Symfony\Component\HttpKernel\HttpCache\HttpCache::restoreResponseBody PHP Method

    private function restoreResponseBody(Request $request, Response $response)
    {
        if ($request->isMethod('HEAD') || 304 === $response->getStatusCode()) {
            $response->setContent(null);
            $response->headers->remove('X-Body-Eval');
            $response->headers->remove('X-Body-File');
            return;
        }
        if ($response->headers->has('X-Body-Eval')) {
            ob_start();
            if ($response->headers->has('X-Body-File')) {
                include $response->headers->get('X-Body-File');
            } else {
                eval('; ?>' . $response->getContent() . '<?php ;');
            }
            $response->setContent(ob_get_clean());
            $response->headers->remove('X-Body-Eval');
            if (!$response->headers->has('Transfer-Encoding')) {
                $response->headers->set('Content-Length', strlen($response->getContent()));
            }
        } elseif ($response->headers->has('X-Body-File')) {
            $response->setContent(file_get_contents($response->headers->get('X-Body-File')));
        } else {
            return;
        }
        $response->headers->remove('X-Body-File');
    }