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防止cookie欺騙，實現(xiàn)7天自動登錄
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防止cookie欺騙，實現(xiàn)7天自動登錄

1.checkLogin.php：驗證登錄文件

  1. <?php
  3. header('content-type:text/html;charset=utf-8');
  5. require './config.php';
  7. $username = $_POST['uname'];
  8. $password = md5($_POST['pwd']);
  9. $islogin = $_POST['islogin'];
  12. $sql = "SELECT * FROM `mu_user` WHERE `username`=? AND `password`=? ";
  13. $stm = $pdo -> prepare($sql);
  14. $stm ->bindParam(1,$username);
  15. $stm ->bindParam(2,$password);
  16. $stm ->execute();
  18. $res = $stm->fetch(PDO::FETCH_ASSOC);
  19. if($stm->rowCount() == 1){
  20.     //驗證成功
  21.     clearCookie();
  22.     if($islogin==1){
  23.         //記住密碼
  24.         setcookie("username",$res['username'],strtotime('+7 days'));
  25.         $token = settoken($res['username'],$res['password'],$res['id']);
  26.         setcookie("token",$token,strtotime('+7 days'));
  28.     }else{
  29.         // 無記住密碼
  30.         setcookie("username",$res['username']);
  31.         $token = settoken($res['username'],$res['password'],$res['id']);
  32.         setcookie("token",$token);
  34.     }
  36.     exit("
  37.         <script>
  38.             alert('登錄成功！');
  39.             location.href ='index.php';
  40.         </script>
  41.     ");
  43. }else{
  44.     //驗證失敗
  45.     exit("
  46.         <script>
  47.             alert('用戶名或密碼有誤！');
  48.             location.href ='login.php';
  49.         </script>
  50.     ");
  52. }
  54. //清除cookie
  55. function clearCookie(){
  56.     setcookie("username",'',time()-1800);
  57.     setcookie("token",'',time()-1800);
  59. }
  60. //設置token
  61. function settoken($username,$password,$id)
  62. {
  63.     $salk = "czx";
  64.     $token = md5($salk.$username.$password)."*".$id;
  65.     return $token;
  66. }

2.config.php：數(shù)據(jù)庫配置文件及連接

  1. <?php
  2. //主機地址
  3. define("DB_HOST","localhost");
  4. //數(shù)據(jù)庫用戶名
  5. define("DB_USER","root");
  6. //數(shù)據(jù)庫密碼
  7. define("DB_PASSWORD","root123");
  8. // 數(shù)據(jù)庫型號
  9. define("DB_TYPE","mysql");
  10. // 數(shù)據(jù)庫名稱
  11. define("DB_NAME","my_user");
  12. //數(shù)據(jù)庫編碼
  13. define('DB_CHARSET', 'utf8');
  14. //數(shù)據(jù)庫端口號
  15. define('DB_PORT', '3306');
  18. //定義PDO的DSN，數(shù)據(jù)源名，包括主機名，端口號和數(shù)據(jù)庫名稱。
  19. define('DSN', DB_TYPE.":host=".DB_HOST.";dbname=".DB_NAME.";charset=".DB_CHARSET);
  22. try{
  23.     //連接數(shù)據(jù)款
  24.     $pdo = new PDO(DSN,DB_USER,DB_PASSWORD);
  26. } catch(PDOException $e){
  27.      //捕捉特定于數(shù)據(jù)庫信息的PDOEXCEPTION 異常
  28.     echo  $e->getMessage();
  30. } catch(Throwable $e){
  31.     //捕捉擁有Throwable接口的錯誤或者其他異常
  32.     echo $e->getMessage();
  34. }

3.login.php：登錄頁面文件

  1. <?php
  2.     if($_GET['act'] == 'out'){
  3.         setcookie("username",'',time()-1800);
  4.         setcookie("token",'',time()-1800);
  5.     }
  6.     $token = $_COOKIE['token'];
  7.     $username = $_COOKIE['username'];
  8.     if(!empty($username) &&!empty($token)&& ($_GET['act'] != 'out')){
  9.         exit("
  10.             <script>
  11.                 alert('用戶已登錄，請直接訪問！');
  12.                 location.href ='index.php';
  13.             </script>
  14.         ");
  15.     }
  19. ?>
  23. <!DOCTYPE html>
  24. <html lang="en">
  25. <head>
  26.     <meta charset="UTF-8">
  27.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  28.     <title>登錄</title>
  29. </head>
  30. <style>
  31.     *{
  32.         margin: 0px;
  33.         padding: 0;
  34.     }
  35.     .contater {
  36.         border: 1px solid #000;
  37.         width: 300px;
  38.         display: flex;
  39.         flex-direction: column;
  40.         margin: auto;
  42.     }
  43.     .contater>div {
  44.         margin-top: 20px;
  46.     }
  47.     h3 {
  48.         text-align: center;
  49.     }
  50.     .contater > .submit >input{
  51.         margin: 15px 140px;
  52.         font-size: 1.5rem;
  54.     }
  56. </style>
  57. <body>
  58. <h3 >登錄</h3>
  59.     <form action="checkLogin.php" method="post">
  60.         <div class="contater">
  61.             <div>
  62.                 <span>用戶名：</span>
  63.                 <input type="text" name="uname">
  64.             </div>
  65.             <div>
  66.                 <span>密&nbsp;&nbsp;&nbsp;碼：</span>
  67.                 <input type="password" name="pwd">
  68.             </div>
  70.             <div>
  71.                 <input type="radio"" name="islogin" value="1">
  72.                 <span>記住密碼</span>
  73.             </div>
  74.             <div class="submit">
  75.                 <input  type="submit" value="登錄">
  76.             </div>
  77.         </div>
  78.     </form>
  79. </body>
  80. </html>

4.index.php:首頁文件

  1. <?php
  2.     $token = $_COOKIE['token'];
  3.     $token_arr = explode("*",$token);
  4.     $uid = end($token_arr);//獲取用戶id
  7.     require "./config.php";
  8.     $sql = "SELECT * FROM `mu_user` WHERE `id`=?";
  9.     $stm = $pdo ->prepare($sql);
  10.     $stm ->bindParam(1,$uid);
  11.     $stm ->execute();
  12.     $result =$stm->fetch(PDO::FETCH_ASSOC);
  14.     if($stm->rowCount()==1){
  16.         $salk = "czx";
  17.         $token_res = md5($salk.$result['username'].$result['password']);
  18.         if($token_res != $token_arr[0]){
  19.             exit("
  20.                 <script>
  21.                 alert('請先登錄');
  22.                 loction.href ='login.php';    
  23.                 </script>            
  24.             ");
  25.         }
  26.     }else{
  28.         exit("
  29.             <script>
  30.                 alert('請您先登錄');
  31.                 location.href='login.php';
  32.             </script>
  33.         ");
  34.     }
  37. ?>
  40. <!DOCTYPE html>
  41. <html lang="en">
  42.   <head>
  43.     <meta charset="UTF-8" />
  44.     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  45.     <title>首頁</title>
  46.   </head>
  48.   <style>
  49.     * {
  50.       margin: 0px;
  51.       padding: 0px;
  52.       box-sizing: border-box;
  53.     }
  54.     h1 {
  55.       text-align: center;
  56.     }
  58.     a {
  59.       text-decoration: none;
  60.       font-size: 1.5rem;
  61.       color: darkgray;
  62.     }
  63.     a:hover {
  64.       background-color: lightskyblue;
  65.       border-radius: 5%;
  66.       /* font-size: 2rem; */
  67.     }
  68.     li {
  69.         list-style-type: none;
  70.         color: darkgray;
  71.     }
  72.     span {
  73.         color: darkgray;
  74.         font-size: 1.5rem;
  75.         margin-right: 15px;
  76.         color:burlywood
  77.     }
  78.     .top {
  79.       /* width: 960px; */
  80.       background-color: linen;
  81.       display: flex;
  82.       flex-flow: row nowrap;
  83.       justify-content: space-between;
  84.     }
  85.     .top > div {
  86.       margin: 10px 40px;
  87.     }
  89.     .column {
  90.       /* width: 960px; */
  91.       display: flex;
  92.       flex-flow: row nowrap;
  93.       justify-content: space-around;
  94.     }
  95.     .column > li {
  96.       margin-right: 65px;
  97.       padding: 0px 20px;
  98.     }
  100.   </style>
  101.   <body>
  102.     <h1>陶轉轉首頁</h1>
  103.     <div class="top">
  104.       <div>
  105.         <ul class="column">
  106.           <li><a href="">LOGO</a></li>
  107.           <li><a href="">首頁</a></li>
  108.           <li><a href="">分類一</a></li>
  109.         </ul>
  110.       </div>
  111.       <div>
  112.         <span>歡迎您,<?php echo $result['username'];?></span>
  113.         <a href="./login.php?act=out">退出</a>
  114.       </div>
  115.     </div>
  116.   </body>
  117. </html>

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老師批語：沒有絕對安全的登錄,但我們可以做到盡可能的安全
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