If you already have composer installed - skip this step

To download composer in environment directory via curl use:

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

Or if you don't have curl:

php -r "readfile('https://getcomposer.org/installer');" | php

Use composer to install application vendors and generate autoload file:

composer.phar install

You must have Apache installed to make application works properly by default, or you can start PHP's own server to test it. Make sure that environment root targeted to the "web" directory.

http://silex.sensiolabs.org/download

https://getcomposer.org/download/