index.php

<?php
// Valid PHP Version?
$minPHPVersion = '7.3';
if (phpversion() < $minPHPVersion)
{
	die("Your PHP version must be {$minPHPVersion} or higher to run CodeIgniter. Current version: " . phpversion());
}
unset($minPHPVersion);

// Path to the front controller (this file)
define('FCPATH', __DIR__ . DIRECTORY_SEPARATOR);
define('HDZ_PATH', FCPATH.'hdz'.DIRECTORY_SEPARATOR);
define('HDZ_VERSION', '2.0.2');

/*
 *---------------------------------------------------------------
 * BOOTSTRAP THE APPLICATION
 *---------------------------------------------------------------
 * This process sets up the path constants, loads and registers
 * our autoloader, along with Composer's, loads our constants
 * and fires up an environment-specific bootstrapping.
 */

// Ensure the current directory is pointing to the front controller's directory
chdir(__DIR__);

// Load our paths config file
require realpath(HDZ_PATH . 'app/Config/Paths.php') ?: HDZ_PATH . 'app/Config/Paths.php';
// ^^^ Change this if you move your application folder

$paths = new Config\Paths();

// Location of the framework bootstrap file.
$bootstrap = rtrim($paths->systemDirectory, '\\/ ') . DIRECTORY_SEPARATOR . 'bootstrap.php';
$app       = require realpath($bootstrap) ?: $bootstrap;

/*
 *---------------------------------------------------------------
 * LAUNCH THE APPLICATION
 *---------------------------------------------------------------
 * Now that everything is setup, it's time to actually fire
 * up the engines and make this app do its thang.
 */
$app->run();