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Composer
Composer is a dependency manager for PHP. You declare the libraries your project depends on in composer.json, and Composer installs and updates them for you. Packages are published on Packagist (https://packagist.org/).
For agents: Composer, the PHP dependency manager: docs covering composer.json schema, CLI commands, repositories, config, and private package authentication.
phpdependency managercomposer.jsonpackagistautoloader
- Authority
- 71 reach 21 · trust 10 · quality 25 · freshness 15
- Tier
- featured
- llms.txt
- https://getcomposer.org/llms.txt
- llms-full.txt
- https://getcomposer.org/llms-full.txt
- Sections
- 4
- Links
- 34
- Size
- 4633 bytes
- Popularity rank
- #1467
- Registered
- 2011-10-22
- Country
- France Hosting inference
- Hosting country
- France Hosting inference
- Country evidence
- No published address evidence collected yet
- Categories
- Developer tools · Open source projects · Documentation and reference
- For agents
- Documentation: developer or product docs worth reading, nothing to call
- Inferred actions
- Read documentation About these labels
- Audience
- developers · agents can: read docs · en
- First seen
- 2026-10-18T14:18:43.759Z
- Last checked
- 2026-10-27T14:54:54.479Z
- Badge
Their llms.txt
The beginning of the file, from our validated copy saved 2026-10-26T15:54:32.850Z. Cached copy · Source on getcomposer.org
# Composer
> Composer is a dependency manager for PHP. You declare the libraries your project depends on in composer.json, and Composer installs and updates them for you. Packages are published on Packagist (https://packagist.org/).
The links below point to the markdown source of each documentation page. All of it is also available as a single file at https://getcomposer.org/llms-full.txt
## Book
- [Introduction](https://getcomposer.org/doc/00-intro.md.md)
- [Basic usage](https://getcomposer.org/doc/01-basic-usage.md.md)
- [Libraries](https://getcomposer.org/doc/02-libraries.md.md)
- [Command-line interface / Commands](https://getcomposer.org/doc/03-cli.md.md)
- [The composer.json schema](https://getcomposer.org/doc/04-schema.md.md)
- [Repositories](https://getcomposer.org/doc/05-repositories.md.md)
- [Config](https://getcomposer.org/doc/06-config.md.md)
- [Runtime Composer utilities](https://getcomposer.org/doc/07-runtime.md.md)
- [Community](https://getcomposer.org/doc/08-community.md.md)
## Articles
- [Aliases](https://getcomposer.org/doc/articles/aliases.md.md): Alias branch names to versions
- [Authentication for privately hosted packages and repositories](https://getcomposer.org/doc/articles/authentication-for-private-packages.md.md): Access privately hosted packages/repositories
- [Autoloader optimization](https://getcomposer.org/doc/articles/autoloader-optimization.md.md): How to reduce the performance impact of the autoloader
- [Caching Composer dependencies](https://getcomposer.org/doc/articles/caching.md.md): Cache Composer downloads safely in CI and containers
- [Composer platform dependencies](https://getcomposer.org/doc/articles/composer-platform-dependencies.md.md): Making your package depend on specific Composer versions
- [Setting up and using custom installers](https://getcomposer.org/doc/articles/custom-installers.md.md): Modify the way certain types of packages are installed
- [Handling private packages](https://getcomposer.org/doc/articles/handling-private-packages.md.md): Hosting and installing private Composer packages
- [Setting up and using plugins](https://getcomposer.org/doc/articles/plugins.md.md): Modify and extend Composer's functionality
- [Repository priorities](https://getcomposer.org/doc/articles/repository-priorities.md.md): Configure which packages are found in which repositories
- [Resolving merge conflicts](https://getcomposer.org/doc/articles/resolving-merge-conflicts.md.md): On gracefully resolving conflicts while merging
- [Scripts](https://getcomposer.org/doc/articles/scripts.md.md): Script are callbacks that are called before/after installing packages
- [Troubleshooting](https://getcomposer.org/doc/articles/troubleshooting.md.md): Solving problems
- [Vendor binaries and the `vendor/bin` directory](https://getcomposer.org/doc/articles/vendor-binaries.md.md): Expose command-line scripts from packages
- [Versions and constraints](https://getcomposer.org/doc/articles/versions.md.md): Versions explained
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