Composer is a great tool for managing dependancies in php. The basic premise is you can run composer install and it will download and install something like php unit so you don't have to look up where and how to install it. This can become very usefull of a project is using lots of dependancies. If you're not using third party libraries, you should be! Almost always you willl need to interface with another system. Whether that be AWS, PHPUnit, AMQLib, Behat or any other library composer is the best way to keep it up to date and install it.
To install if this doesn't work, go to https://getcomposer.org/download/:
php -r "readfile('https://getcomposer.org/installer');" > composer-setup.php
php composer-setup.php
php -r "unlink('composer-setup.php');"
Play Blokr Now FREE!
blokr.io the web game where you can eat other blocks!