//check, if the feedback is open (timeopen, timeclose)
$checktime = time();
if ($feedback->timeopen > $checktime or $feedback->timeclose < $checktime and $feedback->timeclose > 0) {
    // print_simple_box_start('center');
    print_box_start('generalbox boxaligncenter');
    echo '<h2><font color="red">' . get_string('feedback_is_not_open', 'feedback') . '</font></h2>';
    print_continue($CFG->wwwroot . '/course/view.php?id=' . $course->id);
    // print_simple_box_end();
    print_box_end();
    print_footer($course);
    exit;
}
//additional check for multiple-submit (prevent browsers back-button). the main-check is in view.php
$feedback_can_submit = true;
if ($feedback->multiple_submit == 0) {
    if (feedback_is_already_submitted($feedback->id, $courseid)) {
        $feedback_can_submit = false;
    }
}
if ($feedback_can_submit) {
    //preserving the items
    if ($preservevalues == 1) {
        if (!$SESSION->feedback->is_started == true) {
            error('error', $CFG->wwwroot . '/course/view.php?id=' . $course->id);
        }
        //checken, ob alle required items einen wert haben
        if (feedback_check_values($_POST, $startitempos, $lastitempos)) {
            $userid = $USER->id;
            //arb
            if ($completedid = feedback_save_values($_POST, $USER->id, true)) {
                if ($userid > 0) {

/**
 * Checks if current user is able to view feedback on this course.
 *
 * @param stdClass $feedback
 * @param context_module $context
 * @param int $courseid
 * @return bool
 */
function feedback_can_view_analysis($feedback, $context, $courseid = false)
{
    if (has_capability('mod/feedback:viewreports', $context)) {
        return true;
    }
    if (intval($feedback->publish_stats) != 1 || !has_capability('mod/feedback:viewanalysepage', $context)) {
        return false;
    }
    if (!isloggedin() || isguestuser()) {
        // There is no tracking for the guests, assume that they can view analysis if condition above is satisfied.
        return $feedback->course == SITEID;
    }
    return feedback_is_already_submitted($feedback->id, $courseid);
}