PHP ?? ?? ???? ???? - ??
??? ?? ? main.php ???? ???? ?? ???? ?????
?? top.php ???? ???????
<?php
session_start();
?>
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8">
<style type="text/css">
body{margin-top:50px;text-align:center;}
a{text-decoration:none;float:right;margin-right:15px;color:red;}
</style>
</head>
<body>
<h1>合肥領(lǐng)航環(huán)保科技公司后臺管理系統(tǒng)</h1>
<?php
if(!empty($_SESSION['username'])){
?>
<a href="loginout.php?act=loginout" target="_top">退出</a>
<?php
}
?>
</body>
</html>?? ?? ???? ???? ?? ??? ??? ???. ?? ??? ??? ??????. ??? ? ????? ??? ??? ??? ?? ??? ?????
?? ???? ??? ?????
? ??? ???????. ?? ?? ??
???? loginout.php? ??
?? ??? ??????? ：
<?php
session_start();
if($_GET['act'] == 'loginout') {
unset($_SESSION);
echo "<script>location.href='log.php';</script>";
}
?>
??? ?? ?? ??? ??????.
