Eric over at “Make Easy Money With Google and AdSense” has a really great introduction to a really great idea with his post entitled “PHP Guide for AdSense Publishers“.
He gives a nice (EXTREMELY brief) tutorial/introduction to PHP, and then goes on to show how you can use it to make your AdSense and WordPress (or any PHP enabled website) admin a lot easier by having “templates” which contain your different AdSense units, and just using “includes” to put them into your pages.
This means having to change just one file containing your AdSense code, as opposed to changing every location where this code is used…
I think I might actually start using this idea. Thanks Eric 
One Comment to 
Yeah…the “includes” are a HUGE help. I know this from personal experience. It saves many frustrating hours to only have to modify one “include” file as opposed to modifying every page on every site.