php 退出按钮php
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Logout button php
提问by crusader1223
I have this code and need the code to add a logout button, can anyone write out the code for a log out button that will log out the user, I read something about destroy session but do not know how to write the code out, thank you!
我有这个代码并且需要代码来添加一个注销按钮，任何人都可以写出一个注销按钮的代码来注销用户，我读了一些关于销毁会话但不知道如何写出代码的内容，谢谢你！
<?php
include 'connection.php';
//start of checking if user is logged in code
if (!valid_credentials) {
header('Location: login.php');
exit();
}
$_SESSION['user'] = 'username';
if (!isset($_SESSION['user'])) {
header('Location: login.php');
exit();
}
//end of logged in code and starting a session
$query = "SELECT * FROM people";
$result = mysql_query($query);
While($person = mysql_fetch_array($result)) {
echo "<h3>" . $person['Name'] . "</h3>";
echo "<p>" . $person['Description'] . "</p>";
echo "<a href=\"modify.php?id=" . $person['ID']. "\">Modify User</a>";
echo "<span> </span>";
echo "<a href=\"delete.php?id=" . $person['ID']. "\">Delete User</a>";
}
?>
<h1>Create a User</h1>
<form action="create.php" method="post">
Name<input type ="text" name="inputName" value="" /><br />
Description<input type ="text" name="inputDesc" value="" />
<br />
<input type="submit" name="submit" />
</form>
回答by asprin
Instead of a button, put a link and navigate it to another page
而不是按钮，放置一个链接并将其导航到另一个页面
<a href="logout.php">Logout</a>
Then in logout.phppage, use
然后在logout.php页面中，使用
session_start();
session_destroy();
header('Location: login.php');
exit;
回答by Mic1780
When you want to destroy a session completely, you need to do more then just
当您想完全销毁会话时，您需要做的不仅仅是
session_destroy();
First, you should unset any session variables. Then you should destroy the session followed by closing the write of the session. This can be done by the following:
首先，您应该取消设置任何会话变量。然后你应该销毁会话，然后关闭会话的写入。这可以通过以下方式完成：
<?php
session_start();
unset($_SESSION);
session_destroy();
session_write_close();
header('Location: /');
die;
?>
The reason you want have a separate script for a logout is so that you do not accidently execute it on the page. So make a link to your logout script, then the header will redirect to the root of your site.
您需要一个单独的注销脚本的原因是，您不会意外地在页面上执行它。因此，创建一个指向您的注销脚本的链接，然后标题将重定向到您站点的根目录。
Edit:
编辑：
You need to remove the () from your exit code near the top of your script. it should just be
您需要从脚本顶部附近的退出代码中删除 ()。它应该只是
exit;
