PHPackages esi/consistent-hash - PHPackages - PHPackages [Skip to content](#main-content)[PHPackages](/)[Directory](/)[Categories](/categories)[Trending](/trending)[Leaderboard](/leaderboard)[Changelog](/changelog)[Analyze](/analyze)[Collections](/collections)[Log in](/login)[Sign up](/register) 1. [Directory](/) 2. / 3. esi/consistent-hash ActiveLibrary esi/consistent-hash =================== ConsistentHash is a small library which implements consistent hashing. Modernized fork of flexihash/flexihash. 2.0.0(6mo ago)2201↓100%[1 issues](https://github.com/ericsizemore/consistent-hash/issues)[1 PRs](https://github.com/ericsizemore/consistent-hash/pulls)MITPHPPHP ^8.3CI passing Since Dec 4Pushed 1mo agoCompare [ Source](https://github.com/ericsizemore/consistent-hash)[ Packagist](https://packagist.org/packages/esi/consistent-hash)[ Docs](https://github.com/ericsizemore/consistent-hash)[ GitHub Sponsors](https://github.com/ericsizemore)[ Fund](https://ko-fi.com/ericsizemore)[ RSS](/packages/esi-consistent-hash/feed)WikiDiscussions main Synced 1mo ago READMEChangelog (3)Dependencies (12)Versions (8)Used By (0) ConsistentHash ============== [](#consistenthash) [![Build Status](https://camo.githubusercontent.com/14b56aebe414cc83027a10f7cd6a31231611661e4756baad374b024d970e102e/68747470733a2f2f7363727574696e697a65722d63692e636f6d2f672f6572696373697a656d6f72652f636f6e73697374656e742d686173682f6261646765732f6275696c642e706e673f623d6d61696e)](https://scrutinizer-ci.com/g/ericsizemore/consistent-hash/build-status/main)[![Code Coverage](https://camo.githubusercontent.com/b2cc50eb8c0b7312351053698bb9b72ecf08adda6e5b0568fc694ed212c0d3d3/68747470733a2f2f7363727574696e697a65722d63692e636f6d2f672f6572696373697a656d6f72652f636f6e73697374656e742d686173682f6261646765732f636f7665726167652e706e673f623d6d61696e)](https://scrutinizer-ci.com/g/ericsizemore/consistent-hash/?branch=main)[![Scrutinizer Code Quality](https://camo.githubusercontent.com/926dc3c795f2d644a839033c559339260e63c12269b247d4e38baaea2000c1ec/68747470733a2f2f7363727574696e697a65722d63692e636f6d2f672f6572696373697a656d6f72652f636f6e73697374656e742d686173682f6261646765732f7175616c6974792d73636f72652e706e673f623d6d61696e)](https://scrutinizer-ci.com/g/ericsizemore/consistent-hash/?branch=main)[![Continuous Integration](https://github.com/ericsizemore/consistent-hash/actions/workflows/continuous-integration.yml/badge.svg)](https://github.com/ericsizemore/consistent-hash/actions/workflows/continuous-integration.yml)[![Type Coverage](https://camo.githubusercontent.com/a8d6af038d2a0e06d82808627f598f6a5898473202ed151448c5f07c80177654/68747470733a2f2f73686570686572642e6465762f6769746875622f6572696373697a656d6f72652f636f6e73697374656e742d686173682f636f7665726167652e737667)](https://shepherd.dev/github/ericsizemore/consistent-hash)[![Psalm Level](https://camo.githubusercontent.com/2e2fdc275ce81f68c3cb572e39e330ddf51f58dcb1d4f2f41a3da0accc8487c1/68747470733a2f2f73686570686572642e6465762f6769746875622f6572696373697a656d6f72652f636f6e73697374656e742d686173682f6c6576656c2e737667)](https://shepherd.dev/github/ericsizemore/consistent-hash)[![Latest Stable Version](https://camo.githubusercontent.com/eef809eb8921a8fab60dbf2d77cc0de9ebb072576ce12041f23705442ce32653/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f762f6573692f636f6e73697374656e742d686173682e737667)](https://packagist.org/packages/esi/consistent-hash)[![Downloads per Month](https://camo.githubusercontent.com/f516aa6ae70b1c4c0c5881be7a4937c9a10bc978f593f3a5c4b0a5ca83318aae/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f646d2f6573692f636f6e73697374656e742d686173682e737667)](https://packagist.org/packages/esi/consistent-hash)[![License](https://camo.githubusercontent.com/c2efb9ac71cf7fa8fb4c6abf95a26f04789b65f89c1ecbdbcd3a41933789b7a3/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f6c2f6573692f636f6e73697374656e742d686173682e737667)](https://packagist.org/packages/esi/consistent-hash) 'Consistent Hash' is a small PHP library, which implements [consistent hashing](https://en.wikipedia.org/wiki/Consistent_hashing), which is most useful in distributed caching. Note This library is a fork of v3.0.0. The original library has not seen any releases since 2020. Installation ------------ [](#installation) You can install the package via composer: ``` $ composer require esi/consistent-hash ``` Usage ----- [](#usage) ``` use Esi\ConsistentHash; $hash = new ConsistentHash(); // bulk add $hash->addTargets(['cache-1', 'cache-2', 'cache-3']); // simple lookup $hash->lookup('object-a'); // "cache-1" $hash->lookup('object-b'); // "cache-2" // add and remove $hash->addTarget('cache-4'); $hash->removeTarget('cache-1'); // lookup with next-best fallback (for redundant writes) $hash->lookupList('object', 2); // ["cache-2", "cache-4"] // remove cache-2, expect object to hash to cache-4 $hash->removeTarget('cache-2'); $hash->lookup('object'); // "cache-4" ``` Benchmarks ---------- [](#benchmarks) #### PHPBench [](#phpbench) Performance can be tested with [PHPBench](https://phpbench.readthedocs.io). ``` $ git clone https://github.com/ericsizemore/consistent-hash.git $ cd consistent-hash $ ./vendor/bin/phpbench run --report=aggregate --iterations=4 --tag=branch_main ``` Or via composer: ``` $ composer run-script benchmark ``` There is also an option to view results as a bar chart: ``` $ composer run-script benchmark:chart ``` With [opcache](https://www.php.net/manual/en/book.opcache.php) enabled: ``` # Normal, aggregate report $ composer run-script benchmark:opcache # Bar chart $ composer run-script benchmark:chart:opcache ``` #### PHPUnit [](#phpunit) Benchmarks are also available through PHPUnit, though it is a bit more rudimentary. To see these benchmarks, run: ``` $ composer run-script phpunit:benchmark ``` About ----- [](#about) ### Requirements [](#requirements) - PHP >= 8.3 ### Credits [](#credits) - [Eric Sizemore](https://github.com/ericsizemore) - [All Contributors](https://github.com/ericsizemore/consistent-hash/contributors) And thanks to the library this is a fork of, [flexihash/flexihash](https://github.com/pda/flexihash): - [Paul Annesley](https://github.com/pda) - [Dom Morgan](https://github.com/dmnc) - [All flexihash Contributors](https://github.com/pda/flexihash/graphs/contributors) ### Contributing [](#contributing) See [CONTRIBUTING](./CONTRIBUTING.md). Bugs and feature requests are tracked on [GitHub](https://github.com/ericsizemore/consistent-hash/issues). ### Contributor Covenant Code of Conduct [](#contributor-covenant-code-of-conduct) See [CODE\_OF\_CONDUCT.md](./CODE_OF_CONDUCT.md) ### Backward Compatibility Promise [](#backward-compatibility-promise) See [backward-compatibility.md](./backward-compatibility.md) for more information on Backwards Compatibility. ### Changelog [](#changelog) See the [CHANGELOG](./CHANGELOG.md) for more information on what has changed recently. ### License [](#license) See the [LICENSE](./LICENSE) for more information on the license that applies to this project. ### Roadmap/TODO [](#roadmaptodo) See the [ROADMAP](./ROADMAP.md) for more information what is currently being planned. ### Security [](#security) See [SECURITY](./SECURITY.md) for more information on the security disclosure process. ### Health Score 42 — FairBetter than 89% of packages Maintenance74 Regular maintenance activity Popularity14 Limited adoption so far Community12 Small or concentrated contributor base Maturity58 Maturing project, gaining track record Bus Factor2 2 contributors hold 50%+ of commits How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~105 days Total 4 Last Release 206d ago Major Versions 1.x-dev → 2.0.02025-10-14 PHP version history (2 changes)1.0.0PHP ^8.2 2.0.0PHP ^8.3 ### Community Maintainers ![](https://www.gravatar.com/avatar/b7181952b087db2a847c6b90d5cc5e53948e66229ad16acf92ccca3e8767cb92?d=identicon)[ericsizemore](/maintainers/ericsizemore) --- Top Contributors [![ericsizemore](https://avatars.githubusercontent.com/u/723810?v=4)](https://github.com/ericsizemore "ericsizemore (179 commits)")[![renovate[bot]](https://avatars.githubusercontent.com/in/2740?v=4)](https://github.com/renovate[bot] "renovate[bot] (157 commits)")[![dmnc](https://avatars.githubusercontent.com/u/144790?v=4)](https://github.com/dmnc "dmnc (43 commits)")[![serima](https://avatars.githubusercontent.com/u/1130921?v=4)](https://github.com/serima "serima (17 commits)")[![pda](https://avatars.githubusercontent.com/u/15759?v=4)](https://github.com/pda "pda (12 commits)")[![sergeyklay](https://avatars.githubusercontent.com/u/1256298?v=4)](https://github.com/sergeyklay "sergeyklay (1 commits)")[![myxobek](https://avatars.githubusercontent.com/u/10741404?v=4)](https://github.com/myxobek "myxobek (1 commits)") --- Tags consistentconsistent-hashconsistent-hashinghashphpphphashconsistentConsistent Hashingconsistent hash ### Code Quality TestsPHPUnit Static AnalysisPHPStan, Psalm, Rector Code StylePHP CS Fixer Type Coverage Yes ### Embed Badge ![Health badge](/badges/esi-consistent-hash/health.svg) ``` [![Health](https://phpackages.com/badges/esi-consistent-hash/health.svg)](https://phpackages.com/packages/esi-consistent-hash) ``` ### Alternatives [poly-crypto/poly-crypto High-level cryptographic functions that are interoperable between NodeJS and PHP 7.1+ 127.8k1](/packages/poly-crypto-poly-crypto) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)