Download Composer

Run this in your terminal to get the latest Composer version:

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

Or if you don't have curl:

php -r "eval('?>'.file_get_contents('https://getcomposer.org/installer'));"

This installer script will simply check some php.ini settings, warn you if they are set incorrectly, and then download the latest composer.phar in the current directory

Installer Options

You can install composer to a specific directory by using the --install-dir option and providing a target directory. Options must be appended to -- so that PHP ignores them, like -- --install-dir=bin, example:

curl -sS https://getcomposer.org/installer | php -- --install-dir=bin

Manual Download

If you prefer to download the phar manually, here are the available versions:

Latest Snapshot
1.0.0-alpha8 (2014-01-06)
1.0.0-alpha7 (2013-05-04)
1.0.0-alpha6 (2012-10-23)
1.0.0-alpha5 (2012-08-18)
1.0.0-alpha4 (2012-07-04)
1.0.0-alpha3 (2012-05-13)
1.0.0-alpha2 (2012-04-03)
1.0.0-alpha1 (2012-03-01)