Do I have to install php-redis and redis both together?

Hello.

First of all, thank you so much for developing a useful plugin.

I’ve seen some tutorials and installed Redis, which seems to be working fine.

However, the tutorial sometimes installs only redis on the server, and sometimes installs both redis and php-redis together.

Do I need too install php-redis?

I run few WordPress websites in Ubuntu 20.04 + php7.4 + nginx + mariadb server.

thank you