File: generador/cab/incs/autocargador.php

<?php
function __autoload($classname) {
    
    $directorys = array(
        'modelo/'
    );

    foreach($directorys as $directory)
    {
        if(file_exists($directory.$classname . '.php'))
        {
            $full_file = $directory.$classname . '.php';
            
            require_once($full_file);
            return;
        }            
    }
}