Codeigniter restclient not working

Phil's RestClient lib is already autdated.
He doesn't involved in anymore PHP related projects at the moments.

regarding REST,
the best client for you to use to communicate with your Rest server is just by using CURL library
https://packagist.org/packages/curl/curl

install it with composer,
make sure your codeigniter already configured to work with composer's autoload.
https://www.codeigniter.com/user_guide/g...oader.html

then use it in your PHP's client.