thinkphp - TP3.1.3 framework configuration cannot be changed, the configuration will be read from ~runtime.php

Question

TP3.1.3 framework configuration cannot be changed, the configuration will be read from ~runtime.php

Answer 1

index.php won’t set cache files if debug is turned on, right?

Answer 2

Add in index.php:
define('APP_DEBUG',True);// Turn on debugging mode. It is recommended to turn it on during the development stage. Comment or set it to false during the deployment stage