Question

我有一点问题，我尝试进行在线测试，但我需要对answare进行洗牌 1是好的answare和2,3坏，但所有时间出现a = 1 b = 2 c = 3我想要随机化的东西，如a = 2 b = 3 c = 1我怎么能这样做？

代码在这里：

$result = mysql_query( "SELECT * FROM questions ORDER BY RAND() LIMIT 0,10");
while ($row = mysql_fetch_array($result)) {
    $rows[] = $row;
    $question_id = $row['question_id'];
    $question = $row['question'];
    $answare_good = $row['answare_good'];
    $answare_badi = $row['answare_badi'];
    $answare_badii = $row['answare_badii'];
    $number += 1;
    echo '<tr>
    <td rowspan="3" width="10">'.$number.'</td>
    <td rowspan="3" width="70%"><p>'.$question.'</p></td>
    <td width="30%" height="33%"><input type="checkbox" name="a1" id="a1">
    '.$answare_good.'</td>
    </tr>
    <tr>
    <td width="30%" height="33%"><input type="checkbox" name="a2" id="a2">
    '.$answare_badi.'</td>
    </tr>
    <tr>
    <td  width="30%" height="33%"><input type="checkbox" name="a3" id="a3">
    '.$answare_badii.'</td>
    </tr>';

我尝试了一些数组shuffle $ answare_good＆amp; $ answare_badi＆amp; $ answare_badii但是我很想。

Answer 1

这段代码怎么样：

$result = mysql_query("SELECT * FROM questions ORDER BY RAND() LIMIT 0,10");
while ($row = mysql_fetch_array($result)) {
    $rows[] = $row;
    $question_id = $row['question_id'];

    $answers = array(
        array('a1', 'val1', $row['answare_good']),
        array('a2', 'val2', $row['answare_badi']),
        array('a3', 'val3', $row['answare_badii']),
    );
    shuffle($answers);

    $number += 1;

    echo '<tr>
    <td rowspan="3" width="10">'.$number.'</td>
    <td rowspan="3" width="70%"><p>'.$row['question'].'</p></td></tr>';
    foreach($answers as $answer) {
        echo '<tr><td width="30%" height="33%"><input type="checkbox" name="'.$answer[0].'" id="'.$question_id.'-'.$answer[0].'" value="'.$answer[1].'" />'.$answer[2].'</td></tr>';
    }
}

您还必须指定复选框的值，以便能够获取已选中答案的值...

同时转移到PDO或至少mysqli_*个函数，因为mysql_*函数现已弃用...

编辑：还要考虑使用radio代替checkbox - 假设用户应该只选择一个答案。如果您想让用户选择多个（或所有三个答案），那么checkbox就可以了。

Answer 2

如果你需要提供变量，你可以另外提取shuffle

$answers = array(
 'opt1' => 'answer1',
 'opt2' => 'answer2',
 'opt3' => 'answer3'
);

shuffle($answers);
extract($answers);

//访问变量

echo $opt1;
echo $opt2;
echo $opt3;

如何在此代码中混洗三个变量？

2 个答案: