PHP warning not logged in production env

I recently stepped in a real problem that I can't overcome. Whenever I switch my application from development mode to production mode, CI4 stops logging my PHP warning.

For example this code : 

PHP Code:

$bar = 20;
echo $foo; 


Should throw a warning Undefined variable $foo

Everything's alright in my development environment with this log : 

Code:

CRITICAL - 2021-03-01 08:44:52 --> Undefined variable: foo

But nothing happens if I switch to CI_ENVIRONMENT = production. Warning is bypassed and not logged.

I tried to switch the $threshold variable in app/Config/Logger.php to 5 or 9 or even an array of different values but it doesn't change anything.

Did you witness such a behavior in your app? Should I open an issue in GitHub or am I missing something here?

You have to change the boot file.

See https://github.com/codeigniter4/CodeIgni...on.php#L11

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

You have to change the boot file.

See https://github.com/codeigniter4/CodeIgni...on.php#L11

Thank you it worked well
However I don't find any mention of this in the documentation, might be a little PR coming in.

Yes, probably this is undocumented.

There is a short description about boot files,
https://codeigniter4.github.io/CodeIgnit...boot-files
but it might be better that the logging page has a note about this.

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper