Add php to track keywords

I’m a wordpress newb so bear with me.
Is there a way to add php to your blog so that you can track adwords keywords?
Example:
My blog url is http://www.mysite.com
To track Adwords keywords I need url’s that look something like this:
http://www.mysite.com/?id=ekeyword
http://www.mysite.com/?id=pkeyword
http://www.mysite.com/?id=bkeyword
where these 3 url’s are one adgroup and e,p,b represent the 3 match types and all point to http://www.mysite.com . If I am able to make the page dynamic, I would like to be able to pass the keyword info all the way to conversion. For example, a shareasale affiliate link on the page would normally look like http://www.shareasale.com/r.cfm?B=xxxx&U=xxxx&M=xxxx . In order to track to the keyword level, you would add ‘&afftrack=’ followed by the match type and keyword. What I would like to do is have it read ‘&afftrack={id}’ where the keyword would be passed along from the original click. Is this possible?