PHPPHP+Mysql+jQuery找回密码
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常所说的密码找回功能不是真的能把忘记的密码找回，因为我们的密码是加密保存的，一般开发者会在验证用户信息后通过程序生成一个新密码或者生成一个特定的链接并发送邮件到用户邮箱，用户从邮箱链接到网站的重置密码模块重新设置新密码。
当然现在有的网站也有手机短信的方式找回密码，原理就是通过发送验证码来验明正身，和发送邮件验证一样，最终还是要通过重置密码来完成找回密码的流程。
本文将使用php+mysql+jQuery来实现一个密码找回的功能，一般步骤是：
1.表单输入注册时的邮箱；
2.验证用户邮箱是否正确，如果用户邮箱不存在网站的用户表中，则提示用户邮箱未注册；
3.发送邮件，如果用户邮箱确实存在用户表中，则组合用于验证用户信息的字符串，并构造URL发送到用户邮箱中;
4.用户登录邮箱收取邮件，点击URL链接到网站验证程序；
5.网站程序通过用户请求的字符串查询本地用户表，比对用户信息是否正确；
6.如果正确则转到重置密码页面重新设置新密码，反之则提示用户验证无效。
html
我们在找回密码的页面上放置一个要求用户输入注册时所用的邮箱，然后提交前台js来处理交互。
<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
当用户输入完邮箱并点击提交后，jQuery先验证邮箱格式是否正确，如果正确则通过向后台sendmail.php发送Ajax请求，sendmail.php负责验证邮箱是否存在和发送邮件，并会返回相应的处理结果给前台页面，请看jQuery代码：
$(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>");
}
});
}
});
})
以上使用的jQuery代码很方便简洁的完成了前端交互操作，如果您有一定的jQuery基础，那上面的代码一目了然，不多解释。
当然别忘了在页面中加载jQuery库文件，有的同学经常问我说从helloweba.com下载了demo怎么用不了，那80%是jquery或者其他文件加载路径错了导致没加载必要的文件。
PHP
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
$url = "http://www.helloweba.com/demo/resetpass/reset.php?email=".$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
$msg = '系统已向您的邮箱发送了一封邮件<br/>请登录到您的邮箱及时重置您的密码！';
//更新数据发送时间
mysql_query("update `t_user` set `getpasstime`='$getpasstime' where id='$uid '");
}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 = "Helloweba.com - 找回密码";
$emailbody = "亲爱的".$email."：<br/>您在".$time."提交了找回密码请求。请点击下面的链接重置密码
（按钮24小时内有效）。<br/><a href='".$url."'target='_blank'>".$url."</a>";
$rs = $smtp->sendmail($smtpemailto, $smtpemailfrom, $emailsubject, $emailbody, $emailtype);
return $rs;
}
好了，这个时候你的邮箱将会收到一封来自helloweba的密码找回邮件，邮件内容中有一个URL链接，点击该链接到helloweba.com的reset.php来验证邮箱。
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 = '请重新设置密码，显示重置密码表单，<br/>这里只是演示，略过。';
}
}else{
$msg = '无效的链接';
}
}else{
$msg = '错误的链接！';
}
echo $msg;
小结：通过注册邮箱验证与本文邮件找回密码，我们知道发送邮件在网站开发中的应用以及它的重要性，当然，现在也流行短信验证应用，这个需要相关的短信接口对接就可以了。
最后，附上数据表t_user结构：
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代码：
<?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("(^|( ))(.)", "1.3", $body); $header .= "MIME-Version:1.0 "; if ($mailtype == "HTML") { $header .= "Content-Type:text/html "; } $header .= "To: " . $to . " "; if ($cc != "") { $header .= "Cc: " . $cc . " "; } $header .= "From: $from<" . $from . "> "; $header .= "Subject: " . $subject . " "; $header .= $additional_headers; $header .= "Date: " . date("r") . " "; $header .= "X-Mailer:By Redhat (PHP/" . phpversion() . ") "; list ($msec, $sec) = explode(" ", microtime()); $header .= "Message-ID: <" . date("YmdHis", $sec) . "." . ($msec * 1000000) . "." . $mail_from . "> "; $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 . " "); $sent = false; continue; } if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) { $this->log_write("E-mail has been sent to <" . $rcpt_to . "> "); } else { $this->log_write("Error: Cannot send email to <" . $rcpt_to . "> "); $sent = false; } fclose($this->sock); $this->log_write("Disconnected from remote host "); } 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 . " "); $this->sock = @ fsockopen($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 . " "); $this->log_write("Error: " . $errstr . " (" . $errno . ") "); return false; } $this->log_write("Connected to relay host " . $this->relay_host . " "); return true; ; } function smtp_sockopen_mx($address) { $domain = ereg_replace("^.+@([^@]+)$", "1", $address); if (!@ getmxrr($domain, $MXHOSTS)) { $this->log_write("Error: Cannot resolve MX "" . $domain . "" "); return false; } foreach ($MXHOSTS as $host) { $this->log_write("Trying to " . $host . ":" . $this->smtp_port . " "); $this->sock = @ fsockopen($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 . " "); $this->log_write("Error: " . $errstr . " (" . $errno . ") "); continue; } $this->log_write("Connected to mx host " . $host . " "); return true; } $this->log_write("Error: Cannot connect to any mx hosts (" . implode(", ", $MXHOSTS) . ") "); return false; } function smtp_message($header, $body) { fputs($this->sock, $header . " " . $body); $this->smtp_debug("> " . str_replace(" ", " " . "> ", $header . " > " . $body . " > ")); return true; } function smtp_eom() { fputs($this->sock, " . "); $this->smtp_debug(". [EOM] "); return $this->smtp_ok(); } function smtp_ok() { $response = str_replace(" ", "", fgets($this->sock, 512)); $this->smtp_debug($response . " "); if (!ereg("^[23]", $response)) { fputs($this->sock, "QUIT "); fgets($this->sock, 512); $this->log_write("Error: Remote host returned "" . $response . "" "); return false; } return true; } function smtp_putcmd($cmd, $arg = "") { if ($arg != "") { if ($cmd == "") $cmd = $arg; else $cmd = $cmd . " " . $arg; } fputs($this->sock, $cmd . " "); $this->smtp_debug("> " . $cmd . " "); return $this->smtp_ok(); } function smtp_error($string) { $this->log_write("Error: Error occurred while " . $string . ". "); return false; } function log_write($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 "" . $this->log_file . "" "); return false; ; } flock($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("([ ])+", "", $address); $address = ereg_replace("^.*<(.+)>.*$", "1", $address); return $address; } function smtp_debug($message) { if ($this->debug) { echo $message . " ;"; } } } ?> |
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