In Laravel, dependency injection is a term used for the activity of injecting components into the user application. It’s a key element of agile architecture. The Laravel service container is a powerful tool that manages all class dependencies and performs dependency injection.

public function __construct(UserRepository $data)
    $this->userdata = $data;

In this given an example, the UserController needs to retrieve users data from a data source(database). So, we can inject a service that is able to recover all users. In this example, our UserRepository most likely uses Eloquent to get user’s data from the database.

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The Service Container in Laravel is a Dependency Injection Container and a Registry for the application. Dependency injection is commonly used in Laravel. Even access to Request we mostly inject it. public function __construct(Request $request){ }