How to add custom config file to app/config in Laravel 5?

You can easily add a new file to the config folder. This file should return configuration values. Check other config files for reference. Say constants.php is like so

<?php

return array(
    'pagination' => array(
           'items_per_page' => 10
    ),
);

You can now access this config file from anywhere by either using the Config Facade or the config() global function like so

Config::get('constants.pagination.items_per_page');

or

config('constants.pagination.items_per_page');

i.e.

config('file_name.variable_name');