文件版本控制可以消除浏览器缓存问题(File versioning to eliminate browser caching problems)

文件版本控制可以消除浏览器缓存问题(File versioning to eliminate browser caching problems)

当页面管理员通过Web表单和数据库表更改几个属性时，我有一个覆盖CSS文件的网页。 我的问题是，浏览器有时会缓存旧文件并忽略新版本。 有人建议我应该使用文件版本控制方案，它基本上会改变文件的名称，这样我就不必担心浏览器缓存旧版本。 除了版本控制方案之外，还有其他解决此问题的方法吗？

I have a web page that over_writes a CSS file when the page admin changes a few attributes through a web form and a database table. My problem is that the browser sometimes caches the old file and ignores the new version. It has been suggested to me that I should use a file versioning scheme that would basically change the name of the file so that I would never have to worry about the browser caching the old version. Is there any other way around this problem besides the versioning scheme?

最满意答案

将HTML文件包含在HTML标头中时，可以简单地向查询字符串添加一个参数：

<link rel="stylesheet" href="style.css?v=2">

在你的情况下，你可以每次页面管理改变一些东西时，以编程的方式增加这个数字（假设你已经设置了$cssVersion ）：

<link rel="stylesheet" href="style.css?v=<?php echo $cssVersion; ?>">

您必须将$cssVersion存储在数据库列或文件中。

When including your CSS file in the HTML header, you could simply add a parameter to the query string:

<link rel="stylesheet" href="style.css?v=2">

In your case, you could increment this number programmatically every time the page admin changes something (assuming you have set $cssVersion somewhere):

<link rel="stylesheet" href="style.css?v=<?php echo $cssVersion; ?>">

You would have to store $cssVersion in a database column or in a file.