如何在这段代码中洗牌三个变量 - How to shuffle three variables in this code?

How to shuffle three variables in this code?

本文关键字：变量三个代码段代码 | 更新日期: 2023-09-26

我有一个小问题，我试着做一个在线测试，但我需要洗牌答案1是好答案，2,3是坏答案但总是出现a= 1 b= 2 c= 3我想随机化一下比如a=2 b=3 c=1怎么做呢?

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>';

我尝试数组shuffle $answare_good &answare_badi美元,

下面的代码呢:

$result = mysql_query("SELECT * FROM questions ORDER BY RAND() LIMIT 0,10");
while ($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>';
    }
}

您必须指定复选框的值，以便能够获得选中的答案的值…

也移动到PDO或至少mysqli_*函数，因为mysql_*函数现在已被弃用…

EDIT:还考虑使用radio而不是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(或全部三个)答案，那么checkbox是可以的。

如果您需要使用这些变量，您可以对shuffle进行额外的提取

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

//访问变量

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