php 重定向后PHP获取上一页网址
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PHP get previous page url after redirect
提问by Gadgetster
I want to have a navigation bar that tells the user where they just came from. Example: Homepage -> Post
我想要一个导航栏，告诉用户他们刚刚来自哪里。示例：主页 -> 发布
But if they are in their posts manager and click on a post, I want it to say Posts manager -> Post
但是如果他们在他们的帖子管理器中并点击一个帖子，我希望它说帖子管理器 - > 帖子
I read that $_SERVER['HTTP_REFERER']is not good enough to get the full url so that's not useful as I want the navigation bar all clickable
我读到这$_SERVER['HTTP_REFERER']不足以获得完整的网址，所以这没有用，因为我希望导航栏全部可点击
Any help is much appreciated!
任何帮助深表感谢！
回答by Wintermute
I believe what you want is called breadcrumbs.
我相信你想要的是面包屑。
What to use for navigation chain storage is actually up to you. You might use even $_SERVER['HTTP_REFERER'] if you want, but that'd be unreliable as it's client-side. Usual way to store such chain is actual URI or session.
导航链存储使用什么实际上取决于您。如果您愿意，您甚至可以使用 $_SERVER['HTTP_REFERER'] ，但这不可靠，因为它是客户端。存储这种链的通常方法是实际的 URI 或会话。
For example, you have such URI: http://www.example.com/post_manager/post
例如，您有这样的 URI：http: //www.example.com/post_manager/post
Then you can iterate through explode("/", $_SERVER["REQUEST_URI"])to get each step.
然后您可以迭代explode("/", $_SERVER["REQUEST_URI"])以获取每一步。
That's basic explanation to guide you to a right direction. You can google alot of samples and snippets using keyword breadcrumbs.
这是引导您走向正确方向的基本解释。您可以使用关键字 google 搜索大量示例和片段breadcrumbs。
On the topic of saving last visited location (the way to determine wether abonent came from manager or homepage): you can use session's variables to do that. Here's an example:
关于保存上次访问位置的主题（确定是否来自管理器或主页的方式）：您可以使用会话的变量来做到这一点。下面是一个例子：
This way you can set a variable on your homepage:
这样你就可以在你的主页上设置一个变量：
<?php
session_start();
$_SESSION['previous_location'] = 'homepage';
?>
And then you just access it from another page:
然后你只需从另一个页面访问它：
<?php
$previous_location = $_SESSION['previous_location'];
?>
It's important to set session.save_pathin your PHP configuration file or your sessions might get lost.
在 PHP 配置文件中设置session.save_path很重要，否则会话可能会丢失。
回答by Triad
You could do it on the client side if you use the Javascript document.referrerproperty. However, a better solution may be to use the global session array.
如果您使用 Javascript document.referrer属性，则可以在客户端执行此操作。但是，更好的解决方案可能是使用全局会话数组。
if (!isset($_SESSION['referrer'])) {
$_SESSION['referrer'] = $current_uri;
} else {
$previous_uri = $_SESSION['referrer'];
$_SESSION['referrer'] = $current_uri;
}
回答by Steve Horvath
The best solution IMO is to save the location into session, every time the user goes to a 'meaningful' page (that you want to be able to navigate back to via this feature), then simply use this array of, say, last 2 visited pages to pull up all the information. Simple and effective.
IMO 的最佳解决方案是将位置保存到会话中，每次用户转到“有意义的”页面（您希望能够通过此功能导航回）时，然后只需使用此数组，例如，最后 2访问过的页面以提取所有信息。简单有效。
回答by DevWL
<?php
session_start();
$_SESSION['user_interactions'][] = $_SERVER['HTTP_REFERER'];
// get previous
$previous_page = end($_SESSION['user_interactions']);
// list all user interactions
foreach($_SESSION['user_interactions'] as $key => $value){
echo $value;
if(count($_SESSION['user_interactions'])-1 != $key) echo ">";
}
?>
