Manually Installing composer is an advanced technique, however there are several reasons why a developer might prefer this reason instead of using the interactive installation routine. The interactive installation checks your PHP installation to ensure that:
Since manual installation performs none of these checks. Below is how you can install composer manually on your machine.
You can simply chose your path whether it be $HOME/local/bin or any directory of your choice. But one thing to make sure is, it should be in your $PATH variables. This will allow the composer command being available.
Yes, it is. Now you can run composer in your machine globally.
For running composer from inside of any directory. Simply type