1 登录页面：login.php
<?php //判断一下是否有cookie if (isset($_COOKIE['user']) && $_COOKIE['user']==='admin') { echo '您已经登录'; echo "<a href='logout.php'>注销登录</a>"; exit(); } //登录逻辑 if (isset($_POST['submit'])) { //判断用户名和密码是否正确 if ( isset($_POST['user']) && isset($_POST['pwd']) && $_POST['user']==='admin' && $_POST['pwd'] === 'admin') { //写入cookie if (setcookie('user',$_POST['user'],time()+3600)) { //设置cookie成功 跳转到首页 header('Location:skip.php?url=index.php&info=000登录成功'); } else { echo 'cookie设置失败'; } } else { header('Location:skip.php?url=index.php&info=登录失败'); } } ?> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>登录页面</title> </head> <body> <form method="post" action="login.php"> 姓名：<input type="text" name="user"/> 密码：<input type="password" name="pwd" /> <input type="submit" name="submit" value="登录"> </form> </body> </html>
2 首页 index.php
<?php if (isset($_COOKIE['user']) && $_COOKIE['user'] === 'admin') { echo "亲爱的{$_COOKIE['user']}你好,欢迎回来"; echo "<br><a href='logout.php'>注销登录</a>"; } else { echo "<a href='login.php'>请登录</a>"; }
3 跳转中转页 skip.php
<?php //跳转中转页 if (!isset($_GET['url']) || !isset($_GET['info'])) { exit('url 或 info 没有收到'); } ?> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>桥页</title> <meta http-equiv="refresh" content="3;url=<?php echo $_GET['url'] ?>"> </head> <body> <div style="text-align:center;font-size:20px;"><?php echo $_GET['info'] ?>，3秒后自动跳转！</div> </body> </html>
4 注销登录 logout.php
<?php //如果cookie存在 我们进行删除 if (isset($_COOKIE['user']) && $_COOKIE['user'] === 'admin') { //删除cookie操作 if (setcookie('user',$_POST['user'],time()+3600)) { //跳转到登录页 header('Location:login.php'); } else { echo '删除失败 请重试'; } }