chamilo-lms/main/survey/generate_link.php

<?php

$language_file = 'survey';
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($suvrey_id)) {
    api_not_allowed(true);
}
$survey_data = survey_manager::get_survey($survey_id);

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

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

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

$link = survey_manager::generate_survey_link($survey_id, api_get_course_int_id(), api_get_session_id(), api_get_group_id());
echo '<div class="row">';
    echo '<div class="span12" style="text-align:center">';
    echo Display::url(get_lang('GenerateSurveyLink'), $link, array('class' => 'btn btn-primary btn-large'));
    echo '</div>';
    echo '<div class="span12">';
    echo get_lang('GenerateSurveyLinkExplanation');

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

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