返回到joomla中的上一页 [英] Return to previous page in joomla

问题描述

我创建了自己的扩展。此扩展程序可以从网站的不同组件和部分访问。

我遇到的问题是，可能有多个不同的URL链接到此扩展。我有一个取消按钮，我无法解决如何获得此按钮链接到以前的URL。

想知道是否有一些内置的joomla像getPreviousURL？找不到任何东西。

编辑：我应该说我仍然想要能够运行我的cancel（）方法。例如index.php？option = com_mycomp& task = mycomp.cancel。

解决方案

如果我明白你的问题，这将有助于你肯定。 Joomla不支持像Javascript这样的东西。

JS

 < script& 
 function goBack（）
 {
 window.history.back（）
} 
< / script> 
   
 
 
 
 HTML 
 < input type =buttonvalue =Cancelonclick =goBack（）/> 
 
 
 
 
 
 
 back（）方法加载历史记录列表中的上一个URL。这是
，与点击后退按钮或history.go（-1）相同。
 
 
  >根据需要更新答案。  
 
 
 
 PHP 
 
 
 
一个可能性，你可以使用HTTP_REFERER，清除它，并通过PHP回声。
 <？php 
 $ url = htmlspecialchars（$ _ SERVER ['HTTP_REFERER']）; 
 $ this-> setRedirect（$ url）; 
？> 
  
 
 
 
 
 
如果
 
 
 
 
 
在浏览器地址栏中输入了网站网址。
 
 
通过浏览器维护的书签访问了该网站。
 $ b  
 
安装了安全软件（防病毒/防火墙等），可从所有请求中删除引荐来源网址。
 > 
 
 
 
 
 
 
如果遇到任何问题，请通知我。
 
 
 
更新答案 -  Joomla方法
  $ url = JFactory :: getURI（）; 
 $ request_url = $ url-> toString（）; 
  
 
I have created my own extension. This extension can be accessed from different components and parts of the website.

The problem I have is that there could be a number of different URLs that link to this extension. I have a 'cancel' button and I can't work out how I would get this button to link to the previous URL.

Wondering if there is something built into joomla like getPreviousURL? Couldn't find anything.

EDIT: I should have said that I still want to be able to run my cancel() method. e.g. index.php?option=com_mycomp&task=mycomp.cancel. The cancel() method will then perform a redirection to the previous page.
解决方案
If I understand your question right, This will help you out for sure. Joomla does not support something like that but Javascript does. 

JS
<script>
function goBack()
  {
  window.history.back()
  }
</script>
HTML
<input type="button" value="Cancel" onclick="goBack()" />



  
The back() method loads the previous URL in the history list. This is
  the same as clicking the Back button or history.go(-1).
Updated Answer as required.

PHP

If JavaScript isn't a possibility, you could use the HTTP_REFERER, sanitize it, and echo it out via PHP.
<?php
  $url = htmlspecialchars($_SERVER['HTTP_REFERER']);
  $this->setRedirect($url);
?>



  
This will not work if
  
  

  
entered the site URL in browser address bar itself.
  
visited the site by a browser-maintained bookmark.
  
visited the site as first page in the window/tab.
  
has security software installed (antivirus/firewall/etc) which strips    the referrer from all requests.
  
visited the site programmatically (like, curl) without setting the    referrer header (searchbots!).
  
If you come across any problems let me know.

Update answer - Joomla method
$url = JFactory::getURI();
$request_url = $url->toString();


                        
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