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PHP7 Library for Authenticating LTI Requests

Question asked by Kent Slack on Sep 20, 2017
Latest reply on Dec 8, 2017 by

Does anyone know of a good PHP7 library that can be used for OAuth Authentication of LTI requests? The IMSGlobal library for PHP is for PHP5, and I have had major difficulty getting it to work with my LTI application. The core thing I am trying to do is authenticate the request (determine if the oauth_signature matches the expected value based on the shared secret), process the post parameters, and the redirect the user to a url with some of the post parameters encoded in the URL (using the get request method).