Symfony\Bundle\ZendBundle\DependencyInjection\ZendExtension::registerLoggerConfiguration PHP Method

    protected function registerLoggerConfiguration($config, ContainerBuilder $container)
    {
        $config = $config['logger'];

        if (!$container->hasDefinition('zend.logger')) {
            $loader = new XmlFileLoader($container, __DIR__.'/../Resources/config');
            $loader->load('logger.xml');
            $container->setAlias('logger', 'zend.logger');
        }

        if (isset($config['priority'])) {
            $container->setParameter('zend.logger.priority', is_int($config['priority']) ? $config['priority'] : constant('\\Zend\\Log\\Logger::'.strtoupper($config['priority'])));
        }

        if (isset($config['path'])) {
            $container->setParameter('zend.logger.path', $config['path']);
        }

        if (isset($config['log_errors'])) {
            $definition = $container->findDefinition('zend.logger');
            if (false === $config['log_errors'] && $definition->hasMethodCall('registerErrorHandler')) {
                $container->findDefinition('zend.logger')->removeMethodCall('registerErrorHandler');
            }
            else {
                $container->findDefinition('zend.logger')->addMethodCall('registerErrorHandler');
            }
        }
    }