Are you familiar with Composer?

Yes, I am familiar. Composer is a dependency manager for PHP.

It allows:

• Declaring libraries that your project depends on.
• Managing these dependencies (installing, updating).
• Automatically loading classes (autoloading).

Main components:

• composer.json: The file that describes the project's dependencies and other parameters.
• composer.lock: The file that records the exact versions of installed dependencies.
• vendor/: The directory where dependencies are installed by default.
• autoload.php: The autoload file generated by Composer.

Example commands:

# Installing dependencies
composer install

# Updating dependencies
composer update

# Installing a specific dependency
composer require <package-name>

# Installing a dependency for development
composer require --dev <package-name>

Example composer.json:

{
    "name": "my/project",
    "description": "My project description",
    "require": {
        "php": ">=7.4",
        "monolog/monolog": "^2.0"
    },
    "autoload": {
        "psr-4": {
            "MyApp\\": "src/"
        }
    }
}

I use Composer in all my PHP projects.