logout.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN">
<head>
<title>注销页面</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body>
<?php
session_start();
if(empty($_SESSION['username'])){
header("http://127.0.0.1/sunyan2015/013/login.php");
}else{
$_SESSION=array();
session_destroy();
setcookie('phpsessid','',time()-3600);
}
echo'你已经注销成功';
?>
<br />
<a href="login.php">登录</a>
<br />
<a href="index.php">返回首页</a>
</body>
</html>
