Composer helps you declare, manage, and install dependencies of PHP projects.

See https://getcomposer.org/ for more information and documentation.

Download and install Composer by following the official instructions.

For usage, see the documentation.

Find public packages on Packagist.org.

For private package hosting take a look at Private Packagist.

Follow @packagist or @seldaek on X for announcements, or check the #composerphp hashtag.

For support, Stack Overflow offers a good collection of Composer related questions, or you can use the GitHub discussions.

Please note that this project is released with a Contributor Code of Conduct. By participating in this project and its community you agree to abide by those terms.

PHP 7.2.5 or above for the latest version.

PHP versions 5.3.2 - 8.1 are still supported via the LTS releases of Composer (2.2.x). If you run the installer or the self-update command the appropriate Composer version for your PHP should be automatically selected.

• unzip (or 7z/7zz)
• gzip
• tar
• unrar
• xz
• Git (git)
• Mercurial (hg)
• Fossil (fossil)
• Perforce (p4)
• Subversion (svn)

The need for these binary dependencies may vary depending on individual use cases. For most users, only 2 dependencies are essential for Composer: unzip (or 7z/7zz), and git. If the ext-zip extension is available, only git is needed, but this is not recommended.

• Nils Adermann | GitHub | X | naderman@naderman.de | naderman.de
• Jordi Boggiano | GitHub | X | j.boggiano@seld.be | seld.be

See also the list of contributors who participated in this project.

Please send any sensitive issue to security@packagist.org. Thanks!

Thank you to our sponsors for supporting the ongoing development and maintenance of Composer and Packagist.org! See getcomposer.org/sponsor for more information on becoming a sponsor.

Composer is licensed under the MIT License - see the LICENSE file for details.

• This project's Solver started out as a PHP port of openSUSE's Libzypp satsolver.