The most important constants to set as a developer

Earlier, we saw in the initialization process that all the constants are defined in /config/config.inc.php. This file includes /config/defines_custom.inc.php if it exists.

If you need to set custom constants, /config/defines_custom.inc.php is a good place to put their definitions.

We also saw that the /config/defines.inc.php file was also included in the /config/config.inc.php file. Two very useful constants to set are the following:

• _PS_MODE_DEV_: If you set it to true, it will enable the debug mode for the whole shop. Inside Symfony controllers, you can use the awesome profiler.

Important note

All warnings, notices, and errors will be displayed. Do not use the debug mode in production if you want to keep your user experience safe. It is useful for developers but not for your customers! If you want to disable it, you have to set it to false.

• _PS_DEBUG_PROFILING_: If you set it to true, you will get...