predis

Predis is a Redis client library for PHP, written entirely in PHP. It provides a high-level, object-oriented interface to Redis and does not require the PHP Redis extension to be installed. By using Composer, Predis can connect to single Redis instances, Sentinel-managed setups, or Redis Cluster deployments.

Key features include support for pipelines, transactions (MULTI/EXEC), Lua scripting (EVAL), publish/subscribe, and read-write splitting for replication. It supports authentication and various connection options, including DSN or parameter arrays. The library offers a flexible command wrapper that enables issuing Redis commands through PHP methods and can be extended with custom commands.

Predis is distributed as the predis/predis package and integrates with PHP’s autoloading. It runs on PHP versions compatible with the library, historically from PHP 5.3 onward, with modern releases requiring PHP 7 or higher. Because it is pure PHP, it can be easier to deploy in shared hosting or environments where compiling native extensions is not possible, though its performance is generally lower than that of the native phpredis extension.

The Predis design emphasizes portability and ease of use, with a modular structure that separates connection handling, command execution, and client behavior. It has been widely adopted in PHP ecosystems as a practical Redis client alternative when a pure-PHP solution is desired.