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Dependency Injection and the art of services and containers >

CHAPTER

Dependency Injection Container

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Challenge #1 of 1

Q: 

Check out the following code:

use Pimple\Container;

$container = new Container();
$container['email_loader'] = function(Container $container) {
    return new EmailAddressLoader();
};

$loader1 = $container['email_loader'];
$loader2 = $container['email_loader'];

Which of the following is the most accurate?

a)

The $loader1 and $loader2 objects are the exact same object in memory.

b)

The container creates 2 new EmailAddressLoader objects: one each time we ask for the email_loader service.

c)

The container creates one email_loader object when the container is loaded, then returns just that one object each time we ask for the email_loader service.

d)

The container creates zero EmailAddressLoader objects: it doesn't create them until you actually call a method on the object.

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