Created: 2014-05-19 10:41
Updated: 2015-03-26 15:08
License: mit


Silex Service Provider for the PHP-DI Dependency Injection Container. It does not replace Silex's default DI container Pimple, but rather adds the extra functionality PHP-DI offers.


This library is available on Packagist. To include it using Composer, add the following to your composer.json:

"require": {
	"thispagecannotbefound/silex-php-di": "*"


Assuming $app is a Silex Application instance:

$app->register(new ThisPageCannotBeFound\Silex\Provider\PhpDiServiceProvider(), array(
	'di.definitions' => '/path/to/config.php',


The following parameters are available. Non are required.

  • di.definitions: (array of) path(s) of your PHP-DI injection definitions.
  • di.options: array of options:
    • cache: Enables the use of a cache for the definitions. Must be a Doctrine\Common\Cache\Cache instance. Defaults to null.
    • container_class: Name of the container class, used to create the DI container. Defaults to DI\Container.
    • useAnnotations: Enable or disable the use of annotations to guess injections. Defaults to true.
    • useAutowiring: Enable or disable the use of autowiring to guess injections. Defaults to true.
    • writeProxiesToFile: If true, write the proxies to disk to improve performances. Defaults to false.
    • proxyDirectory: Directory where to write the proxies. Defaults to null.
    • silexAliases: Add aliases for common Silex services. Defaults to true. (see below)
    • injectOnControllers: Fulfill controller dependencies after it has been resolved. Defaults to true. (see below)

Please refer to the official documentation for more information on container configuration.


This adds aliases for some common Silex service providers, for example:

return array (
	'Doctrine\DBAL\Connection' => \DI\link('db'),

This means that when your class requests a Doctrine\DBAL\Connection injection, it will get the same value as when requesting $app['db'], which is the default defined in Silex's DoctrineServiceProvider.


If you organize your controllers in classes, enabling this option will fulfill the dependencies of your controller instance. This is achieved by replacing the default Silex controller resolver with this provider's PhpDiControllerResolver.


The provider exposes the following services:

  • di: The dependency injection container, instance of Acclimate's CompositeContainer. (see "Acclimate" section below)
  • di.raw: Instance of the wrapped DI\Container instance. (see "Acclimate" section below)
  • di.builder: The DI\ContainerBuilder instance, allowing you to further configure or replace the builder.

Acclimate (container interoperability)

This Service Provider uses Acclimate, as suggested by the PHP-DI docs, to allow for PHP-DI and Silex's Pimple to work together. This is manifested through Acclimate's CompositeContainer. The way it is configured will make values defined by PHP-DI have a higher priority. Consider the following:


// contents of definitions file, e.g. config.php

return array(
	'foo' => 'bar'

// example Silex app, e.g. app.php (continuing from registration as demonstrated above)

$app['foo'] = 'baz'; // set Pimple value

$value = $app['di']->get('foo'); // the returned value will be "bar"

If the definitions file (config.php) would not have had an entry for "foo", the result would have been "baz".

Also, this means that $app['di'] actually returns the generated CompositeContainer instance. If, for some reason, you need to access the PHP-DI container, you can do so through $app['di.raw'].

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