How to check the version of Yii(dev or prod)?

How can I be sure that the version of Yii I am using is not a development but a production?

Check what is the value of YII_DEBUG.

Here is what index contains:

// comment out the following two lines when deployed to production

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

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

So all I need is to do what the commented line says to make it a production version?


Or just change to

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

defined('YII_ENV') or define('YII_ENV', 'prod');