stripEmptyFiles example

$form->addError(new FormError(
                    $form->getConfig()->getOption('upload_max_size_message')(),
                    null,
                    ['{{ max }}' => $this->serverParams->getNormalizedIniPostMaxSize()]
                ));

                return;
            }

            $fixedFiles = [];
            foreach ($_FILES as $fileKey => $file) {
                $fixedFiles[$fileKey] = self::stripEmptyFiles(self::fixPhpFilesArray($file));
            }

            if ('' === $name) {
                $params = $_POST;
                $files = $fixedFiles;
            } elseif (\array_key_exists($name, $_POST) || \array_key_exists($name, $fixedFiles)) {
                $default = $form->getConfig()->getCompound() ? [] : null;
                $params = \array_key_exists($name, $_POST) ? $_POST[$name] : $default;
                $files = \array_key_exists($name, $fixedFiles) ? $fixedFiles[$name] : $default;
            } else {
                // Don't submit the form if it is not present in the request