当按下返回按钮时，如何使Firefox重新加载页面？ [英] How do I make Firefox reload page when back button is pressed?
问题描述
我试过了所有这些。 。
< meta http-equiv =Cache-Controlcontent =no-store/>
< meta http-equiv =Pragmacontent =no-cache/>
< meta http-equiv =Expirescontent = - 1/>
< meta http-equiv =Expirescontent =Sat，1 Jan 1 00:00:00 GMT/>
...我也尝试了以下JavaScript ...
< input type =hiddenid =refreshedvalue =no/>
< script type =text / javascript>
onload = function（）{
var e = document.getElementById（刷新）;
if（e.value ==no）{
e.value =yes;
}
else {
e.value =no;
location.reload（）;
}
}
< / script>
...一切都无济于事。我在这里错过了什么？如果有问题的话，页面将由PHP生成。
更新1：
到目前为止已经尝试了所有的建议，但我仍然无法得到这个工作。当我使用克里斯的PHP代码，我使用它像这样...
<？php
header -Control：no-store，no-cache，must-revalidate，max-age = 0）;
header（Expires：Sat，26 Jul 1997 05:00:00 GMT）;
？>
<！DOCTYPE html PUBLIC - // W3C // DTD XHTML 1.0 Transitional // ENhttp://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">
< html dir =ltrxmlns =http://www.w3.org/1999/xhtml>
<！ - 我的其余页面 - >
..正如您所看到的，它位于网页的EXTREME顶部， 我也尝试过使用 已解决！ 原来我有多个问题对我不利，但通过尽职调查，我能够消除这些问题并获得胜利。 在Chris将他的代码更新为... 我发现他的代码在我使用它的时候的确如此，除此之外，但是当我把它放进我的页面时，它不起作用。我的所有页面都是 作为
$ b session_start（）但即使阅读手册后，我不确定我是否正确使用。我正在把它放在我的页面的顶部。
我对任何建议都是开放的，它使得这个工作不会破坏其他页面功能。我知道我已经看到每次重新加载后退按钮的页面，它们是如何操作的！
<？php
header（ Cache-Control：no-store，no-cache，must-revalidate，max-age = 0）;
header（Expires：Sat，26 Jul 1997 05:00:00 GMT）;
echo time（）;
？>< a href =http://google.com> aaaaaaaaaaaaa< / a>
.php 或 .html ，并且都附加到DWT（动态Web模板），所以我用Chris的代码一次性更新了所有的代码。我没有意识到，DWT在 DOCTYPE 标题后面开始，所以代码从未插入到我的页面中。我无法找到使DWT包含 DOCTYPE 标题的方法，所以我进入了所有的页面，并手动在 DOCTYPE .htm 和 .php .html 页面生成错误在我已经插入克里斯的代码说什么的效果，不能修改标题，头已经发送的地方。我并不关心我的扩展是什么，所以我只是将所有的 .html 扩展名改为 .php 扩展名。
最后一个小问题是，即使页面没有被缓存（就像我想的那样），Firefox会把用户放在上一页的最后一个位置他们使用后退按钮（即，如果用户在页面a的底部，当他们导航到页面b时，则用户使用页面b上的后退按钮，他们将被返回到页面a的底部，而不是页面的顶部根据需要）。修剪下我原来的JavaScript修正了这个问题...
< script type =text / javascript>
onload = function（）{
document.getElementById（'content'）。scrollTop = 0;
}
< / script>
虽然这个问题似乎非常复杂，但我很高兴这个问题已经解决了。感谢您的帮助，每个人（特别是克里斯）。
这适用于我
创建一个新的php文件。
<？php
header（ Cache-Control：no-store，no-cache，must-revalidate，max-age = 0）;
header（Expires：Sat，26 Jul 1997 05:00:00 GMT）;
echo time（）;
？>< a href =http://google.com> aaaaaaaaaaaaa< / a>
I have tried every combination and permutation of meta tags that are supposed to stop a page from being cached, but Firefox STILL caches the page! I just need the URL to reload when a user presses the back button. Works fine in IE8.
I have tried all of these...
<meta http-equiv="Cache-Control" content="no-store" />
<meta http-equiv="Pragma" content="no-cache"/>
<meta http-equiv="Expires" content="-1"/>
<meta http-equiv="Expires" content="Sat, 1 Jan 2000 00:00:00 GMT" />
...and I have also tried the following JavaScript...
<input type="hidden" id="refreshed" value="no"/>
<script type="text/javascript">
onload=function(){
var e=document.getElementById("refreshed");
if(e.value=="no"){
e.value="yes";
}
else{
e.value="no";
location.reload();
}
}
</script>
... all to no avail. What am I missing here? Pages are generated with PHP if that matters.
UPDATE 1:
I have tried every suggestion thus far but I still cannot get this to work. When I use Chris's PHP code I use it like this...
<?php
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html dir="ltr" xmlns="http://www.w3.org/1999/xhtml">
<!--the rest of my page-->
.. and as you can see it is at the EXTREME top of my webpage, before the DOCTYPE header.
I have also experimented with session_start() but even after reading the manual I am not sure I am using it right. I was putting it right at the very top of my page as well.
I am open to ANY SUGGESTIONS that make this work without breaking other page functionality. I know I have seen pages that reload EVERY TIME the back button is used, HOW ARE THEY DOING IT?!
SOLVED!
Turns out I had multiple issues working against me, but through due diligence I was able to eliminate those issues and emerge victorious.
After Chris updated his code to...
<?php
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");
echo time();
?><a href="http://google.com">aaaaaaaaaaaaa</a>
I found that his code did indeed work when I used it EXACTLY how he had it with NOTHING else, but when I put it into my pages it didn't work. All of my pages are either .php or .html and all are attached to a DWT (Dynamic Web Template), so I was updating all of them at once with Chris's code. What I didn't realize was that the DWT starts RIGHT AFTER the DOCTYPE header, so the code was never inserted into my pages. I could find no way to make the DWT include the DOCTYPE header so I went into all my pages and manually inserted the code above the DOCTYPE header.
Next I found that even though my server is set to parse .htm and .html as .php the .html pages were generating an error at the very where I had inserted Chris's code saying something to the effect of "cannot modify headers, headers have already been sent". I didn't really care what my extensions were so I just changed all my .html extensions to .php extensions.
A final minor annoyance was that even though the page was now not being cached (just like I wanted) Firefox was placing the user at their last location on the previous page when they used the back button (i.e. if a user was at the bottom of page a when they navigated to page b, then the user used the back button on page b they would be returned to the bottom of page a, not the top of page a as desired). Trimming down my original JavaScript fixed this...
<script type="text/javascript">
onload=function(){
document.getElementById('content').scrollTop=0;
}
</script>
Even though this seems very involved for such a simple problem I am glad it is fixed. Thanks for your help everyone (especially Chris).
This works for me
make a new php file. I can use the back and forward buttons and the number on the page always updates
<?php
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");
echo time();
?><a href="http://google.com">aaaaaaaaaaaaa</a>
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