InputFilterFactoryFactory.php

<?php
namespace My\App;

use Zend\Filter\FilterChain;
use Zend\InputFilter\Factory;
use Zend\ServiceManager\FactoryInterface;
use Zend\ServiceManager\ServiceLocatorInterface;
use Zend\Validator\ValidatorChain;

/**
 * This allows for defining new userland input filters via Module::getInputFilterConfig() or config files.
 * 
 * In your module config add the following:
 * [
 *      // define your custom filters here
 *     'input_filter' => [
 *         'somefilter' => 'My\App\Filter\SomeFilter'
 *     ],
 *  
 *     // Make sure to register the factory in your config::    
 *     'service_manager' => [
 *         'factories' = [
 *              'Zend\InputFilter\Factory'     => 'My\App\InputFilterFactoryFactory',
 *          ]
 *     ]
 * ]
 * 
 * Now you can use the factory in your code:
 * $inputFilter = new InputFilter();
 * $inputFilter->setFactory($serviceLocator->get('Zend\InputFilter\Factory'));
 * $inputFilter->add('name', 'stringtrim');
 * 
 */
class InputFilterFactoryFactory implements FactoryInterface
{
    public function createService(ServiceLocatorInterface $serviceLocator, $canonicalName = null, $requestedName = null)
    {
        $factory = new Factory();
        $factory->setDefaultFilterChain(new FilterChain());
        $factory->setDefaultValidatorChain(new ValidatorChain());
        $factory->setInputFilterManager($serviceLocator->get('InputFilterManager'));
        return $factory;
    }
}