README

Lightweight autowiring DI container for PHP 8.2+. Zero dependencies. Can be used standalone or as part of the Antares framework.

Installation

composer require fatjon-lleshi/antares-container

Standalone Usage

Autowiring

The container resolves classes and their dependencies automatically via reflection. No configuration needed for concrete classes.

use Antares\Container\Container;

class Logger {}

class UserService {
    public function __construct(
        private readonly Logger $logger
    ) {}
}

$container = new Container();
$service = $container->make(UserService::class);

Binding Interfaces

Bind an interface to a concrete implementation:

interface LoggerInterface {}
class FileLogger implements LoggerInterface {}

$container = new Container();
$container->bind(LoggerInterface::class, FileLogger::class);

$logger = $container->make(LoggerInterface::class);

Singletons

Register a class as a singleton — the same instance is returned on every make() call. Use this for classes that require primitive constructor arguments (like config values from .env):

$container->singleton(Database::class, function(Container $container) {
    return new Database(
        host: $_ENV['DB_HOST'],
        port: (int) $_ENV['DB_PORT'],
        name: $_ENV['DB_NAME'],
    );
});

$db = $container->make(Database::class);

Nested Autowiring

The container recursively resolves nested dependencies:

class Cache {}

class Repository {
    public function __construct(
        private readonly Database $db,
        private readonly Cache $cache,
    ) {}
}

$repository = $container->make(Repository::class);

Error Handling

Unbound Interface

If you try to resolve an interface without binding it, a ContainerException is thrown:

use Antares\Container\ContainerException;

try {
    $container->make(LoggerInterface::class);
} catch (ContainerException $e) {
    echo $e->getMessage();
}

Circular Dependency

Circular dependencies are detected and throw a ContainerException:

class A {
    public function __construct(public B $b) {}
}
class B {
    public function __construct(public A $a) {}
}

$container->make(A::class); // throws ContainerException: Circular dependency detected

Unresolvable Primitive

If a class constructor has primitive type hints (string, int, etc.) with no default values, the container cannot autowire them. Register the class as a singleton instead:

class Mailer {
    public function __construct(
        public readonly string $host,
        public readonly int $port,
    ) {}
}

$container->singleton(Mailer::class, fn() => new Mailer(
    host: $_ENV['MAIL_HOST'],
    port: (int) $_ENV['MAIL_PORT'],
));

Requirements

PHP 8.2+

License

MIT

fatjon-lleshi / antares-container

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