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Teacher's comments：完成的不错。pdo操作(手写)，应该多写点pdo的方法。继续努力
Collection
Collection
11月22日作业:
验证
首页文件：index.php
<?php
//开启会话
session_start();
// 为简化程序, 使用了一个中间层: 请求派发器,类似于框架的控制器, 对用户的请求进行集中处理
// 1: 已登录: 显示出用户的登录信息, 显示退出按钮if (isset($_SESSION['name']) && $_SESSION['name'] === 'admin') {echo '用户: ' . $_SESSION['name'] . '已登录<br>';echo '<a href="dispatch.php?action=logout">退出</a>';} else {// 2. 未登录,就跳转到登录页面echo '<a href="dispatch.php?action=login">请登录</a>';}
派发器：dispatch.php
<?php
// 只需要在该脚本中打开会话即可, check.php/logout.php/login.php都是由它调用的, 不必重复开启
session_start();
// 连接数据库
require DIR . ‘/connect.php’;
// 获取请求参数
$action = isset($_GET[‘action’]) ? $_GET[‘action’] : ‘login’;
$action = htmlentities(strtolower(trim($action)));
// 请求分发
switch ($action) {
// 1. 登录页面
case ‘login’:
// 加载登录表单
include DIR . ‘/login.php’;
break;
// 2. 验证登录case 'check':include __DIR__ . '/check.php';break;// 3. 退出登录case 'logout':include __DIR__ . '/logout.php';break;// 默认操作default:header('Location: index.php');echo '<script>location.assign("index.php");</script>';
}
登陆页面：login.php
<?php
// 防止用户重复登录
if (isset($_SESSION[‘name’])) {
echo ‘<script>alert(“不要重复登录”);location.assign(“index.php”);</script>‘;
}
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>用户登录</title>
</head>
<body>
<h3>用户登录</h3>
<form action="dispatch.php?action=check" method="post" onsubmit="return isEmpty();">
<p>
<label for="phone">手机:</label>
<input type="phone" name="phone" id="phone">
</p>
<p><label for="password">密码:</label><input type="password" name="password" id="password"></p><p><button>提交</button></p></form><script>function isEmpty() {var phone = document.getElementById('phone').value;var password = document.getElementById('password').value;if (phone.length=== 0 || password.length===0) {alert('手机和密码不能为空');return false;}}</script></body>
</html>
验证登陆：check.php
<?php
// 1.判断用户的请求类型是否正确?
if ($_SERVER[‘REQUEST_METHOD’] === ‘POST’) {
// 2.获取表单数据
$phone = $_POST[‘phone’];
$password = sha1($_POST[‘password’]);
// 3. 用用户表user.dbf进行验证$sql = 'SELECT * FROM `user` WHERE `phone` = :phone AND `password` = :password LIMIT 1';$stmt = $pdo->prepare($sql);$stmt->execute(['phone'=>$phone, 'password'=>$password]);$user = $stmt->fetch(PDO::FETCH_ASSOC);// 4. 判断验证的结果if (false === $user) {// 验证失败,返回上一下页面echo '<script>alert("验证失败");history.back();</script>';die;}// 验证成功，将用户的信息写到session$_SESSION['name'] = $user['name'];echo '<script>alert("登录成功");location.assign("index.php");</script>';exit;
} else {
die(‘请求类型错误’);
}
退出登陆：logout.php
<?php
// 必须在用户已经登录的情况下再退出
if (isset($_SESSION[‘name’])) {
session_destroy();
echo ‘<script>alert(“退出成功”);location.assign(“index.php”);</script>‘;
} else {
// 要求用户先登录
echo ‘<script>alert(“请先登录”);location.assign(“login.php”);</script>‘;
}
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