会话未销毁 [英] session is not destroyed

问题描述

我有这个文件

secure.php

secure.php

session_start();
if(empty($_SESSION['u_name'])) {
    header("Location:emprego.php");
}

if(isset($_GET['logout'])) {
    session_destroy();
    header("Location:emprego.php");
}

$name = $_SESSION['u_name'];

?>

<li><?php echo "<a href='emprego.php?logout' id='D'>Logout</a>";?></li>

基本上，如果我注销，我将被重定向到emprego.php.但是，如果我单击后页按钮(浏览器中的箭头)，则可以查看同一页面(secure.php).

basically, if i do logout, i will be redirected to emprego.php. But if i click in back page button (arrow in browser), i can view the same page (secure.php).

我的问题是，为什么?

谢谢

推荐答案

http://nl2.php.net/manual/en/function.session-destroy.php

在这里看看示例1.它明确指出您还必须清除$ _SESSION.

Take a look at example 1 here. It clearly states that you have to clear $_SESSION as well.

if(isset($_GET['logout'])) {
    unset($_SESSION['u_name']); //makes it non-existent (it does unset) that variable
    session_destroy();
    header("Location:emprego.php");
}

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