PHPz批改状态：合格
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// cookie：再客户端(浏览器)保存用户信息// 第一次访问一个php脚本文件// 那么这个php可以通过一个函数来给客户端设置cookie// 服务器识别用户，是通过用户使用的终端/浏览器来识别// 开启一个会话// session_start();/*** 执行两个动作* 1、浏览器：PHPSESSID，基于cookie* 2、服务器：创建一个与PHPSESSID同名的会话文件*/// $_SESSION['email'] = 'admin@php.cn';// $_SESSION['password'] = md5(md5('123456').'php.cn888');// $_SESSION = [];// 直接将服务器上的会话文件删除// session_destroy();
<!DOCTYPE html><html lang="en"><?phpsession_start(); //开启一个会话// 判断用户是否已经登录if(isset($_SESSION['user'])){// unserialize()函数需要处理序列化之后的字符串,然后将其反序列化为php的值$user = unserialize($_SESSION['user']);}?><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>session</title></head><body><nav><?php if(isset($user)) : ?><a href="" id="logout">退出</a><?php else : ?><a href="login.php">登录</a><?php endif ?></nav><script>document.querySelector('#logout').addEventListener('click', function(event) {if (confirm('是否退出?')) {// 禁用默认跳转行为event.preventDefault();// 跳转到处理器location.assign('handle.php?action=logout');}});</script></body></html>
<!DOCTYPE html><html lang="en"><?phpsession_start();// 判断用户是否已经登录if(isset($_SESSION['user'])){echo '<script>alert("不要重复登录");location.href="index.php"</script>';}?><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>登录</title></head><body><form action="handle.php?action=login" method="post"><fieldset><legend>用户登录</legend><p><input type="email" name="email" placeholder="user@email.com" require></p><p><input type="password" name="password" placeholder="不少于6位" require></p><p><button>提交</button></p></fieldset><a href="register.php">如果没有账号，请先注册</a></form></body></html>
<!DOCTYPE html><html lang="en"><?phpsession_start();// 判断用户是否已经登录if(isset($_SESSION['user'])){echo '<script>alert("不要重复登录");location.href="index.php"</script>';}?><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=], initial-scale=1.0"><title>注册</title></head><body><form action="handle.php?action=register" method="post"><fieldset><legend>用户注册</legend><p><input type="text" name="name" placeholder="请输入" require></p><p><input type="email" name="email" placeholder="user@email.com" require></p><p><input type="password" name="password" placeholder="不少于6位" require></p><p><button>提交</button></p></fieldset></form></body></html>
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