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What is a Service Container in Laravel?

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Service Container or IoC in laravel is responsible for managing class dependencies meaning not every file needs to be injected in class manually but is done by the Service Container automatically. Service Container is mainly used in injecting class in controllers like Request object is injected. We can also inject a Model based on id in route binding.

For example, a route like below:

Route::get('/profile/{id}', 'UserController@profile');

With the controller like below.

public function profile(Request $request, User $id)

{

    // 

}

In the UserController profile method, the reason we can get the User model as a parameter is because of Service Container as the IoC resolves all the dependencies in all the controllers while booting the server. This process is also called route-model binding.

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Service container is a tool used for performing dependency injection in Laravel.

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