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博客列表 >PHP实战演练：登陆和注册

PHP实战演练：登陆和注册

李东亚¹⁸⁰³⁹⁵⁴⁰¹²⁰
李东亚¹⁸⁰³⁹⁵⁴⁰¹²⁰原创
2020年05月13日 13:18:24910浏览

登陆注册实战案例：

一、COOKIE形式

1、登陆

  1. <?php
  2. if(isset($_COOKIE['user'])){
  3.     // echo 'OK';
  4.     // exit('<script>alert("登陆成功！");location.href="index.php";</script>');
  5.     exit('<script>alert("已经登陆，请勿重复等登陆！");location.href="index.php";</script>');
  6. }
  9. ?>
  10. <!DOCTYPE html>
  11. <html lang="en">
  13. <head>
  14.     <meta charset="UTF-8">
  15.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  16.     <title>用户注册</title>
  17.     <style>
  18.     * {
  19.         margin: 0;
  20.         padding: 0;
  21.     }
  23.     h2 {
  24.         /* display: block; */
  25.         width: 350px;
  26.         margin: 0 auto;
  27.         text-align: center;
  28.         padding-top: 10px;
  29.         box-sizing: border-box;
  31.     }
  34.     form {
  35.         margin: 10px auto;
  36.         width: 350px;
  37.         height: 250px;
  38.         background-color: #5384e8;
  39.         display: flex;
  40.         flex-flow: column nowrap;
  41.         justify-content: space-evenly;
  42.         align-content: center;
  43.         align-items: center;
  44.         font-size: 1.2rem;
  46.     }
  48.     form:hover {
  49.         box-shadow: 0 0 5px #626262;
  50.     }
  52.     form>.button {
  53.         width: 280px;
  54.         display: flex;
  55.         justify-content: space-evenly;
  56.     }
  58.     form>.button>input {
  59.         width: 100px;
  60.         height: 30px;
  61.         background-color: #00bb00;
  62.         border: none;
  63.         border-radius: 15px;
  64.     }
  66.     form>.button>input:hover {
  67.         background-color: red;
  68.         color: white;
  69.     }
  71.     a {
  72.         color: white;
  73.         text-decoration: none;
  74.     }
  75.     </style>
  76. </head>
  78. <body>
  79.     <h2>用户注册</h2>
  80.     <form action="handle.php?action=select" method="POST">
  81.         <!-- <fieldset> -->
  82.         <!-- <legend align="center">用户注册</legend> -->
  83.         <div>
  84.             <label for="username">账户：</label>
  85.             <input type="email" required name="username" id="username" placeholder="example@163.com">
  86.         </div>
  87.         <div>
  88.             <label for="p2">密码：</label>
  89.             <input type="password" required name="p2" id="p2" placeholder="不少于六位">
  90.         </div>
  91.         <!-- </fieldset> -->
  92.         <div class="button">
  93.             <input type="submit" value="登陆">
  94.             <input type="reset" value="重置">
  96.         </div>
  97.         <div>
  98.             <a href="regist.php">没有账号,点击此处注册!</a>
  99.         </div>
  100.     </form>
  101. </body>
  103. </html>

2、注册

  1. <!DOCTYPE html>
  2. <html lang="en">
  4. <head>
  5.     <meta charset="UTF-8">
  6.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  7.     <title>用户注册</title>
  8.     <style>
  9.     * {
  10.         margin: 0;
  11.         padding: 0;
  12.     }
  14.     h2 {
  15.         /* display: block; */
  16.         width: 350px;
  17.         margin: 0 auto;
  18.         text-align: center;
  19.         padding-top: 10px;
  20.         box-sizing: border-box;
  22.     }
  25.     form {
  26.         margin: 10px auto;
  27.         width: 350px;
  28.         height: 450px;
  29.         background-color: #5384e8;
  30.         display: flex;
  31.         flex-flow: column nowrap;
  32.         justify-content: space-evenly;
  33.         align-content: center;
  34.         align-items: center;
  35.         font-size: 1.2rem;
  37.     }
  39.     form:hover {
  40.         box-shadow: 0 0 5px #626262;
  41.     }
  43.     form>.button {
  44.         width: 280px;
  45.         display: flex;
  46.         justify-content: space-evenly;
  47.     }
  49.     form>.button>input {
  50.         width: 100px;
  51.         height: 30px;
  52.         background-color: #00bb00;
  53.         border: none;
  54.         border-radius: 15px;
  55.     }
  57.     form>.button>input:hover {
  58.         background-color: red;
  59.         color: white;
  60.     }
  62.     a {
  63.         color: white;
  64.         text-decoration: none;
  65.     }
  66.     </style>
  67. </head>
  69. <body>
  70.     <h2>用户注册</h2>
  71.     <form action="handle.php?action=insert" method="POST" name="my_form">
  72.         <!-- <fieldset> -->
  73.         <!-- <legend align="center">用户注册</legend> -->
  74.         <div>
  75.             <label for="username">账户：</label>
  76.             <input type="email" required name="username" id="username" placeholder="example@163.com">
  77.         </div>
  78.         <div>
  79.             <label for="name">账户：</label>
  80.             <input type="text" required name="name" id="name" placeholder="输入你的昵称">
  81.         </div>
  82.         <div>
  83.             <label for="p1">密码：</label>
  84.             <input type="password" required name="p1" id="p1" placeholder="不少于六位">
  85.         </div>
  86.         <div>
  87.             <label for="p2">密码：</label>
  88.             <input type="password" required name="p2" id="p2" placeholder="不少于六位">
  89.         </div>
  90.         <!-- <span id="tips" name="tips" style="color: red"></span> -->
  93.         <!-- </fieldset> -->
  94.         <div class="button">
  95.             <input type="submit" value="注册">
  96.             <input type="reset" value="重置">
  98.         </div>
  99.         <div>
  100.             <a href="login.php">已有账号,点击此处登陆!</a>
  101.         </div>
  102.     </form>
  103. </body>
  105. </html>

3、首页

  1. <?php
  2. if(isset($_COOKIE['user'])){
  3.     $user=unserialize($_COOKIE['user']);
  4.     // var_dump($user);
  5.     $username=$user['name'];
  6.     $states="登出";
  7.     $statesurl="handle.php?action=logout";
  8. }
  10. ?>
  11. <!DOCTYPE html>
  12. <html lang="en">
  14. <head>
  15.     <meta charset="UTF-8">
  16.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  17.     <title>首页</title>
  18.     <style>
  19.     * {
  20.         margin: 0;
  21.         padding: 0;
  22.     }
  24.     a {
  25.         text-decoration: none;
  26.     }
  28.     nav {
  29.         width: 100%;
  30.         height: 40px;
  31.         background: #00ffff;
  32.         display: flex;
  33.         justify-content: space-between;
  34.         align-items: center;
  35.         padding: 0 20px;
  36.         box-sizing: border-box;
  37.         font-size: 1.4rem;
  39.     }
  41.     nav a {
  42.         color: white;
  43.     }
  44.     </style>
  45. </head>
  47. <body>
  48.     <nav>
  49.         <a href="">首页</a>
  50.         <div><a href="<?php echo null?? "regist.php";?>"><?php echo $username ?? "注册"; ?></a>&nbsp;&nbsp;&nbsp;<a
  51.                 href="<?php echo $statesurl ?? "login.php"; ?>"><?php echo $states ?? "登陆";?></a>
  52.         </div>
  53.     </nav>
  54. </body>
  56. </html>

4、登陆注册处理脚本

  1. <?php
  3. // 连接数库所需参数
  4. $dsn="mysql:host=php.edu;dbname=php.edu;charset=utf8;port=3306";
  6. $db=new PDO($dsn,'phpedu','123456');
  7. // var_dump($db);
  8.  $action=filter_input(INPUT_GET,'action',FILTER_SANITIZE_STRING);
  9.  $action=strtolower($action);
  11. switch($action){
  13.     case 'select':
  14.         // 获取查询条件
  15.         // echo $_POST['username'];
  16.         $user=filter_input(INPUT_POST,'username',FILTER_SANITIZE_EMAIL);
  17.         $user=trim($user);
  18.         // echo $user;
  19.         // 准备sql语句
  20.         $sql="select `id`,`password`,`name` FROM `users` WHERE `email`='{$user}'";
  21.         // 预处理sql语句
  22.         $stmt=$db->prepare($sql);
  23.         // var_dump($stmt);
  24.         $stmt->execute();
  26.         $res=$stmt->fetch(PDO::FETCH_ASSOC);
  27.         $password=filter_input(INPUT_POST,'p2',FILTER_SANITIZE_STRING);
  28.         // echo md5($password),'<br>',$res['password'];
  29.         if(md5($password)===$res['password']){
  30.             setcookie('user',serialize($res),time()+7200);
  31.             exit('<script>alert("登陆成功！");location.href="index.php";</script>');
  32.         }else{
  33.             exit('<script>alert("密码账号错误！");location.herf="login.php";</script>');
  34.         }
  36.         // echo md5('12345678');
  37.         // printf("<pre>%s</pre>",print_r($res,true));
  38.     break;
  39.     case 'logout':
  40.         setcookie('user',null,time()-3600);
  41.         exit('<script>alert("登处成功！");location.href="index.php";</script>');
  42.     break;
  43.     case 'insert':
  44.         $arg=[
  45.             'username'=>FILTER_SANITIZE_EMAIL,
  46.             'p1'=>FILTER_SANITIZE_STRING,
  47.             'name'=>FILTER_SANITIZE_STRING,
  48.             'p2'=>FILTER_SANITIZE_STRING
  49.             ];
  50.         $user=filter_input_array(INPUT_POST,$arg);
  52.         if($user['p1']!==$user['p2']){
  53.             exit('<script>alert("密码不一致！");location.href="regist.php";</script>');
  54.         }
  55.         $user['p1']=md5($user['p1']);
  56.         $data=array_values($user);
  57.         array_pop($data);
  58.         array_push($data,time());
  59.         $sql="insert `users` SET `email`='{$data[0]}',`password`='{$data[1]}',`name`='{$data[2]}',`datetime`={$data[3]}";
  60.         // 处理用户数据符合写入数据库要求
  63.         // printf("<pre>%s</pre>",print_r($data,true));
  64.         // 预处理sql语句;
  65.         $stmt=$db->prepare($sql);
  66.         // var_dump($stmt);
  67.         $stmt->execute();
  68.         if($stmt->rowCount()===1){
  69.             setcookie('user',serialize($user),time()+3600);
  70.             exit('<script>alert("登陆成功!");location.href="index.php";</script>');
  71.         }    
  72.     break;
  73.     default:
  74.     exit('<script>alert("未知错误!");location.href="index.php";</script>');
  75. }
  77. $db=null;

5、运行结果


二、SESSION形式(每一次对session处理都必须开启会话)；

  1. session_start();//开启会话
  2. $_SESSION['user']=$user;//把用户信息写入session
  3. if(isset($_SESSION['user'])){
  4. //判断是否登陆，并作出处理
  5. }
  6. //登出操作
  7. session_distroy();

总结：

1、重点数据库连接：PDO连接、select、insert;
2、filter_input(INPUT_GET|INPUT_POST,”获取的值的name属性”，过滤类型);
3、cookie相关知识点：
（1）、setcookie(‘name’,’值信息’,’失效时间’);
（2）、读取cookie信息：$_COOKIE[‘变量名’];
（3）、删除cookie信息：setcookie(‘name’,null,time()-1);
4、session相关知识点：
（1）、session_start();开启会话，调用session必须先开启会话
（2）、读取session信息：$_SESSION[‘变量名’];
（3）、结束当前会话删除session会话信息：session_destroy();
unset($_SESSION[‘’]);注销单个会话
5、serialize()和unserialize()：序列化和发序列化；

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