OK, so I just finished up trying to improve this bit of my site, and I can't figure it out.
I want to have this code in an external file rather than coded straight into the block to make it easier to manage, but can't figure out how to do it.
So I have just a few questions which I hope someone could answer for me please.
1. Can I use the php include function in a block, if so, how do I code it?
2. To put this script into an external file, do I need to ammend it at all?
3. What file format would the external file be, I assumed php but I don't want to assume anything at the moment.

I hope someone can help me with this.

Thanks