Composer – A dependency manager for PHP
Composer is a dependency management tool for PHP that enables us to define dependencies for a PHP application, and Composer installs/updates them. Composer is completely written in PHP and is an application in the PHP Archive (PHAR) format.
Note
Composer downloads dependencies from https://packagist.org/. Any dependency for an application can be installed through Composer as long as it is available on Packagist. Also, complete applications can be installed through Composer if they are available at Packagist.
Composer installation
Composer is a command line tool and can be installed globally in the operating system, or the composer.phar file can be placed in the root of the application and then executed from the command line. For Windows, an executable setup file is provided, which can be used to install Composer globally. For this book, we will follow the instructions for Debian/Ubuntu globally. Perform the following steps:
- Issue the following...
