chamilo-lms/main/survey/generate_link.php

<?php
/* For licensing terms, see /license.txt */

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

if (!api_is_allowed_to_edit(false, true)) {
    api_not_allowed(true);
}

$survey_id = isset($_REQUEST['survey_id']) ? intval($_REQUEST['survey_id']) : null;

if (empty($survey_id)) {
    api_not_allowed(true);
}

$survey_data = SurveyManager::get_survey($survey_id);

$interbreadcrumb[] = array(
    'url' => api_get_path(WEB_CODE_PATH).'survey/survey_list.php',
    'name' => get_lang('SurveyList'),
);
$interbreadcrumb[] = array(
    'url' => api_get_path(WEB_CODE_PATH).'survey/survey.php?survey_id='.$survey_id,
    'name' => strip_tags($survey_data['title']),
);

Display::display_header(get_lang('Survey'), 'Survey');

if (!SurveyManager::survey_generation_hash_available()) {
    api_not_allowed(true);
}

$link = SurveyManager::generate_survey_link(
    $survey_id,
    api_get_course_int_id(),
    api_get_session_id(),
    api_get_group_id()
);
echo '<div class="row">';
    echo '<div class="col-md-12">';
    echo Display::url(get_lang('GenerateSurveyAccessLink'), $link, array('class' => 'btn btn-primary btn-large'));
    echo '</div>';
    echo '<div class="col-md-12">';
    echo get_lang('GenerateSurveyAccessLinkExplanation');

    echo '<pre>';
    echo  $link;
    echo '</pre>';

    echo '</div>';
echo '</div>';