Lazy controller factory that auto-injects dependencies based on controller params.

LazyControllerFactory.php

<?php

class LazyControllerFactory implements AbstractFactoryInterface
{

    /**
     * Determine if we can create a service with name
     *
     * @param ServiceLocatorInterface $serviceLocator
     * @param                         $name
     * @param                         $requestedName
     *
     * @return bool
     */
    public function canCreateServiceWithName(ServiceLocatorInterface $serviceLocator, $name, $requestedName)
    {
        list( $module, ) = explode( '\\', __NAMESPACE__, 2 );
        return strstr( $requestedName, $module . '\Controller') !== false;
    }


    /**
     * These aliases work to substitute class names with SM types that are buried in ZF
     * @var array
     */
    protected $aliases = [
        'Zend\Form\FormElementManager' => 'FormElementManager',
        'Zend\Validator\ValidatorPluginManager' => 'ValidatorManager',
        'Zend\Mvc\I18n\Translator' => 'translator',
    ];

    /**
     * Create service with name
     *
     * @param ServiceLocatorInterface $serviceLocator
     * @param                         $name
     * @param                         $requestedName
     *
     * @return mixed
     */
    public function createServiceWithName(ServiceLocatorInterface $serviceLocator, $name, $requestedName)
    {
        $class = new \ReflectionClass($requestedName);
        $parentLocator = $serviceLocator->getServiceLocator();
        if( $constructor = $class->getConstructor() )
        {
            if( $params = $constructor->getParameters() )
            {
                $parameter_instances = [];
                foreach( $params as $p )
                {

                    if( $p->getClass() ) {
                        $cn = $p->getClass()->getName();
                        if (array_key_exists($cn, $this->aliases)) {
                            $cn = $this->aliases[$cn];
                        }

                        try {
                            $parameter_instances[] = $parentLocator->get($cn);
                        }
                        catch (\Exception $x) {
                            echo __CLASS__
                                . " couldn't create an instance of $cn to satisfy the constructor for $requestedName.";
                            exit;
                        }
                    }
                    else{
                        if( $p->isArray() && $p->getName() == 'config' )
                            $parameter_instances[] = $parentLocator->get('config');
                    }

                }
                return $class->newInstanceArgs($parameter_instances);
            }
        }

        return new $requestedName;

    }
}