Some websites use highly volatile, oft-changing CSS and JavaScript files. In the case of these files, it's important that the developer prevent browsers from caching them. How do we do that? By using a phantom querystring, of course. We'll use PHP to tack the current time onto the file reference.

一些网站使用高度易变，经常更改CSS和JavaScript文件。 对于这些文件，开发人员应防止浏览器对其进行缓存，这一点很重要。 我们该怎么做？ 当然，通过使用幻像查询字符串。 我们将使用PHP将当前时间添加到文件引用中。

PHP (The PHP)

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It's a very simple technique and doesn't affect your CSS or JavaScript code in any way.

这是一种非常简单的技术，不会以任何方式影响您CSS或JavaScript代码。

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