WP Shortcodes API

The plugin take all of the data registered and created a multi-dimensional
array in an option called ‘_shortcodes’. Existing shortcodes that WP is away of
are also stored here with just their name and callback.

A few static methods for checking on shortcode info are provided.
GetShortcodeAtts($shortcode_name)
ShortcodeInPost($shortcode_name, $post_id)

Creating a new media button in the editor is easy with the add_media_button()
method. Just pass your shortcode name, attributes, a page title, introductory
text, and an icon image url.