The expression `CRM_Core_BAO_Setting::DEVELOPER_PREFERENCES_NAME` does not
work within `civicrm.settings.php` because the classloader has not been
initialized yet. This file is just supposed to store the data needed for
bootstrap.
* NB: defining a value for environment here prevents it from being set
* via the browser.
*/
-// $civicrm_setting[CRM_Core_BAO_Setting::DEVELOPER_PREFERENCES_NAME]['environment'] = 'Production';
+// $civicrm_setting['domain']['environment'] = 'Production';
/**
* Settings to enable external caching using a cache server. This is an