Composer Cheat Sheet for developers Composer is the dependency manager for PHP and you are on a one-page-only documentation for this tool. Official documentation is on the official website, this page just brings you the essential. composer.phar most needed command line $ composer require foo/bar or foo/bar:1.0.0 or foo/bar=1.0.0 or "foo/bar 1.0.0" $ composer install $ composer update with optionna