Devise\Support\Config\FileManager::saveToFile PHP Метод

    public function saveToFile($content, $filename)
    {
        $this->clearCache();
        $configFile = $this->getFileByEnvironment($filename);
        $this->files->put($configFile, '<?php return ' . $this->prettyVarExport($content) . ';');
        return $content;
    }