<?php
    require('../../config.php');
    //require_once('lib.php');

    $id = required_param('id', PARAM_INT);
    list ($course, $cm) = get_course_and_cm_from_cmid($id, 'certificate');
    $certificate = $DB->get_record('certificate', array('id'=> $cm->instance), '*', MUST_EXIST);