• Source: Composer (software)

Composer is an application-level dependency manager for the PHP programming language that provides a standard format for managing dependencies of PHP software and required libraries. It was developed by Nils Adermann and Jordi Boggiano, who continue to manage the project. They began development in April 2011 and first released it on March 1, 2012. Composer is strongly inspired by Node.js's "npm" and Ruby's "bundler". The project's dependency solving algorithm started out as a PHP-based port of openSUSE's libzypp SAT solver.
Composer runs from the command line and installs dependencies (e.g. libraries) for an application. It also allows users to install PHP applications that are available on "Packagist" which is its main repository containing available packages. It also provides autoload capabilities for libraries that specify autoload information to ease usage of third-party code.




Syntax






= Commands

=
Composer offers several parameters including :

require: add the library in parameter to the file composer.json, and install it.
install: install all libraries from composer.json. It's the command to use to download all PHP repository dependencies.
update: update all libraries from composer.json, according to the allowed versions mentioned into it.
remove: uninstall a library and remove it from composer.json.




= Libraries definition

=
Example of composer.json generated by the following command:

composer require monolog/monolog




= Versions

=
The different authorized versions of the libraries are defined by:




Supported frameworks


Symfony version 2 and later
Laravel version 4 and later
CodeIgniter version 3.0 and later
CakePHP version 3.0 and later
FuelPHP version 2.0 and later
Drupal version 8 and later
TYPO3 version 6.2 and later
Neos Flow version 2.0 and later
SilverStripe version 3.0 later
Magento version 2.0 later
OpenMage version 20.0.0 and later
Yii version 1.1 and later
Laminas
Silex (web framework)
Lumen (web framework)
Adianti Framework version 1 and later




See also


PEAR




References






External links




Official website
Composer on GitHub
Composer documentation
Composer Tutorial
Packagist - the main Composer repository
Composer at Open Hub

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