On the SitePoint PHP blog there's a recent post showing you how to combine PHP and the Coinbase API to add the ability to accept bitcoins as payment in your application. This is part one in a series of posts about making the connection and integrating it into the application.

Have you ever thought about selling your services in exchange for Bitcoins? It’s not so strange – today, many big players are actually doing it. From OkCupid to KhanAcademy, even WordPress is accepting Bitcoin. Also, some countries are thinking about it as a currency. Today, we will see how to accept Bitcoin payments on your website/application in an easy way, with the Coinbase API (and its SDK).

He briefly explains what kind of services the Coinbase API provides and talks about some of the different integration methods they offer. While they do offer a "button" you can add to the site, this tutorial focuses on the PHP integration using their SDK. They help you get it installed and show how to use the Coinbase site to set up authentication and authorization handling. He helps you get an instance of the Coinbase object ready for use and shows how to use it to interact with your account. The SDK also allows you to create the same button as the Coinbase site does, just in a more programatic way.