php 重定向 - 替代“<meta http-equiv='refresh' />”？
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Redirects - alternative to "<meta http-equiv='refresh' />"?
提问by Dave
Possible Duplicate:
Best redirect methods?
可能的重复：
最佳重定向方法？
Hello
你好
I am working with some legacy code that includes a module for user registration / login. There is a block that queries the DB to see if the user is logged in, then re-directs to the login page.
我正在使用一些遗留代码，其中包括一个用于用户注册/登录的模块。有一个块可以查询数据库以查看用户是否已登录，然后重定向到登录页面。
The re-direct is handled by <meta http-equiv='refresh' content='=2;index.php' />but I have since learnt this is depreciated, and doesn't work in all browsers.
重定向由处理，<meta http-equiv='refresh' content='=2;index.php' />但我后来了解到这是折旧的，并且不适用于所有浏览器。
Is there an alternative way to put a re-direct within the code below?
有没有其他方法可以在下面的代码中放置重定向？
$username = mysql_real_escape_string($_POST['username']);
$password = md5(mysql_real_escape_string($_POST['password']));
$checklogin = mysql_query("SELECT * FROM users WHERE username = '".$username."' AND password = '".$password."'");
if(mysql_num_rows($checklogin) == 1)
{
$row = mysql_fetch_array($checklogin);
$email = $row['email'];
$_SESSION['username'] = $username;
$_SESSION['email'] = $email;
$_SESSION['LoggedIn'] = 1;
echo "<h1>Success</h1>";
echo "<p>We are now redirecting you</p>";
echo "<meta http-equiv='refresh' content='=2;index.php' />";
}
else
{
echo "<h2>Error</h2>";
echo "<p>Sorry, your account could not be found. Please <a href=\"index.php\">click here to try again</a>.</p>";
}
Many thanks for any pointers.
非常感谢您的指点。
回答by jmz
META refresh is not deprecated. Your refresh tag has an extra =. It should be
META 刷新未弃用。您的刷新标签有一个额外的 =。它应该是
<meta http-equiv='refresh' content='2;index.php' />
You can do a refresh with a header too:
您也可以使用标题进行刷新：
header("Refresh: 2;index.php");
Or use 302 redirection:
或者使用 302 重定向：
header("Location: /index.php");
Or do it in Javascript.
或者用Javascript来做。
And the best method? Use a META refresh tag in the <head>section. Rationale for this is that IE does not save headers when it uses cached version of a page.
最好的方法是什么？在该<head>部分中使用 META 刷新标记。这样做的理由是 IE 在使用页面的缓存版本时不保存标头。
回答by Pekka
You can use header()before any content is sent to the server:
您可以header()在任何内容发送到服务器之前使用：
header("Location: index.php");
die();
this will send the browser a 302response and cause it to open the other page instead.
这将向浏览器发送302响应并使其打开另一个页面。
Always make sure you DO NOT output any content after issuing a `header("Location"). Anything you output will still be sent to the browser!
始终确保在发出 `header("Location") 后不要输出任何内容。您输出的任何内容仍将发送到浏览器！
The easiest way to achieve that is usually issuing a die()after the header("Location:") call.
实现这一目标的最简单方法通常是die()在 header("Location:") 调用之后发出一个。
回答by defines
In addition to the headerfunction mentioned by Pekka, you could alternatively use javascript - this is the behavior intended to replace the meta refresh which has been deprecated.
除了headerPekka 提到的功能之外，您还可以使用 javascript - 这是旨在替换已弃用的元刷新的行为。
<script>top.location = 'index.php';</script>
Simply replace your meta line with the above.
只需将您的元行替换为上述内容即可。
You can even add a timeout as follows:
您甚至可以按如下方式添加超时：
<script>setTimeout('top.location = \'index.php\'', 2000);</script>
The above will wait 2 seconds before redirecting.
以上将在重定向前等待 2 秒。
回答by Stefan Hoth
First of all: Meta is only allowed in the head-section of a HTML-document so putting it out after h1 and p in the body is wrong and won't work at all in most browsers.
首先：Meta 只允许出现在 HTML 文档的 head-section 中，因此将它放在 body 中的 h1 和 p 之后是错误的，并且在大多数浏览器中根本不起作用。
For showing a message for 2 seconds and redirect afterwards you'd have to use javascript, php can't do that for you.
要显示 2 秒钟的消息并在之后重定向，您必须使用 javascript，php 无法为您执行此操作。
Plain javascript would be using setTimeout (value in milliseconds)
普通的 javascript 将使用 setTimeout（以毫秒为单位的值）
setTimeout("location.href = 'index.php';",2000);
If you want to use jQueryyou could use the delay()-function.
回答by Piotr Pankowski
header ("Location: index.php?success=1");
exit;
and in index.php
并在 index.php
if (!empty ($_GET['success'])) {
echo "<h1>Success</h1>";
}
