I need to my portal that I'm building to be able to integrate with an existing system. The portal just have to pull data from the system database so that any update made from the system, the portal will also receive an update.
I have read this:
However I still could not get the idea on where to start first. I mean, which php file inside Joomla 3.x that I should modify?
Is there a better & simpler explanation as I'm too bad understanding a complex explanation