PHP会话控制/简单的登录注册功能

• 效果演示
  没时间美化登录注册界面下次在美化 其他部分代码比较多 就把控制器的代码拿出来了
  
• 代码部分
• heand.php

<?php
//链接数据库文件
require 'config/catenate.php';

//开启会话
session_start();

//查询用户数据

$stmt = $db->prepare('SELECT * FROM `user`;');
if ($stmt->execute()) {
    $users = $stmt->fetchAll(PDO::FETCH_ASSOC);
} else {
    print_r($stmt->errorInfo());
}


//判断请求类型

$action = strtolower($_GET['action']);

// print_r($action);
switch ($action) {
        //登录
    case 'login':
        //判断是否为POST请求
        if ($_SERVER['REQUEST_METHOD'] === 'POST') {

            //获取用户登录传进的数据
            $email = $_POST['email'];
            $password = sha1($_POST['password']);
            //从数据库中进行对比
            $res = array_filter($users, function ($user) use ($email, $password) {
                return  $user['email'] === $email && $user['password'] === $password;
            });
            if (count($res) === 1) {
                //写入session
                $_SESSION['user'] = serialize(array_pop($res));
                exit('<script>alert("登录成功");location.href="index.php";</script>');
            } else {
                exit('<script>alert("账户或密码错误,或者还没有帐号");location.href="login.php";</script>');
            }
        } else {
            die('请求类型错误');
        }

        //注册
    case 'reg':
        if ($_SERVER['REQUEST_METHOD'] === 'POST') {
            //获取用户注册传进的数据
            $name = $_POST['name'];
            $email = $_POST['email'];
            $password = sha1($_POST['p1']);
            $reg_time = time();
            // 将数据写入数据库
            // $sql = "INSERT `info` SET `biaoti`=:biaoti, `neirong` = :neirong, `time`= :sjtime ";
            $sql = <<<SQL
                INSERT `user`
                SET `name`= ?,
                `email` = ?,
                `password` = ?,
                `reg_time` = ?
            SQL;
            $stmt = $db->prepare($sql);
            $data = [$name, $email, $password, $reg_time];
            $stmt->execute($data);
            if ($stmt->rowCount() === 1) {
                $sql = 'SELECT * FROM `user` WHERE `id` = ' . $db->lastInsertId();
                $stmt = $db->prepare($sql);
                $stmt->execute();
                $newUser = $stmt->fetch(PDO::FETCH_ASSOC);
                $_SESSION['user'] = serialize($newUser);
                exit('<script>alert("注册成功");location.assign("index.php")</script>');
            } else {
                exit('<script>alert("注册失败");location.assign("login.php")</script>');
            }
        }

        //退出
    case 'logout':
        if (isset($_SESSION['user'])) {
            session_destroy();
            exit('<script>alert("退出成功");location.assign("index.php")</script>');
        }
    default:
        exit('未定义的操作');
}