Yii2 website to production

It's really easy,

Just change this 2 row:

defined('YII_DEBUG') or define('YII_DEBUG', true);
defined('YII_ENV') or define('YII_ENV', 'dev');

to:

defined('YII_DEBUG') or define('YII_DEBUG', false);
defined('YII_ENV') or define('YII_ENV', 'production');

in web/index.php for basic template

In frontend/web/index.php and backend/web/ndex.php for advanced template