Installing PHPUnit on CentOS via Composer.phar

Overview

To install with yum, run the following command.

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$ sudo yum install php-xml php-pear php-phpunit-PHPUnit --enablerepo=epel

With yum, your existing php modules may get overwritten, which can affect your current environment.
For that reason, I have summarized below the steps to install via composer without any such impact.

Steps