chamilo-lms2/main/inc/ajax/gradebook.ajax.php

<?php
/* For licensing terms, see /license.txt */
/**
 * Responses to AJAX calls
 */

require_once __DIR__.'/../global.inc.php';

api_protect_course_script(true);

$action = $_REQUEST['a'];

switch ($action) {
    case 'get_gradebook_weight':
        if (api_is_allowed_to_edit(null, true)) {
            $cat_id = $_GET['cat_id'];
            $cat = Category :: load($cat_id);
            if ($cat && isset($cat[0])) {
                echo $cat[0]->get_weight();
            } else {
                echo 0;
            }
        }
        break;
    default:
        echo '';
        break;
}
exit;