Predis VS client

So far we have simply installed the Redis server in our computer, but we need to have a way to connect from a PHP application. For this there are two options, using phpredis, a PHP extension, or predis, a library. None is better than the other, they just have different objectives and scopes. phpredis has the advantage that it allows you to connect to Redis from any PHP project that is executed in that computer, whereas phpredis, being a library, only allows to connect from the projects where it's installed. In my case, I have experience with phpredis, so let's see how to install it.

I am going to connect to redis using the libary predis. Simply add the following to your compose.json

Personally, I prefer Redis for caching. I find it simple and intuitive to work with, using Predis as the connecting client.

That looks like you're connecting to a redis cluster running in cluster mode. The message is directing your client to retry its query on a different shard. You typically need to connect to those using a client/library that is cluster aware. I am not experienced with PHP, but this looks like an option.

That was an example of a simple UUID extension. Similarly, you can add support for any other type used in your application: DateTime, Decimal, Money. Or you can write a versatile extension that allows serializing any object (as it was done in KPHP). However, this is not the only use for extensions. I'll now show you some interesting examples that demonstrate other advantages of using extension types.