Feedback

How to modify add tracking feedback? help~~~

/* {{{
* v 0 add tracking. path:course/lib.php
*/
$showLog = true;
switch ($mod->module) {
case 12: //resource
$time = get_field('log', 'MAX(time)', 'userid', $USER->id, 'cmid', $mod->id);
break;
case 11: //quiz
$time = get_field('quiz_attempts', 'MAX(timefinish)', 'userid', $USER->id, 'quiz', $mod->instance);
break;
case 6: //feedback
$time = get_field('feedback_item', 'MAX(timemodified)', 'userid', $USER->id, 'feedbackid', $mod->instance);
break;
default:
$showLog = false;
}
if ($showLog) {
$logStr = get_string('timecompleted', 'quiz');
$timeStr = $time
? strftime('%Y-%m-%d', $time)
: '<span style="color:#FF6600">'.get_string('unfinished').'</span>';
echo " <span>﹝{$logStr}: {$timeStr}﹞</span>";
}
//}}}