How to implement links in the program?

Question

PHP

Hello!
I have such a task.
There are 3 objects: the 1st is dependent on the 3rd, the 2nd is on its own.
I set the parameters, the data is calculated and I get the calculation of these 3 objects.
But what should I do if I change 1 of the parameters of the associated object after calculations?
I would at least have a direction where to look.
All calculations are done by php, the calculated data will be loaded using js

Answer 1

See how you change it.
Make it automatic when changing so that it is recalculated.