Take PHPUnit as an example. You can install it using Composer doing this : composer require phpunit/phpunit This will install a phpunit shortcut in vendor/bin directory. This obviously means you can run it. But, you would have to point to the exact location of the phpunit file to run : /home/username/mysite/vendor/bin/phpunit phpunit.xml But, that’s long and uncomfortable. And you would have to install PHPUnit separately for each projects. I’m gonna tell you how to install binaries globally as well as running it simply.... [READ MORE]