Installing PHP composer programmatically with a bash script on linux

The easiest way to install Composer is by using the bash script provided here.  What I do is use vim to create a file named composer-install.sh then post that script in it.

I do this in any folder, then I move the script to make it global as suggested in the documentation here.

Basically all you are doing is using the linux mv command to move the composer.phar script so it is in the users global space.