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pdo增删查改，session登陆验证

张浩刚
张浩刚原创
2019年11月26日 14:26:46843浏览

session登陆验证

index.php

  1. <?php
  2. session_start();
  3. if(isset($_SESSION['name'])){
  4.     echo $_SESSION['name'] . '欢迎您 ';
  5.     echo '<a href="dispatch.php?action=logout">退出</a>';
  6. }else{
  7.     echo '<a href="dispatch.php?action=login">登陆</a>';
  8. }

dispatch.php

  1. <?php
  2. session_start();
  3. include __DIR__ . '/pablic/pdo.php';
  5. $action = $_GET['action'] ?? 'login';
  6. $action = htmlentities(strtolower(trim($action)));
  8. switch($action){
  9.     case 'login' : include __DIR__ . '/pablic/login.php';
  10.     break;
  11.     case 'check' : include __DIR__ . '/pablic/check.php';
  12.     break;
  13.     case 'logout' : include __DIR__ . '/pablic/logout.php';
  14.     break;
  15.     default : include __DIR__ . '../index.php';
  16.     break;
  17. }

pdo.php

  1. <?php
  2. $db = [
  3.     'type' => 'mysql',
  4.     'host' => 'localhost',
  5.     'dbname' => 'film',
  6.     'user' => 'root',
  7.     'password' => 'root'
  8. ];
  9. $dns = $db['type'] . ':host=' . $db['host'] . ';dbname=' . $db['dbname'];
  10. try{
  11.     $pdo = new PDO($dns,$db['user'],$db['password']);
  12. }catch(PDOException $e){
  13.     die('错误原因' . print_r($e -> getMessage(),true));
  14. }

login.php

  1. <?php
  2. if(isset($_SESSION['name'])){
  3.     echo $_SESSION['name'] . '重复登陆啦';
  4. }
  5. ?>
  6. <!DOCTYPE html>
  7. <html lang="en">
  8. <head>
  9.     <meta charset="UTF-8">
  10.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  11.     <meta http-equiv="X-UA-Compatible" content="ie=edge">
  12.     <title>登陆</title>
  13. </head>
  14. <body>
  15.     <h3>立即登陆</h3>
  16.     <form action="../dispatch.php?action=check" method="post">
  17.         <p>
  18.             <label for="tel">账户：<input type="tel" name="tel" id=""></label>
  19.         </p>
  20.         <p>
  21.             <label for="password">密码：<input type="password" name="password" id=""></label>
  22.         </p>
  23.         <p>
  24.             <button>立即登陆</button>
  25.         </p>
  26.     </form>
  27. </body>
  28. </html>

check.php

  1. <?php
  2. if( !empty($_POST['tel']) && !empty(sha1($_POST['password'])) ){
  3.     $tel = $_POST['tel'];
  4.     $password = sha1($_POST['password']);
  6.     $sql = 'SELECT * FROM `user` WHERE `tel`=:tel AND `password`=:password LIMIT 1 ';
  7.     $stmt = $pdo -> prepare($sql);
  8.     $stmt -> execute(['tel'=>$tel, 'password'=>$password]);
  9.     $user = $stmt -> fetch(PDO::FETCH_ASSOC);
  11.     if(empty($user)){
  12.         echo '<script>alert("账户或密码错误");window.history.go(-1)</script>';
  13.     }else{
  14.         $_SESSION['name'] = $user['name'];
  15.         echo '<script>alert("登录成功");location.assign("../index.php");</script>';
  16.         exit;
  17.     }
  18. }else{
  19.     echo '账户密码不能为空';
  20. }

logout.php

  1. <?php
  2. if(isset($_SESSION['name'])){
  3.     session_destroy();
  4.     echo '<script>alert("退出成功");location.assign("../index.php")</script>';
  5. }else{
  6.     echo '<script>alert("请先登陆");location.assign("dispatch.php?action=login.php")</script>';
  7. }

PDO手抄


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