In the application template of yii, there will be these two sentences in the first
<?php
// 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');
When deploying to a production environment, comment out the following two lines, which is what the above comment says.
But everyone who has developed and deployed the environment through teams knows that this means that a manual operation must be performed during deployment. If the operator does not know or forgets this operation, it will be a tragedy.
So why are these two sentences? Or is there any way to avoid tragedy?
The answer is the auto_prepend_file configuration item. In different server environments such as production, testing, etc., define a php script of auto_prepend_file, which defines these two constants:
<?php
define('YII_DEBUG', false);
define('YII_ENV', 'prod');
This script can be predefined in the server image. When opening a new machine, it directly uses this php environment containing the auto_prepend_file script. There will be no tragedy in subsequent schedule maintenance.
The above is why there are these two sentences in the entrance file of Yii that the editor introduced to you. I hope it will be helpful to you. If you have any questions, please leave me a message and the editor will reply to you in time. Thank you very much for your support for my website!