Symfony\Component\DependencyInjection\Dumper\PhpDumper::doExport PHP 메소드

    private function doExport($value)
    {
        $export = var_export($value, true);

        if ("'" === $export[0] && $export !== $resolvedExport = $this->container->resolveEnvPlaceholders($export, "'.\$this->getEnv('%s').'")) {
            $export = $resolvedExport;
            if ("'" === $export[1]) {
                $export = substr($export, 3);
            }
            if (".''" === substr($export, -3)) {
                $export = substr($export, 0, -3);
            }
        }

        return $export;
    }