C:/xampp/htdocs/moodle/mod/workshop/aggregate.php

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<?php

// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

require_once(dirname(dirname(dirname(__FILE__))).'/config.php');
require_once(dirname(__FILE__).'/locallib.php');

$cmid       = required_param('cmid', PARAM_INT);            // course module
$confirm    = optional_param('confirm', false, PARAM_BOOL); // confirmation

// the params to be re-passed to view.php
$page       = optional_param('page', 0, PARAM_INT);
$sortby     = optional_param('sortby', 'lastname', PARAM_ALPHA);
$sorthow    = optional_param('sorthow', 'ASC', PARAM_ALPHA);

$cm         = get_coursemodule_from_id('workshop', $cmid, 0, false, MUST_EXIST);
$course     = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
$workshop   = $DB->get_record('workshop', array('id' => $cm->instance), '*', MUST_EXIST);
$workshop   = new workshop($workshop, $cm, $course);

$PAGE->set_url($workshop->aggregate_url(), compact('confirm', 'page', 'sortby', 'sorthow'));

require_login($course, false, $cm);
require_capability('mod/workshop:overridegrades', $PAGE->context);

// load and init the grading evaluator
$evaluator = $workshop->grading_evaluation_instance();
$settingsform = $evaluator->get_settings_form($PAGE->url);

if ($settingsdata = $settingsform->get_data()) {
    $workshop->aggregate_submission_grades();           // updates 'grade' in {workshop_submissions}
    $evaluator->update_grading_grades($settingsdata);   // updates 'gradinggrade' in {workshop_assessments}
    $workshop->aggregate_grading_grades();              // updates 'gradinggrade' in {workshop_aggregations}
    $workshop->log('update aggregate grades');
}

redirect(new moodle_url($workshop->view_url(), compact('page', 'sortby', 'sorthow')));