composer

A package-based dependency manager for PHP projects.

• Interactively create a `composer.json` file:

composer init

• 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` and create `composer.lock`:

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` and note versions in `composer.lock` file:

composer update

• Update composer lock only after updating `composer.json` manually:

composer update --lock

• Learn more about why a dependency can't be installed:

composer why-not {user/package_name}

• Update composer to its latest version:

composer self-update

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