FlightPHP Container

A lightweight Dependency Injection Container (DIC) for PHP, to manage and streamline object dependencies effectively.

Features

• Lightweight and Efficient: Manage dependencies with ease.
• Flexible Configuration: Easily integrate with various PHP applications.
• PSR-11 Compliance: Ensures interoperability between containers.

Requirements

• PHP 7.4 or higher
• Composer installed on your system

Installation

To include the FlightPHP Container in your project, you can use Composer:

composer require flightphp/container

Simple usage

To use the FlightPHP Container, you can create a new instance of the container and bind your dependencies:

<?php

require 'vendor/autoload.php';

use flight\Container;

$container = new Container;

$container->set(PDO::class, fn(): PDO => new PDO(
  'mysql:host=localhost;dbname',
  'username',
  'password'
));

$pdo = $container->get(PDO::class);

var_dump($pdo);

/*
object(PDO)#3 (0) {
}
 */

Usage in FlightPHP Framework

You can use the FlightPHP Container in your FlightPHP application by setting the container instance:

<?php

require 'vendor/autoload.php';

use flight\Container;

$container = new Container;

$container->set(PDO::class, fn(): PDO => new PDO('sqlite::memory:'));

Flight::registerContainerHandler([$container, 'get']);

class TestController {
  private PDO $pdo;

  function __construct(PDO $pdo) {
    $this->pdo = $pdo;
  }

  function index() {
    var_dump($this->pdo);
  }
}

Flight::route('GET /', [TestController::class, 'index']);

Flight::start();

Go and visit that route in your dev server and you'll see something like:

object(PDO)#3 (0) {
}

Advance usage

FlightPHP Container can resolve dependencies recursively, allowing you to bind complex objects and dependencies:

<?php

require 'vendor/autoload.php';

use flight\Container;

class User {}

interface UserRepository {
  function find(int $id): ?User;
}

class PdoUserRepository implements UserRepository {
  private PDO $pdo;

  function __construct(PDO $pdo) {
    $this->pdo = $pdo;
  }

  function find(int $id): ?User {
    // Implementation ...
    return null;
  }
}

$container = new Container;

$container->set(PDO::class, static fn(): PDO => new PDO('sqlite::memory:'));
$container->set(UserRepository::class, PdoUserRepository::class);

$userRepository = $container->get(UserRepository::class);
var_dump($userRepository);

/*
object(PdoUserRepository)#4 (1) {
  ["pdo":"PdoUserRepository":private]=>
  object(PDO)#3 (0) {
  }
}
 */

License

FlightPHP Container is open-sourced software licensed under the MIT license.