How to force the browser to reload cached CSS/JS files?

Question

I have noticed that some browsers (in particular, Firefox and Opera) are very zealous in using cached copies of .css and .js files, even be

Answer 1

Not sure why you guys are taking so much pain to implement this solution.

All you need to do if get the file's modified timestamp and append it as a querystring to the file

In PHP i would do it as:

filemtime is a PHP function that returns the file modified timestamp.