The CMS will set these variables on your plugin before calling your init() and showSlot() methods. They give you information about where plugin is currently running from.
You can use syntax of the form:
$this->variableName
to access these variables from your PHP code.
The id of the current content item.
The HTML/DOM id of the div
element that your Plugin has been placed in.
The type of the current content item, e.g. document
, html
, picture
...
When an admin or a visitor is looking at a content item, this contains the version of a content item which is currently in view.
In visitor mode this will always be equal to the cms_core::$visitorVersion variable.
The nested id of your Plugin, if your Plugin is placed in a Nest.