Using cache Redis questions

Hello,
I have my redis server using docker.

I found the installation of phpredis a bit confusing to be honest, I couldn't even implement it.

At Codeigniter I saw that have an implementation of PredisHandler, but I didn't see anything in the documentation. Perhaps because the author no longer updates the project even though it is "stable".

Is PredisHandler recommended? Or would the best alternative be phpredis?

Do you know any place that has a more readable implementation of phpredis?

The implementation works perfectly when using Predis.