Define Your Dependencies

Put a file named composer.json at the root of your project, containing your project dependencies:

{
    "require": {
        "vendor/package": "1.3.2",
        "vendor/package2": "1.*",
        "vendor/package3": "^2.0.3"
    }
}

For more information about package versions usage, see the Composer documentation.

Install Composer and Dependencies

Run this in your project root:

curl -sS https://getcomposer.org/installer | php
php composer.phar install

Or download composer.phar into your project root. See the Composer documentation for complete installation instructions on various platforms.

Autoload Dependencies

Add a require 'vendor/autoload.php'; to your code to make all dependencies autoloadable and available to your code at runtime. Browse the packages we have to find more great libraries you can use in your project.

Define Your Package

Put a file named composer.json at the root of your package's repository, containing this information:

{
    "name": "your-vendor-name/package-name",
    "description": "A short description of what your package does",
    "require": {
        "php": ">=8.2",
        "another-vendor/package": "1.*"
    }
}

This is the strictly minimal information you have to give.

Publish It

Run composer validate to check the file for syntax errors and commit it to your repository. Then log in or register and hit the submit button in the menu to enter your public repository URL. Your package will then be crawled periodically, so all you have to do is keep the composer.json file up to date.

See the about page for the full guide, including how to name your package and how to share private code.