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PHP+MySQL登录注册，完整版，详细注释
纯手写打造。
下载地址：http://download.csdn.net/detail/qq_33599520/9779970
项目结构：
下面是代码：
<!DOCTYPE html><html lang="cn"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>后台登陆</title><link href="http://www.mamicode.com/css/login.css" type="text/css" rel="stylesheet"><script type="text/javascript" src="http://www.mamicode.com/js/login.js"></script></head><body> <div class="login"> <div class="message">大数据的事件智能抓取和画像后台登陆</div> <div id="darkbannerwrap"></div> <form name="login" action="php/login.php" method="post" onsubmit="return check()"> <input name="name" id="name" placeholder="请输入登录帐号" type="text" required="required" maxlength="16"> <hr class="hr15"> <input name="password" id="password" placeholder="请输入登录密码" type="password" required="required" maxlength="16"> <hr class="hr15"> <input value="http://www.mamicode.com/登录" style="width:100%;" type="submit" name="submit"> <a href="http://www.mamicode.com/result.html">注册</a> <a href="http://www.mamicode.com/#">忘记密码</a> <hr class="hr20"> </form> </div></body></html>
<!DOCTYPE html><html lang="cn"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>后台注册</title><link href="http://www.mamicode.com/css/result.css" type="text/css" rel="stylesheet"><script type="text/javascript" src="http://www.mamicode.com/js/result.js"></script></head><body> <div class="login"> <div class="message">大数据的事件智能抓取和画像后台注册</div> <div id="darkbannerwrap"></div> <form name="result" action="php/result.php" method="post" onsubmit="return check()"> <input name="name" id="name" placeholder="请输入帐号" type="text" required="required" maxlength="16"> <hr class="hr15"> <input name="password" id="password" placeholder="请输入密码" type="password" required="required" maxlength="16"> <hr class="hr15"> <input name="pwd" id="pwd" placeholder="请再次输入密码" type="password" required="required" maxlength="16"> <hr class="hr15"> <input value="http://www.mamicode.com/注册" style="width:100%;" type="submit" name="submit"> <a href="http://www.mamicode.com/login.html">返回登录</a> <a href="http://www.mamicode.com/#">忘记密码</a> <hr class="hr20"> </form> </div></body></html>
function $(id) { return document.getElementById(id); } function check() { var password = $("password").value; if(password == "") { alert("密码不能为空"); $("password").focus(); return false; } if(password.length < 6) { alert("密码长度必须为6-16位"); $("password").focus(); return false; } }
function $(id) { return document.getElementById(id); } function check() { var password = $("password").value; var pwd = $("pwd").value; if(password == "") { alert("密码不能为空"); $("password").focus(); return false; } if(password.length < 6) { alert("密码长度必须为6-16位"); $("password").focus(); return false; } if(pwd != password) { alert("您两次输入的密码不一致！"); $("pwd").focus(); return false; } }
*{ font: 13px/1.5 ‘微软雅黑‘, Verdana, Helvetica, Arial, sans-serif; -webkit-box-sizing: border-box; -moz-box-sizing: border-box; -box-sizing: border-box; padding:0; margin:0; list-style:none; box-sizing: border-box;}body,html{ height:100%; overflow:hidden;}body{ background:url(../images/web_login_bg.jpg) no-repeat center; background-size: cover;}a{ color:#27A9E3; text-decoration:none; cursor:pointer;}.login{ margin: 150px auto 0 auto; min-height: 420px; max-width: 420px; padding: 40px; background-color: #ffffff; margin-left: auto; margin-right: auto; border-radius: 4px; /* overflow-x: hidden; */ box-sizing: border-box;}a.logo{ display: block; height: 58px; width: 167px; margin: 0 auto 30px auto; background-size: 167px 42px;}.message { margin: 10px 0 0 -58px; padding: 18px 10px 18px 60px; background: #27A9E3; position: relative; color: #fff; font-size: 16px;}#darkbannerwrap { background: url(../images/aiwrap.png); width: 18px; height: 10px; margin: 0 0 20px -58px; position: relative;}input[type=text],input[type=file],input[type=password],input[type=email], select { border: 1px solid #DCDEE0; vertical-align: middle; border-radius: 3px; height: 50px; padding: 0px 16px; font-size: 14px; color: #555555; outline:none; width:100%;}input[type=text]:focus,input[type=file]:focus,input[type=password]:focus,input[type=email]:focus, select:focus { border: 1px solid #27A9E3;}input[type=submit],input[type=button]{ display: inline-block; vertical-align: middle; padding: 12px 24px; margin: 0px; font-size: 18px; line-height: 24px; text-align: center; white-space: nowrap; vertical-align: middle; cursor: pointer; color: #ffffff; background-color: #27A9E3; border-radius: 3px; border: none; -webkit-appearance: none; outline:none; width:100%;}hr.hr15 { height: 15px; border: none; margin: 0px; padding: 0px; width: 100%;}hr.hr20 { height: 20px; border: none; margin: 0px; padding: 0px; width: 100%;}.copyright{ font-size:14px; color:rgba(255,255,255,0.85); display:block; position:absolute; bottom:15px; right:15px;}
*{ font: 13px/1.5 ‘微软雅黑‘, Verdana, Helvetica, Arial, sans-serif; -webkit-box-sizing: border-box; -moz-box-sizing: border-box; -box-sizing: border-box; padding:0; margin:0; list-style:none; box-sizing: border-box;}body,html{ height:100%; overflow:hidden;}body{ background:url(../images/web_result_bg.jpg) no-repeat center; background-size: cover;}a{ color:#27A9E3; text-decoration:none; cursor:pointer;}.login{ margin: 150px auto 0 auto; min-height: 420px; max-width: 420px; padding: 40px; background-color: #ffffff; margin-left: auto; margin-right: auto; border-radius: 4px; /* overflow-x: hidden; */ box-sizing: border-box;}a.logo{ display: block; height: 58px; width: 167px; margin: 0 auto 30px auto; background-size: 167px 42px;}.message { margin: 10px 0 0 -58px; padding: 18px 10px 18px 60px; background: #27A9E3; position: relative; color: #fff; font-size: 16px;}#darkbannerwrap { background: url(../images/aiwrap.png); width: 18px; height: 10px; margin: 0 0 20px -58px; position: relative;}input[type=text],input[type=file],input[type=password],input[type=email], select { border: 1px solid #DCDEE0; vertical-align: middle; border-radius: 3px; height: 50px; padding: 0px 16px; font-size: 14px; color: #555555; outline:none; width:100%;}input[type=text]:focus,input[type=file]:focus,input[type=password]:focus,input[type=email]:focus, select:focus { border: 1px solid #27A9E3;}input[type=submit],input[type=button]{ display: inline-block; vertical-align: middle; padding: 12px 24px; margin: 0px; font-size: 18px; line-height: 24px; text-align: center; white-space: nowrap; vertical-align: middle; cursor: pointer; color: #ffffff; background-color: #27A9E3; border-radius: 3px; border: none; -webkit-appearance: none; outline:none; width:100%;}hr.hr15 { height: 15px; border: none; margin: 0px; padding: 0px; width: 100%;}hr.hr20 { height: 20px; border: none; margin: 0px; padding: 0px; width: 100%;}.copyright{ font-size:14px; color:rgba(255,255,255,0.85); display:block; position:absolute; bottom:15px; right:15px;}
<?php $server="localhost";//主机 $db_username="root";//你的数据库用户名 $db_password="root";//你的数据库密码 $con = mysql_connect($server,$db_username,$db_password);//链接数据库 if(!$con){ die("can‘t connect".mysql_error());//如果链接失败输出错误 } mysql_select_db(‘test‘,$con);//选择数据库（test是数据库名称） //字符转换，读库 mysql_query("set character set ‘utf-8‘"); //写库 mysql_query("set names ‘utf-8‘");?>
<?PHP header("Content-Type: text/html; charset=utf8"); if(!isset($_POST["submit"])){ exit("非法访问！"); }//检测是否有submit操作 include(‘connect.php‘);//链接数据库 $name = $_POST[‘name‘];//post获得用户名表单值 $passowrd = MD5($_POST[‘password‘]);//post获得用户密码单值,使用MD5加密，不可逆 if ($name && $passowrd){//如果用户名和密码都不为空 $sql = "select * from admin where username = ‘$name‘ and password=‘$passowrd‘";//检测数据库是否有对应的username和password的sql $result = mysql_query($sql);//执行sql $rows=mysql_num_rows($result);//返回一个数值 if($rows){//0 false 1 true //登录成功 session_start();//启动Session $_SESSION[‘name‘] = $_POST[‘name‘]; header("refresh:0;url=sucess.php");//如果成功跳转至sucess.php页面 exit; }else{ echo "用户名或密码错误，请重新登录！"; echo " <script> setTimeout(function(){window.location.href=http://www.mamicode.com/‘../login.html‘;},1000);";//如果错误使用js 1秒后跳转到登录页面重试; } }else{//如果用户名或密码有空 echo "用户名或密码填写不完整，请重新登录！"; echo " <script> setTimeout(function(){window.location.href=http://www.mamicode.com/‘../login.html‘;},1000);"; //如果错误使用js 1秒后跳转到登录页面重试; } mysql_close();//关闭数据库?>
<?php session_start();//初始化session session_destroy();//注销session header("location:../login.html");//注销session并跳转?>
<?php header("Content-Type: text/html; charset=utf8"); if(!isset($_POST[‘submit‘])){ exit("错误执行"); }//判断是否有submit操作 $name=$_POST[‘name‘];//post获取表单里的name $password=MD5($_POST[‘password‘]);//post获取表单里的password,使用MD5加密，不可逆 include(‘connect.php‘);//链接数据库 $sql = "select username from admin where username = ‘$name‘";//SQL语句 $result = mysql_query($sql);//执行SQL语句 $num = mysql_num_rows($result);//统计执行结果影响的行数 if ($num) {//如果已经存在该用户 echo "<script>alert(‘温馨提示：用户存在！‘); history.go(-1);</script>"; } else { $q="insert into admin(id,username,password) values (null,‘$name‘,‘$password‘)";//向数据库插入表单传来的值的sql $reslut=mysql_query($q,$con);//执行sql if (!$reslut){ die(‘Error: ‘ . mysql_error());//如果sql执行失败输出错误 }else{ echo "注册成功";//成功输出注册成功 echo " <script> setTimeout(function(){window.location.href=http://www.mamicode.com/‘../login.html‘;},1000);"; //如果注册成功使用js 1秒后跳转到登录页面; } } mysql_close($con);//关闭数据库?>
<?PHP ini_set("error_reporting","E_ALL & ~E_NOTICE"); session_start();//启动Session if(!$_SESSION[‘name‘]){ echo "<script language=‘javascript‘>alert(‘对不起，您未登录！‘);history.back();</script>"; }?><html lang="cn"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>欢迎成功进入首页！</title></head><body> <h1>当前登录用户：</h1> <h2> <?PHP echo $_SESSION[‘name‘]; ?> </h2> <a href="http://www.mamicode.com/logout.php">注销用户</a></body></html>
<?php ?>
纯手写，如果有不足之处请谅解。
PHP+MySQL登录注册，完整版，详细注释
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