codeigniter 4 "need define" in the model this data output->set_header

In my opinion. 
If you set headers in the model, then you are doing something wrong.
The controller should be responsible for setting the headers.

Up

PHP Code:

// In controller 
$this->response->setHeader('Pragma', 'no-cache'); 

//If you still want to do this in the model
Service::response()->setHeader('Pragma', 'no-cache'); 


https://codeigniter.com/user_guide/outgo...ng-headers

This would also be valid for calls from controllers or bookries, I simply consult because due to the great diversity there are many forms of calls, but the most appropriate ones would be great.

Example wants to set this from a helper, a library.

PHP Code:

//If you still want to do this in the model
Service::response()->setHeader('Pragma', 'no-cache'); 


I clarify this code is the one that works apparently in BaseController:

PHP Code:

$this->response = \Config\Services::response()->setHeader('Pragma', 'no-cache'); 


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