require the user to enter the registration of the mailbox, and then submitted to the front desk JS to handle the interaction.

The code is as follows

<p><strong> Enter your registered e-mail, retrieve the password:</strong></p> 
<p><input type= "text" class= "input "Name=" email "id=" ><span id= "chkmsg" ></span></p> 
<p><input "button" class= "btn" id= "sub_btn" value= "Submit" ></p>

Jquery

After the user enters the mailbox and clicks Submit, jquery first verifies that the mailbox is in the correct format. If correct, by sending an AJAX request to the background sendmail.php, sendmail.php is responsible for verifying that the mailbox exists and sending the message, and will return the corresponding processing results to the foreground page, see jquery code:

The code is 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 mailbox!") "); 
} else{ 
$ ("#sub_btn"). attr ("Disabled", "disabled"). Val (' Submit in ... '). CSS ("cursor", "Default"); 
$.post ("sendmail.php", {mail:email},function (msg) { 
if (msg== "Noreg") { 
$ ("#chkmsg"). HTML ("This mailbox has not been registered!) "); 
$ ("#sub_btn"). Removeattr ("Disabled"). Val (' Submit '). CSS ("cursor", "pointer"); 
} else{ 
$ (". Demo"). HTML (" 
 

The above jquery code is convenient and simple to complete the front-end interaction, if you have a certain jquery basis, the above code at a glance, not much explanation.

Of course, do not forget to load the jquery library file in the page, some students often asked me how to download the demo from the Internet How to use, that 80% is jquery or other file loading path wrong caused not to load the necessary files.

Php

Sendmail.php needs to verify whether the email exists in the System User table, if so, read the user information, wake up the user ID, username and password MD5 encryption to generate a special string as the code to retrieve the password, and then construct the URL. At the same time, in order to control the timeliness of the URL link, will record the user submitted to retrieve the password action time, the last call to Send mail class mail to the user's mailbox, send mail class smtp.class.php has been packaged, please download.

The code is as follows

Include_once ("connect.php")//Connection 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 ($num ==0) {//The mailbox has not yet been registered! 
Echo ' Noreg '; 
Exit 
}else{$row = mysql_fetch_array ($query); 
$getpasstime = time (); 
$uid = $row [' id ']; 
$token = MD5 ($uid. $row [' username ']. $row [' password ']);//Combined authentication 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) {//mail successfully sent $msg = ' The system has sent a message to your mailbox <br/> please login to your mailbox to reset your password in time! 
'; 
Update data send time mysql_query ("Update" T_user ' Set ' getpasstime ' = ' $getpasstime ' where id= ' $uid '); 
}else{$msg = $result; 
Echo $msg; 
}//Send mail function sendmail ($time, $email, $url) {include_once ("smtp.class.php"); $smtpserver = ""; SMTP server, such as smtp.163.com $smtpserverport = 25; SMTP Server Port $smtpusermail = ""; SMTP server's user mailbox $smtpuser = ""; SmTP server's user account $smtppass = ""; 
The user password for the SMTP server $SMTP = new SMTP ($smtpserver, $smtpserverport, True, $smtpuser, $smtppass); 
One of the true in this is that it means using authentication, or not using authentication. $emailtype = "HTML"; 
Letter type, text: texts; Web page: HTML $smtpemailto = $email; 
$smtpemailfrom = $smtpusermail; 
$emailsubject = "Www.jb51.net-retrieve password"; $emailbody = "Dear". $email. " :<br/> you in ". $time." A request to retrieve the password was submitted. Please click the link below to reset the password (the button is valid for 24 hours). <br/><a href= ' ". $url." ' target= ' _blank ' > '. $url. " 
</a> "; 

$rs = $smtp->sendmail ($smtpemailto, $smtpemailfrom, $emailsubject, $emailbody, $emailtype); 
return $rs; }

OK, this time your mailbox will receive a password from Helloweba retrieve mail, the content of the message has a URL link, click the link to reset.php to verify the mailbox.

The code is as follows

Include_once ("connect.php")//Connection 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 = ' The link has expired! '; 
} else{ 
//Reset Password ... 
$msg = ' Reset password, show reset Password form,<br/> here just demo, skip. '; 
} 
} else{ 
$msg = ' Invalid link '} 
} else{ 
$msg = ' wrong link! '; 
} 
Echo $msg;

reset.php first accept the parameters of email and token, and then according to the email query datasheet T_user Whether there is an email, if there is to get the user information, and build the token value in the same way as the token in sendmail.php, then compare it to the token of the URL, and if the current time differs more than 24 hours from the time the message was sent, prompt "The link has expired!" , on the other hand, the link is valid and turned to the Reset Password page, and finally the user sets the new password himself.

Summary: through the registered mailbox authentication and this article to retrieve the password, we know that sends the mail in the website development application as well as its importance, certainly, now also popular short note authentication application, this needs the correlation short message interface docking on can.

Finally, the data sheet T_user structure is attached:

The code is as follows

CREATE TABLE ' t_user ' ( 
' id ' int (one) not null auto_increment, 
' username ' varchar (=) NOT null, 
' password ' var Char not NULL, ' email ' varchar (x) not NULL, 
' getpasstime ' int (m) not NULL, 
PRIMARY KEY (' id ') 
EN Gine=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 = =, $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 = "", $addition

Al_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-&GT;SMTP_PUTCM

D ("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 $this->smtp_error ("Sending QUIT command");}
return true; The function Smtp_sockopen ($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;;;

The 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; The 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; The 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-&GT;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;

The 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 $this-&GT;SMTP_OK (); The function Smtp_error ($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;

The function get_address ($address) {$address = Ereg_replace ([[trn]) + "," ", $address);

$address = Ereg_replace ("^.*< (. +) >.*$", "1", $address);
return $address; The function Smtp_debug ($message) {if ($this->debug) {echo $message.
"
;"; }}}?>

The last side has a database connection class, here will not introduce everyone can find the relevant database connection MySQL class OH

The above PHP member to retrieve the password function simple realization is small arranges to share to everybody's content, hoped can give everybody a reference, also hoped that everybody supports the cloud habitat community.