In a new post from Performancing.com today, Chris Garrett looks at building smarter blog ads with the help of a little PHP.

If you want to squeeze every last drop of revenue potential out of your blog without annoying your loyal visitors then you need to be a bit clever about the way you display advertising. I'm going to show you some simple PHP template code you can use to add some ad' logic to your template.

He goes through a few standards to follow first, including not showing ads to registered users and showing additional ads for visitors arriving via a search engine. He gives examples with the Google Adsense code, and sets up different kinds of ad sections - registered users, search engine users, date sensitive, and the post date of the entry...