ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in codeigniter

Question

I'm using CI 3.1.10.In the index.php file i use development enviroment.

MY controller

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When i try to access the test class then it show me this error

This is the image that show me the warning.

Screenshot of the error is attached

Answer 1

ob_start();

on the first line of index.php in root directory. This works.