Is it possible to run composer from a php script?

Question

PHP

Composer is written in php for php. Is it possible to run composer from a script?
I know that you can run it using system / exec. But on some hostings this function is not allowed.

Answer 1

I'm afraid this won't make much sense. Composer does not include VCS like git, hg, svn, they use the system ones. So running with require phar://composer.phar/ and emulating console input won't really save you.