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Class Phalcon\DI

implements Phalcon\DiInterface

Phalcon\DI is a component that implements Dependency Injection of services and it’s itself a container for them. Since Phalcon is highly decoupled, Phalcon\DI is essential to integrate the different components of the framework. The developer can also use this component to inject dependencies and manage global instances of the different classes used in the application. Basically, this component implements the Inversion of Control pattern. Applying this, the objects do not receive their dependencies using setters or constructors, but requesting a service dependency injector. This reduces the overall complexity, since there is only one way to get the required dependencies within a component. Additionally, this pattern increases testability in the code, thus making it less prone to errors.


 $di = new Phalcon\DI();

 //Using a string definition
 $di->set('request', 'Phalcon\Http\Request', true);

 //Using an anonymous function
 $di->set('request', function(){
  return new Phalcon\Http\Request();
 }, true);

 $request = $di->getRequest();


public __construct ()

Phalcon\DI constructor

public Phalcon\DI\ServiceInterface set (string $name, mixed $definition, [boolean $shared])

Registers a service in the services container

public Phalcon\DI\ServiceInterface setShared (string $name, mixed $definition)

Registers an “always shared” service in the services container

public remove (string $name)

Removes a service in the services container

public Phalcon\DI\ServiceInterface attempt (string $name, mixed $definition, [boolean $shared])

Attempts to register a service in the services container Only is successful if a service hasn’t been registered previously with the same name

public Phalcon\DI\ServiceInterface setRaw (string $name, Phalcon\DI\ServiceInterface $rawDefinition)

Sets a service using a raw Phalcon\DI\Service definition

public mixed getRaw (string $name)

Returns a service definition without resolving

public Phalcon\DI\ServiceInterface getService (string $name)

Returns a Phalcon\DI\Service instance

public mixed get (string $name, [array $parameters])

Resolves the service based on its configuration

public mixed getShared (string $name, [array $parameters])

Resolves a service, the resolved service is stored in the DI, subsequent requests for this service will return the same instance

public boolean has (string $name)

Check whether the DI contains a service by a name

public boolean wasFreshInstance ()

Check whether the last service obtained via getShared produced a fresh instance or an existing one

public Phalcon\DI\Service [] getServices ()

Return the services registered in the DI

public boolean offsetExists (string $alias)

Check if a service is registered using the array syntax

public offsetSet (string $alias, mixed $definition)

Allows to register a shared service using the array syntax


$di['request'] = new Phalcon\Http\Request();

public mixed offsetGet (string $alias)

Allows to obtain a shared service using the array syntax



public offsetUnset (string $alias)

Removes a service from the services container using the array syntax

public mixed __call (string $method, [array $arguments])

Magic method to get or set services using setters/getters

public static setDefault (Phalcon\DiInterface $dependencyInjector)

Set a default dependency injection container to be obtained into static methods

public static Phalcon\DiInterface getDefault ()

Return the lastest DI created

public static reset ()

Resets the internal default DI