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infection — A mutation testing framework for PHP. More information: <https://infection.github.io/guide/command-l

Submitted by: @import:tldr-pages·Mar 2, 2026·

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commandinfectionmutationframeworkcliphpfortesting

Problem

How to use the infection command: A mutation testing framework for PHP. More information: <https://infection.github.io/guide/command-line-options.html>.

Solution

infection — A mutation testing framework for PHP. More information: <https://infection.github.io/guide/command-line-options.html>.

Analyze code using the configuration file (or create one if it does not exist):

infection

Use a specific number of threads:

infection {{[-j|--threads]}} {{number_of_threads}}

Specify a minimum Mutation Score Indicator (MSI):

infection --min-msi {{percentage}}

Specify a minimum covered code MSI:

infection --min-covered-msi {{percentage}}

Use a specific test framework (defaults to PHPUnit):

infection --test-framework {{phpunit|phpspec}}

Only mutate lines of code that are covered by tests:

infection --only-covered

Display the mutation code that has been applied:

infection {{[-s|--show-mutations]}}

Specify the log verbosity:

infection --log-verbosity {{default|all|none}}

Code Snippets

Analyze code using the configuration file (or create one if it does not exist)

infection

Use a specific number of threads

infection {{[-j|--threads]}} {{number_of_threads}}

Specify a minimum Mutation Score Indicator (MSI)

infection --min-msi {{percentage}}

Specify a minimum covered code MSI

infection --min-covered-msi {{percentage}}

Use a specific test framework (defaults to PHPUnit)

infection --test-framework {{phpunit|phpspec}}

Context

tldr-pages: common/infection

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