我有一个案例，我将在线拍摄客户端的照片，如果照片被更改，就需要更新div。浏览器仍然显示着旧照片。因此，我使用了调用随机GET变量的方法，该变量每次都是唯一的。这就是它，如果它能帮助到任何人的话

<img src="/photos/userid_73.jpg?random=<?php echo rand() ?>" ...

编辑 正如其他人指出的那样，下面是更有效的解决方案，因为它只会在图像被更改时重新加载图像，通过文件大小识别这种更改:

<img src="/photos/userid_73.jpg?modified=<? filemtime("/photos/userid_73.jpg")?>"

除了设置Cache-control: no-cache，如果你想每次刷新本地副本，你还应该将Expires头设置为-1(某些版本的IE似乎需要这样做)。

查看HTTP缓存-与服务器检查，始终发送If-Modified-Since

更新URL为以下工作为我:

/ custom.js吗?id = 1

通过在?id=后添加一个唯一的数字，并随着新的变化而递增，用户不必按CTRL + F5来刷新缓存。或者，您可以在?id=后附加当前时间或Epoch的哈希或字符串版本

id=1520606295

我有同样的问题，我所做的就是改变文件名链接到我的index.html文件，然后进入index.html文件，更新他们的名字，不是最好的做法，但如果它工作。浏览器将它们视为新文件，因此它们会被重新下载到用户的设备上。

例子: 我想更新一个css文件，它的命名为styles.css，把它改成styles.css

进入index。html进行更新，并将其更改为

您是想清除缓存，还是只是确保当前(已更改的?)页面没有缓存?

如果是后者，那就应该如此简单

<META HTTP-EQUIV="Pragma" CONTENT="no-cache">

强制浏览器清除缓存或重新加载正确的数据?我已经尝试了stackoverflow中描述的大多数解决方案，一些工作，但过了一会儿，它最终缓存并显示先前加载的脚本或文件。是否有另一种方法，将清除缓存(css, js等)，并实际工作在所有浏览器?

I found so far that specific resources can be reloaded individually if you change the date and time on your files on the server. "Clearing cache" is not as easy as it should be. Instead of clearing cache on my browsers, I realized that "touching" the server files cached will actually change the date and time of the source file cached on the server (Tested on Edge, Chrome and Firefox) and most browsers will automatically download the most current fresh copy of whats on your server (code, graphics any multimedia too). I suggest you just copy the most current scripts on the server and "do the touch thing" solution before your program runs, so it will change the date of all your problem files to a most current date and time, then it downloads a fresh copy to your browser:

<?php
   touch('/www/sample/file1.css');
   touch('/www/sample/file2.js');
?>

然后……剩下的程序…

It took me some time to resolve this issue (as many browsers act differently to different commands, but they all check time of files and compare to your downloaded copy in your browser, if different date and time, will do the refresh), If you can't go the supposed right way, there is always another usable and better solution to it. Best Regards and happy camping. By the way touch(); or alternatives work in many programming languages inclusive in javascript bash sh php and you can include or call them in html.