PHP Dependency Injection Tutorial + 3 Code Examples 2023
Dependency Injection PHP Tutorial Dependency injection is a popular design pattern used in modern programming languages to promote code reusability, maintainability, and testability. It allows developers to manage object dependencies and decouples classes from their dependencies, making them more flexible and easier to manage. This article is part of our larger series on using Object-Oriented Programming (OOP) in PHP. Click here to start from the beginning. In this article, we will discuss what dependency injection is, how it can be used in PHP, and the different types of dependency injection available. Dependency Injection PHP Code Example <?php require 'vendor/autoload.php'; use DI\ContainerBuilder; // Instantiate container builder $builder = new ContainerBuilder(); // Configure container $builder->addDefinitions([ UserController::class => function ($container) { return new UserController( $container->get(UserService::class) ); }, UserService::class => function ($container) { return new UserService(); }, ]); // Build container $container = $builder->build(); class UserService { public function createUser(array $data) { // validate…
