Configure the application via a container

[mnapoli]

This is an implementation for what we discussed in #2778.

The idea is to simplify how to configure the application when using a PSR-11 container.

Here is an example with PHP-DI, using the default services from Slim:

$container = new DI\Container;

$app = AppFactory::createFromContainer($container);

Here is an example when we want to overload one service:

$container = new DI\Container;
$container->set(CallableResolverInterface::class, $customInstance);

$app = AppFactory::createFromContainer($container);

(in reality I would recommend using a config file, but the example here is simpler)

instead of the current way of doing it:

$container = new DI\Container;

AppFactory::setContainer($container);
AppFactory::setCallableResolver($customResolver);
$app = AppFactory::create($container);

The advantages:

• AppFactory is no longer storing global state, meaning subsequent calls to AppFactory::create() will not be affected by any previous call to AppFactory
• containers can come pre-configured for Slim

The 2nd point is interesting for PHP-DI: the bridge could provide a pre-configured container for Slim. Users would just have to call AppFactory::createFromContainer($container), which is pretty cool.

[coveralls]

Coverage remained the same at 100.0% when pulling 691878f on mnapoli:2778-configure-app-via-container into a62257e on slimphp:4.x.

[l0gicgate]

This is great, thank you for this contribution. I would like to mention that I’d like to work closely with third-party library devs like you to make Slim flexible and sensical in terms of approaching different problems. I highly value your input @mnapoli

[l0gicgate]

This is great, thank you for this contribution. I would like to mention that I’d like to work closely with third-party library devs like you to make Slim flexible and sensical in terms of approaching different problems. I highly value your input @mnapoli

[l0gicgate]

Looks good to me. Please have a quick look before I merge @adriansuter!

[adriansuter]

@l0gicgate Can be merged.

We need to make sure that this possibility gets its way into the documentation.

[l0gicgate]

@adriansuter

We need to make sure that this possibility gets its way into the documentation.

See slimphp/Slim-Website#411