Installing Composer globally on CentOS

System Requirements#

Composer requires PHP 5.3.2+ to run. A few sensitive php settings and compile flags are also required, but when using the installer you will be warned about any incompatibilities.

First, go to the /tmp directory

cd /tmp

Download the composer.phar file

curl -sS https://getcomposer.org/installer | php

Move it to /usr/local/bin/

mv composer.phar /usr/local/bin/composer

now you should be able to use the command composer globally.