Modules\SystemInstaller\Module::installSystem PHP Method

    protected function installSystem($arParams)
    {
        $arConfig = [];
        $dbConfig = [];
        if ($arParams['dbType'] == 'mysql') {
            $dbConfig[$arParams['dbType']] = ['driver' => $arParams['dbType'], 'host' => $arParams['dbHost'], 'database' => $arParams['dbName'], 'username' => $arParams['dbLogin'], 'password' => $arParams['dbPassword'], 'charset' => 'utf8', 'collation' => 'utf8_general_ci', 'prefix' => ''];
        } elseif ($arParams['dbType'] == 'sqlite') {
            $file = RESOURCE_PATH . 'database/' . strtolower($arParams['dbFileName']) . '.sqlite';
            FileWorker::saveFile($file, '');
            $dbConfig[$arParams['dbType']] = ['driver' => $arParams['dbType'], 'database' => $file, 'prefix' => ''];
        }
        $arConfig['db'] = $dbConfig;
        $arConfig['slim']['settings'] = ['db_driver' => $arParams['dbType'], 'displayErrorDetails' => $arParams['displayErrorDetails'], 'debug' => $arParams['debug'], 'use_log' => $arParams['use_log'], 'log_system' => $arParams['log_system'], 'log_filename' => 'app.log', 'register_log' => $arParams['register_log'], 'determineRouteBeforeAppMiddleware' => true, 'protect_double_route_register' => true];
        $arConfig['view'] = ['template_path' => APP_PATH . 'templates', 'twig' => ['cache' => CACHE_PATH . 'twig', 'debug' => $arParams['debug'], 'auto_reload' => $arParams['debug']]];
        $arConfig['cache'] = array('cache.default' => 'files', 'cache.stores.files' => array('driver' => 'file', 'path' => CACHE_PATH . 'slimcms'));
        FileWorker::savePhpReturnFile(APP_PATH . 'config/local/autoconfig.php', $arConfig);
        $this->registerDB($dbConfig[$arParams['dbType']]);
        if (isset($this->specialData['coreClassName']) && class_exists($this->specialData['coreClassName'])) {
            $cl = $this->specialData['coreClassName'];
            ModuleLoader::install(new $cl());
        } else {
            ModuleLoader::install(new \Modules\Core\Module());
        }
        if ($arParams['modules'] && is_array($arParams['modules'])) {
            foreach ($arParams['modules'] as $module) {
                $cl = '\\Modules\\' . $module . '\\Module';
                if (class_exists($cl)) {
                    ModuleLoader::install(new $cl());
                }
            }
        }
    }