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Example code of four-bytes/four-rate-limiting

Informations about the package four-rate-limiting

four-rate-limiting

PHP Version

Generic rate limiting library for PHP 8.4+. Four algorithms, header-based dynamic tracking, state persistence, PSR-16 cache backend.

Philosophy

This library provides no API-specific presets. Every API client knows its own rate limit rules best — configuration belongs in the consuming client, not in a generic library.

Installation

Quick Start

Algorithms

Algorithm Constant When to use
Token Bucket ALGORITHM_TOKEN_BUCKET Burst allowed, smooth average
Fixed Window ALGORITHM_FIXED_WINDOW Fixed time window (e.g. per minute)
Sliding Window ALGORITHM_SLIDING_WINDOW Rolling window (e.g. QPD without midnight reset)
Leaky Bucket ALGORITHM_LEAKY_BUCKET Steady throughput, no burst

Configuration

Interface

Advanced Usage

createCustom

Dynamic Header Tracking

Rate Limit Status

The getTypedStatus() method returns a typed DTO with all relevant information:

PSR-16 Cache Backend

The library supports any PSR-16 (Psr\SimpleCache\CacheInterface) implementation for distributed rate limiting (Redis, APCu, Memcached, etc.).

HTTP Client Integration

RateLimitMiddleware encapsulates the complete rate limiting logic for HTTP clients:

PSR-7 Header Compatibility

The library automatically normalizes PSR-7 headers (array<string, string[]> → array<string, string>). $response->getHeaders() can be passed directly to updateFromHeaders().

Architecture

Tests

License

MIT License. See LICENSE.

All versions of four-rate-limiting with dependencies

PHP Build Version
Package Version
Requires php Version ^8.4
psr/http-message Version ^2.0
psr/log Version ^3.0
psr/simple-cache Version ^3.0
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