iflrandevu/application/helpers/config_helper.php

<?php defined('BASEPATH') or exit('No direct script access allowed');

/* ----------------------------------------------------------------------------
 * Easy!Appointments - Open Source Web Scheduler
 *
 * @package     EasyAppointments
 * @author      A.Tselegidis <alextselegidis@gmail.com>
 * @copyright   Copyright (c) 2013 - 2020, Alex Tselegidis
 * @license     http://opensource.org/licenses/GPL-3.0 - GPLv3
 * @link        http://easyappointments.org
 * @since       v1.3.0
 * ---------------------------------------------------------------------------- */

/**
 * Quickly fetch the value of a framework configuration.
 *
 * @param string $key Configuration key.
 * @param mixed $default Default value in case the requested config has no value.
 *
 * @return mixed Returns the configuration value.
 */
function config($key, $default = NULL)
{
    $CI = &get_instance();

    $value = $CI->config->item($key);

    return $value ?? $default;
}