Publishing a Package to Packagist

Publishing to Packagist makes a Composer package discoverable through its public repository.

What It Does

Publishing to Packagist makes a Composer package discoverable through its public repository. The following examples distinguish a normal use case, a boundary case and a practical application.

Requirements and Compatibility

Composer installed and a version-controlled composer.json; lockfile behavior differs between applications and libraries.

Composer uses composer.json for dependency declarations; applications should commit composer.lock for repeatable installation, while published library dependencies are resolved by consumers.

The code focuses on the core concept. Production implementation may also need routes, validation, persistence, authorization or deployment tooling.

Example 1: Basic Behavior

Package metadata needs a unique vendor/package name, license, description and autoload mapping.

composer init --name="example/acme-tools" --type="library" --no-interaction
composer validate --strict

This is a command-line example; use it in its appropriate file or shell, not in the PHP source editor.

Example 2: Another Case

Push a semantic-versioned Git tag to the public repository connected to Packagist.

git tag v1.0.0
git push origin v1.0.0

This is a command-line example; use it in its appropriate file or shell, not in the PHP source editor.

Practical Example: Putting It to Use

A minimal composer.json layout; adjust namespace and source directory to match real classes.

{
  "name": "example/acme-tools",
  "description": "Small utility library",
  "type": "library",
  "license": "MIT",
  "autoload": {"psr-4": {"Acme\\Tools\\": "src/"}}
}

This is a JSON configuration example; use it in its appropriate file or shell, not in the PHP source editor.

Important Behavior and Edge Cases

Validate composer.json, PSR-4 autoloading and version tags before first publication.

Comparison with Related Functions or Approaches

Common Beginner Mistakes

Key Takeaways

• Publishing to Packagist makes a Composer package discoverable through its public repository.
• Validate composer.json, PSR-4 autoloading and version tags before first publication.
• Semantic Git tags define installable package versions.

Before adapting these examples, verify the return values, test the failure paths and confirm that your application meets its security and environment requirements.