From Habari Project
Options are site-specific values stored in the site's database.
It is recommended that Options belonging to a Plugin have names prepended with the plugin's name. For example, the twitter plugin has a limit option, twitter__limit.
Retrieve a stored Option.
$limit = Options::get( "twitter__limit" );
It is also possible to assign a default value using the optional second argument. In the following example, if no limit has been set, 1 will be returned.
$limit = Options::get( "twitter__limit", 1 );
Store an Option.
Options::set( "twitter__limit", $limit );
Unset an Option from the database.
Options::delete( "twitter__limit" );
It is also possible to unset a number of Options if they are passed as an array.
Options::delete( array( "twitter__limit", "twitter__prepend" ) );