Is there any way to install Composer globally on Windows?

I've read the global installation documentation for Composer, but it's for *nix systems only:

curl -s https://getcomposer.org/installer | php
sudo mv composer.phar /usr/local/bin/composer

I would be such happy doing the same on Windows, that's the OS of my development machine. I would be able to run

composer update

From an arbitrary folder where composer.json exists. Interpreter php.exe is already in PATH variable.

Any clue?

Sure. Just put composer.phar somewhere like C:\php\composer.phar, then make a batch file somewhere within the PATH called composer.bat which does the following:

@ECHO OFF
php "%~dp0composer.phar" %*

The "%*" repeats all of the arguments passed to the shell script.

Then you can run around doing composer update all ya want!

Install Composer

On Windows, you can use the Composer Windows Installer.