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Example code of phpdot/redis

Informations about the package redis

phpdot/redis

Coroutine-safe Redis client for PHP 8.4+. Wraps ext-redis \Redis with auto-reconnect, exponential backoff, exception translation, and a pool connector for phpdot/pool.

One RedisConnection owns one \Redis socket. Under Swoole, borrow a connection per coroutine through a pool so no two coroutines ever interleave commands on one socket — the same pattern phpdot/mongodb uses.

Table of Contents

Install

Requires PHP 8.4+, ext-redis ^6.0, and phpdot/contracts ^1.4.

Quick Start

Architecture

RedisConnection

RedisConfig

Lifecycle

Resilience

connect() retries up to maxRetries times with exponential backoff (100ms → 200ms → 400ms…). AUTH failures (NOAUTH, WRONGPASS) throw AuthenticationException immediately and are not retried. All other connection failures accumulate and throw ConnectionException once the retry budget is exhausted.

Coroutine Safety

ext-redis commands are blocking socket I/O. Two coroutines sharing one \Redis interleave request/reply bytes and corrupt each other — this is the footgun phpdot/redis-ql's own docs warn about.

phpdot/redis makes the safe pattern trivial: pool connections, borrow one per coroutine. Each pooled RedisConnection wraps exactly one \Redis; a coroutine borrows it, runs commands via getClient(), and returns it. No socket is ever shared across concurrent coroutines.

Connection Pooling

RedisConnector implements PHPdot\Contracts\Pool\ConnectorInterface, so phpdot/pool can hold and manage RedisConnection instances:

The connector depends only on phpdot/contracts — phpdot/pool is not a runtime requirement, so the package stays usable in non-pooled runtimes (FPM, CLI one-shots).

Exception Handling

RedisException from ext-redis is caught and translated inside connect(); RedisConnection's own methods throw PHPdot\Redis\Exception\* types only.

Escape Hatch

getClient(): \Redis returns the underlying ext-redis instance for any command the wrapper does not surface. This is the primary consumer seam — phpdot/cache's RedisDriver, phpdot/session's RedisHandler, and phpdot/redis-ql's PhpRedisClient can all receive a pooled \Redis through it.

API Reference

RedisConfig API

Method Returns Notes
connectHost() string socket path or tls://-prefixed host
buildContext() ?array merged stream/SSL context, or null
getHostString() string socket path or host:port for errors

RedisConnection API

Method Returns Throws
connect() void ConnectionException, AuthenticationException
close() void never
isConnected() bool never
ping() bool never
ensureConnected() void ConnectionException
reconnect() void ConnectionException, AuthenticationException
getClient() \Redis ConnectionException
getConfig() RedisConfig never

RedisConnector API

Implements PHPdot\Contracts\Pool\ConnectorInterface.

Method Returns Notes
connect() object fresh connected RedisConnection
isAlive(object) bool type-guarded + ping()
close(object) void type-guarded, never throws

All versions of redis with dependencies

PHP Build Version
Package Version
Requires php Version >=8.4
ext-redis Version ^6.0
phpdot/contracts Version ^1.4
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