注册、登陆、退出请求分发器实例代码

  1. <?php
  2. session_start();
  3. // 后端可接受前端传过来的参数
  4. $name = isset($_POST['username']) ? $_POST['username'] : null;
  5. $pwd = isset($_POST['password']) ? $_POST['password'] : null;
  6. $pwd2 = isset($_POST['password2']) ? $_POST['password2'] : null;
  8. $action = isset($_POST['action']) ? $_POST['action'] : null;
  9. if ($action == ''){
  10.     $action = isset($_GET['action']) ? $_GET['action'] : null;
  11. }
  13. // 1.连接数据库
  14. $config = require_once __DIR__ .DIRECTORY_SEPARATOR .'connect.php';
  16. // var_dump($config);
  18. // pdo预处理接入
  19. // 准备一条预处理sql语句
  20. $sql = "SELECT `username`,`password` FROM `users` WHERE `username`= ?;";
  22. // 准备要执行的语句，并返回语句对象
  23. $stmt = $pdo->prepare($sql);
  24. // 绑定参数到指定的变量名
  25. $para = [$name];
  27. // 执行一条预处理语句
  28. $stmt->execute($para);
  30. $res = $stmt->fetch(PDO::FETCH_ASSOC);
  32. // echo '<pre>';
  33. // print_r($res);
  34. switch ($action){
  35.     case 'login':
  36.         if(empty($res)){
  37.             echo json_encode(array('code'=>2, 'msg'=>'用户名不存在。'));
  38.         }else{
  39.             if(password_verify($pwd, $res['password'])){
  40.                 echo json_encode(array('code'=>1, 'msg'=>'登录成功'));
  41.                 $_SESSION['username'] = $res['username'];
  42.                 return true;
  43.             }else {
  44.                 echo json_encode(array('code'=>2, 'msg'=>'用户名或密码不正确。'));
  45.             }
  46.         }
  47.     break;
  49.     case 'register':
  50.         if(!empty($res)){
  51.             echo json_encode(array('code'=>2, 'msg'=>'用户名已存在。'));
  52.         }else{
  53.             if($pwd == $pwd2){
  54.                 $pwd = password_hash ($pwd,PASSWORD_DEFAULT );
  56.                 $sql = "INSERT INTO `users` (`username`, `password`) VALUES (?, ?);";
  57.                 $stmt = $pdo->prepare($sql);
  58.                 // 绑定参数到指定的变量名
  59.                 $para = [$name,$pwd];
  61.                 // 执行一条预处理语句
  62.                 $stmt->execute($para);
  63.                 $insert_id = $pdo->lastInsertId();
  65.                 if($insert_id){
  66.                     echo json_encode(array('code'=>1, 'msg'=>'登录成功'));
  67.                 }else {
  68.                     echo json_encode(array('code'=>2, 'msg'=>'用户名或密码不正确。'));}
  69.             }else{
  70.                 echo json_encode(array('code'=>2, 'msg'=>'两次输入密码不一致。'));
  71.             };
  72.         };
  73.     break;
  75.     case 'logout':
  76.         session_destroy();
  77.         echo json_encode(array('code'=>1, 'msg'=>'退出成功。'));
  78.     break;
  79. }

演示网址：[http://help10086.cn/0121/login.php]