Problem using Swagger-php

I want to be able to generate documentation for Moodle web services by using swagger-php. I couldn’t find any detailed guide or examples, I just read what I could find on github but nothing is working for me so far.

 

This is what I’ve done at the moment:

 

1. I've downloaded and installed swagger editor following the steps and documentation mentioned in github : https://github.com/swagger-api/swagger-editor

2. I've installed swagger-php from github as well following the steps mentioned:https://github.com/zircote/swagger-php

3. I've installed composer as requested in http://zircote.com/swagger-php/Getting-started.html#installation

4. Tried reading http://zircote.com/swagger-php/Getting-started.htm but couldn't make a step forward.

I'll be happy to provide more information if needed.