index.php

<?php
error_reporting(E_ALL);
ini_set('error_reporting', E_ALL);
header ('Content-type:text/html; charset=utf-8');

require 'vendor/autoload.php';

spl_autoload_register(function ($class_name)
{
    // Define an array of directories in the order of their priority to iterate through.
    $dirs = array(
        'app/',
        'app/framework/core/',
        'app/framework/databases/',
        'app/framework/exceptions/',
        'app/framework/services/',
        'controller/',
        'entity/',
        'model/',
        'services/'
    );

    // Looping through each directory to load all the class files. It will only require a file once.
    // If it finds the same class in a directory later on, IT WILL IGNORE IT! Because of that require once!
    foreach ($dirs as $dir)
    {
        if (file_exists($dir . $class_name . '.php'))
        {
            require_once($dir . $class_name . '.php');
            return;
        }
    }
});

try
{
    Kernel::getInstance()->response();
}
catch (Exception $e)
{
    $e = new TraceableException($e);
    Kernel::getInstance()->showException($e);
}