tldr/pages/common/composer.md

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# composer
> A package-based dependency manager for PHP projects.
> Homepage: <https://getcomposer.org/>.
- Add a package as a dependency for this project, adding it to `composer.json`:
`composer require {{user/package_name}}`
- Install all the dependencies in this project's `composer.json`:
`composer install`
- Uninstall a package from this project, removing it as a dependency from `composer.json`:
`composer remove {{user/package_name}}`
- Update all the dependencies in this project's `composer.json`:
`composer update`
- Update composer to the latest version:
`composer self-update`