REST API, Export to Temp Database

Hi Guys
I'm kindoff new to PHPRunner, but slowly get the hang of a few things.

I need some advice or some example code please.

I get a List with REST API, which work perfect, but while loading the list, I would like to export that data to a Mysql database (Insert or Update) if exists.

I have no idea which Event point to use or how to get the records from within PHPRunner / as it reads the list.
NOTE: PHPRunner events/code is still a little confusing for me.. Any good tutorial link on that or help?
Thanks, appreciate the help

Danie