PHP+MySQL을 사용한 온라인 시험 응답의 예

$sql = "select * from quiz order by id asc"; 
$query = mysql_query($sql); 
while ($row = mysql_fetch_array($query)) { 
 $answers = explode('###', $row['answer']); 
 $arr[] = array( 
   'question' => $row['id'] . '、' . $row['question'], 
   'answers' => $answers 
 ); 
} 
$json = json_encode($arr);

$(function(){ 
  $('#quiz-container').jquizzy({ 
    questions: <?php echo $json;?>, //试题信息 
    sendResultsURL: &#39;data.php&#39; //结果处理地址 
  }); 
});

$data = $_REQUEST['an']; 

$answers = explode('|',$data); 
$an_len = count($answers)-1; //题目数 

$sql = "select correct from quiz order by id asc"; 

$query = mysql_query($sql); 
$i = 0; 
$score = 0; //初始得分 
$q_right = 0; //答对的题数 
while($row=mysql_fetch_array($query)){ 
  if($answers[$i]==$row['correct']){ 
    $arr['res'][] = 1; 
    $q_right += 1; 
  }else{ 
    $arr['res'][] = 0; 
  } 
  $i++; 
} 
$arr['score'] = round(($q_right/$an_len)*100); //总得分 
echo json_encode($arr);

CREATE TABLE IF NOT EXISTS `quiz` ( 
 `id` int(11) NOT NULL AUTO_INCREMENT, 
 `question` varchar(100) NOT NULL, 
 `answer` varchar(500) NOT NULL, 
 `correct` tinyint(2) NOT NULL, 
 PRIMARY KEY (`id`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=6 ; 
 
-- 
-- 转存表中的数据 `quiz` 
-- 
 
INSERT INTO `quiz` (`id`, `question`, `answer`, `correct`) VALUES 
(1, '罗马帝国曾一度辉煌，令人神往，故有“条条大陆通罗马”一说。那么，今天你是怎样理解这一谚语的准确含义的？', 'A．入乡随俗 ###B．四通八达 ###C．殊途同归 ###D．流连忘返', 3), 
(2, '找出不同类的一项：', 'A.斑马 ###B.军马 ###C.赛马 ###D.骏马 ###E.驸马', 5), 
(3, ' 蜡烛在空气中燃烧，蜡烛质量逐渐变小。这说明', 'A.物质可以自生自灭###B.发生的不是化学变化###C.不遵守质量守恒定律###D.生成物为气体，散发到空气中了', 4), 
(4, '以下哪位歌手没有获得过《我是歌手》总冠军？', 'A.羽泉###B.韩磊###C.邓紫棋###D.韩红', 3), 
(5, &#39;下列哪个标签不是HTML5中的新标签？&#39;, &#39;A.<article>###B.<canvas>###C.<section>###D.<sub>&#39;, 4);