Install phpunit on windows

Old answer (2014): It's said that phpunit will not be available via PEAR since December 2014.
So it's easy to install it using composer:

composer global require "phpunit/phpunit=4.1.*"

Update 2019: it should be installed as a local (for your project) development package:

 composer require --dev phpunit/phpunit ^8

Update 2020: it should be installed as a local (for your project) development package: composer require --dev phpunit/phpunit ^9.3

Try the following instructions:

1. In the command prompt, switch to the directory that you installed PHP to by running cd C:\php\
2. Then install PEAR by running php go-pear.phar
3. Press Enter to accept the default when it asks you “Are you installing a system-wide PEAR or a local copy?”
4. Press Enter again to accept the file layout.
5. Press Enter to finish.
6. Run the following commands (they may take a while to update, be patient):
   • pear channel-update pear.php.net
   • pear upgrade-all
   • pear channel-discover pear.phpunit.de
   • pear channel-discover components.ez.no
   • pear channel-discover pear.symfony-project.com
   • pear update-channels
7. Clear your pear cache pear clear-cache
8. To install PHPUnit, run pear install --alldeps --force phpunit/PHPUnit
9. To test that PHPUnit was successfully installed, run phpunit -v