Good Old Fasioned Problem Solving

[MrRSMan]

Ok, this shouldn't be hard as (I don't think) it won't actually require much PHP coding. This is more of a riddle I need an answer to

Ok, I have 2 websites, on similar subjects. I have a PHP file on one of them, which I then use PHP include to put this onto a webpage in the SAME website.

What I want now is to use that same PHP file and using PHP include, put it's contents onto the OTHER website as well. That's all very easy, I know- I could do that. However, here's the crunch;

The two websites are of very similar design, but with very different colour schemes. They are both controlled by their own CSS. I need the included PHP file to adhere to these separate CSSs, depending on what website it's on.

[codeexploiter]

You can use two similar kind of CSS resources but with different style information. So that you don't have to change the class names and IDs in the including file.

[MrRSMan]

codeexploiter, could you please explain more?