Unless you have been living under rocks, you have heard about composer already. It is a dependency manager and more than that actually. If your PHP app is using a lot of dependencies, then it is time to consult composer.
Here I will put some notes on how to install it and make it available globally so that you can use it from any directory.
First thing first, go and grab the phar file from composer download page
It would be a single phar file and u can use that as it is:
Of course you would need the composer.json file for the above to work where you would list the dependencies.
But, this would require you to call the phar from where you downloaded and that might not be handy
cd /to/composer/phar/file sudo mv composer.phar /usr/local/bin/composer
Now, you can call composer from any directory and rock from there
get more @ get composer
That is how you install composer on linux/mac computer and make it globally accessible with in