What is the use of Wordpress APIs?

I saw in wordpress some APIs being publi开发者_如何学Pythonshed for developers. What could a developer gain by using those APIs?

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I think you've taken API to mean something similar to what Flickr and Vimeo do, which they are not. They are simply ways for you to access and ammend core functionality of the Wordpress platform, so as to bend it to do what ever it is you need it to do.

There are ways to pull data from your blog to a mobile devise, but that is a very different question.

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Wordpress API are for those that want to develop a theme, or writing custom plugins for Wordpress.

Either way, you can use to integrate Wordpress in your exisiting php site, using the powerful backend as an administration tool and the using the API to retrieve the content and present it in your (already) website. http://codex.wordpress.org/Integrating_WordPress_with_Your_Website