Autoload PHP

<?php
include_once 'config/Constantes.php';

function loadConfig($className) {
    $filename = APPPATH . 'config/' . $className . '.php';
    if (is_readable($filename)) {
        require $filename;
    }
}

function loadCore($className) {
    $filename = APPPATH . 'core/' . $className . '.php';
    if (is_readable($filename)) {
        require $filename;
    }
}

spl_autoload_register('loadConfig');
spl_autoload_register('loadCore');