Creating a config file in PHP

Question

I want to create a config file for my PHP project, but I\'m not sure what the best way to do this is.

I have 3 ideas so far.

1-Use Variable<

Answer 1

If you think you'll be using more than 1 db for any reason, go with the variable because you'll be able to change one parameter to switch to an entirely different db. I.e. for testing , autobackup, etc.