thephpleague/oauth2-server — pull request #187 by josephspurrier (2014-07-12 07:03:10+00:00)
Title: Implicit grant now handles scope like password grant

http://tools.ietf.org/html/rfc6749#section-4.2.1

The scope should be pulled from $authParams['scope'] (without an s). The scope should also be handled the same way as the other grants.