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PHPUnit is the de-facto standard for unit testing in PHP projects. It provides both a framework that makes the writing of tests easy as well as the functionality to easily run the tests and analyse their results.


  • PHPUnit 3.7 requires PHP 5.3.3 (or later) but PHP 5.4.6 (or later) is highly recommended.
  • PHP_CodeCoverage, the library that is used by PHPUnit to collect and process code coverage information, depends on Xdebug 2.0.5 (or later) but Xdebug 2.2.1 (or later) is highly recommended.


There a three supported ways of installing PHPUnit.

You can use the PEAR Installer or Composer to download and install PHPUnit as well as its dependencies. You can also download a PHP Archive (PHAR) of PHPUnit that has all required (as well as some optional) dependencies of PHPUnit bundled in a single file.

PEAR Installer

The following two commands (which you may have to run as root) are all that is required to install PHPUnit using the PEAR Installer:

pear config-set auto_discover 1
pear install


To add PHPUnit as a local, per-project dependency to your project, simply add a dependency on phpunit/phpunit to your project's composer.json file. Here is a minimal example of a composer.json file that just defines a development-time dependency on PHPUnit 3.7:

    "require-dev": {
        "phpunit/phpunit": "3.7.*"

PHP Archive (PHAR)

chmod +x phpunit.phar


The documentation for PHPUnit is available in different formats:


The #phpunit channel on the Freenode IRC network is a place to chat about PHPUnit.

List of Contributors

Thanks to everyone who has contributed to PHPUnit! You can find a detailed list of contributors on every PHPUnit related package on GitHub. This list shows only the major components:

A very special thanks to everyone who has contributed to the documentation and helps maintaining the translations:

Please refer to for information on how to contribute to PHPUnit and its related projects.

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