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使用PHP来动态生成CSS/JS

Jun 06, 2016 pm 07:55 PM
css php use dynamic generate website

对于一个网站其实很多时候都需要对动态的生成所使用的CSS/JS,其中主要是CSS/JS中所包含的一些URL,当然这些URL信息也可以使用相对路径来实现,但在一些情况下使用相对路径并不能解决这个难题。 按照Yahoo YSlow(http://developer.yahoo.com/yslow/help)的

对于一个网站其实很多时候都需要对动态的生成所使用的CSS/JS,其中主要是CSS/JS中所包含的一些URL,当然这些URL信息也可以使用相对路径来实现,但在一些情况下使用相对路径并不能解决这个难题。

按照Yahoo YSlow(http://developer.yahoo.com/yslow/help) 的建议1,就是必须减少HTTP的请求,当然手动把所有代码合并是一种方法,但这种方法反而会带来两个更糟的问题,把所有CSS/JS都合并到一个文件 中,当然不利于代码的阅读和管理。如果使用jQuery,因为不同的Plugin都是会放在不同的js文件中,和Yahoo YSlow的建议有较大的冲突,当然是用动态语言来合并这些js文件应该是个不错的idea。合并过程中还可以使用jsmin.php来进行js文件的压 缩。

如想使用这个技术可参考以下的几篇说明:

  1. Automatic merging and versioning of CSS/JS files with PHP
  2. Adding JSMin to my CSS/JS merging script (这篇写了一般,其实有更好的方法来做)
  3. GZip files with .htaccess and PHP (这篇是说明如何对输出的PHP内容进行GZip的压缩,因为动态文件无法使用Apache 的 GZIP的库来压缩,所以为了节省传递数据必须在PHP中把输出内容进行压缩)。
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