Yahoo! Social offers a PHP SDK currently in Alpha stage. The main difference between PHP5 and PHP is the available storage. As the site states, the new implementation is more flexible because developers can store OAuth tokens in a PHP session, in a database, or in memcache. Requirements showcase OAuth, Open ID, OpenSocial, and JSON with its respective redirected links. Examples include fetching YQL, fetching social data, fetching people and activities with OpenSocial, and adding contacts. Tests offer functional examples and results as well. Despite the fact that the SDK is in a experimental stage, developers have the opportunity to plan social directory and contact applications in advance.
Understanding the mind of the consumer is the crux of any marketing campaign, and having the ability to monitor whether these efforts are working or not is priceless. Thanks to Google's release of Multi-Channel Funnels in Google Analytics last year, this is a possibility. There have been numerous requests that this data be made available via an API, and finally it's here, Google has released the Multi-Channel Funnels Reporting API.
Hootsuite added to its API portfolio with the Interaction History API. The API allows developers to monitor social media exchanges of its app users and other social media profiles. The goal of the API is to provide more context to social media exchanges. The API has Twitter and Facebook endpoints.