Install PHP Composer

1) Update your packages:

sudo apt-get update

2) Install the curl utility:

sudo apt-get install curl

3) Download the installer:

sudo curl -s https://getcomposer.org/installer | php

4) Move the composer.phar file:

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

5) Use the composer command to test the installation. If Composer is installed correctly, the server will respond with a long list of help information and commands:

user@localhost:~# composer
   ______
  / ____/___  ____ ___  ____  ____  ________  _____
 / /   / __ \/ __ `__ \/ __ \/ __ \/ ___/ _ \/ ___/
/ /___/ /_/ / / / / / / /_/ / /_/ (__  )  __/ /
\____/\____/_/ /_/ /_/ .___/\____/____/\___/_/
                /_/
Composer version 1.3.2 2017-01-27 18:23:41

Usage:
  command [options] [arguments]

Options:
  -h, --help                     Display this help message
  -q, --quiet                    Do not output any message