PHPExiftool\PHPExiftoolServiceProvider::register PHP Method

    public function register(Application $app)
    {
        $app['exiftool.logger'] = $app->share(function () {
            $logger = new Logger('Exiftool Logger');
            $logger->pushHandler(new NullHandler());
            return $logger;
        });
        $app['exiftool.processor'] = $app->share(function (Application $app) {
            return new Exiftool($app['exiftool.logger']);
        });
        $app['exiftool.reader'] = $app->share(function (Application $app) {
            return new Reader($app['exiftool.processor'], new RDFParser());
        });
        $app['exiftool.writer'] = $app->share(function (Application $app) {
            return new Writer($app['exiftool.processor']);
        });
        $app['exiftool.preview-extractor'] = $app->share(function (Application $app) {
            return new PreviewExtractor($app['exiftool.processor']);
        });
    }