infection/infection

Infection is a Mutation Testing framework for PHP. The mutation adequacy score can be used to measure the effectiveness of a test set in terms of its ability to detect faults.

0.32.6 2026-02-26 14:34 UTC

Requires

• php: ^8.2
• composer-runtime-api: ^2.0
• ext-dom: *
• ext-json: *
• ext-libxml: *
• ext-mbstring: *
• colinodell/json5: ^3.0
• composer/xdebug-handler: ^3.0
• fidry/cpu-core-counter: ^1.0
• infection/abstract-testframework-adapter: ^0.5.0
• infection/extension-installer: ^0.1.0
• infection/include-interceptor: ^0.2.5
• infection/mutator: ^0.4
• justinrainbow/json-schema: ^6.0
• nikic/php-parser: ^5.6.2
• ondram/ci-detector: ^4.1.0
• psr/log: ^2.0 || ^3.0
• sanmai/di-container: ^0.1.12
• sanmai/duoclock: ^0.1.0
• sanmai/later: ^0.1.7
• sanmai/pipeline: ^7.2
• sebastian/diff: ^4.0 || ^5.0 || ^6.0 || ^7.0 || ^8.0
• symfony/console: ^6.4 || ^7.0 || ^8.0
• symfony/filesystem: ^6.4 || ^7.0 || ^8.0
• symfony/finder: ^6.4 || ^7.0 || ^8.0
• symfony/polyfill-php85: ^1.33
• symfony/process: ^6.4 || ^7.0 || ^8.0
• thecodingmachine/safe: ^v3.0
• webmozart/assert: ^1.11 || ^2.0

Requires (Dev)

• ext-simplexml: *
• fidry/makefile: ^1.0
• fig/log-test: ^1.2
• phpbench/phpbench: ^1.4
• phpstan/extension-installer: ^1.4
• phpstan/phpstan: ^2.1
• phpstan/phpstan-phpunit: ^2.0
• phpstan/phpstan-strict-rules: ^2.0
• phpstan/phpstan-webmozart-assert: ^2.0
• phpunit/phpunit: ^11.5.27
• rector/rector: ^2.2.4
• shipmonk/dead-code-detector: ^0.14.0
• shipmonk/name-collision-detector: ^2.1
• sidz/phpstan-rules: ^0.5.1
• symfony/yaml: ^6.4 || ^7.0 || ^8.0
• thecodingmachine/phpstan-safe-rule: ^1.4
• webmozarts/strict-phpunit: ^7.15

Conflicts

• antecedent/patchwork: <2.1.25
• dg/bypass-finals: <1.4.1

BSD-3-Clause

• Maks Rafalko
• Oleg Zhulnev
• Gert de Pagter
• Théo FIDRY
• Alexey Kopytko
• Andreas Möller

• testing
• unit testing
• coverage
• mutation testing
• mutant
• mutation framework

README

Infection - Mutation Testing framework

Please read documentation here: infection.github.io

• Twitter: @infection_php
• Mastodon: @infection_php
• Discord: https://discord.gg/ZUmyHTJ
• Playground - try it right in your browser!

Contributing

Infection is an open source project that welcomes pull requests and issues from anyone. Before opening pull requests, please consider reading our short Contribution Guide.

Sponsors

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Companies

Individuals

The full list of awesome Infection sponsors is here: https://github.com/sponsors/infection

Credits

This project is highly inspired from Pádraic Brady (@padraic)'s Humbug library. Humbug has since then been discontinued in favour of this project.