登入界面
<?php
session_start();
header('Content-type:text/html;charset=utf-8');
if(isset($_SESSION['username']) && $_SESSION['username']==='zeng'){
exit('您已經登入了，請不要重新登入');
}
if(isset($_POST['submit'])){
if(isset($_POST['username']) && isset($_POST['password']) && $_POST['username']=='zeng' && $_POST['password']=='123456' ){
$_SESSION['username']=$_POST['username'];
header('location:skip.php?url=index.php&info=登入成功！3秒后跳轉到首面');
} else {
header('location:skip.php?url=login.php&info=對不起，用戶名活密碼填寫錯誤！3秒后跳轉到登入頁面');
}
}
?>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<title>請登入</title>
</head>
<body>
<form method="post" action="">
姓名：<input type="text" name="username" />
密碼：<input type="password" name="password"/>
<input type="submit" name="submit" value="登入"/>
</form>
</body>
</html>
跳轉處理頁面skip.php
<?php
if(!isset($_GET['url']) || !isset($_GET['info'])){ exit(); } ?> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta http-equiv="refresh" content="3,URL=<?php echo $_GET['url'] ?>"/> <title>正在跳轉中...</title> </head> <body> <div><?php echo $_GET['info'] ?></div> </body> </html>
登入首頁index.php
<?php
session_start();
header('Content-type:text/html;charset=utf-8');
if(isset($_SESSION['username']) && $_SESSION['username']==='zeng'){
echo "您好！{$_SESSION['username']},歡迎回來！";
echo "<a href='logout.php'>注銷</a>";
} else {
echo "<a href='login.php'>請登入</a>";
}
?>
注銷處理界面logout.php
<?php
session_start();
header('Content-type:text/html;charset=utf-8');
if(isset($_SESSION['username']) && $_SESSION['username']==='zeng'){
session_unset();//free all session variable
session_destroy();//銷毀一個會話中的全部數據
setcookie(session_name(),'',time()-3600);//銷毀與客戶端的卡號
header('location:skip.php?url=index.php&info=注銷成功，正在跳轉！');
}else{
header('location:skip.php?url=index.php&info=注銷失敗，請稍后重試！');
}
?>