Creating a web service and a web service function

First you need to read and execute the administration manual Setting_up_a_web_service. Now you should be more familiar about how web services are set into Moodle.

Preparation

Identify:

• core function(s) you need to call (or/and write)
• the param types that new to be send to your web service function
• the returned value types
• the user capabilities (it most of the time the ones logically required by the core functions)

declare your web service

Even for security purpose, you should avoid to define a service In some case you will want to force group of web service.