单选按钮组使用php与其他人分开，而循环不起作用

Question

我正在使用问题页面，每个用户将向他显示 2 个或更多问题每个问题有 4 个答案和 4 个（单选按钮），每个问题必须与其他问题分开，这基本上意味着单选按钮组必须像这样，我的问题就像下面的图片（我不能全部发布）

我用过这个代码（没用）

$sql2 = "SELECT * FROM questions WHERE subject = 'web lang' LIMIT 5 ";
$result2 = mysqli_query($conn,$sql2);

              echo "<form action='' method='POST'>";

                  while ($row2 = mysqli_fetch_array($result2,MYSQLI_ASSOC)) {

                    echo "<div align='center'>
                    <table>

                      <thead>
                      <tr >
                        <th >Q & A</th>
                        <th>Choose</th>
                      </tr>
                      </thead>
                      <tbody>
                      <tr>
                        <td>".$row2['question']."</td>
                        <td></td>
                      </tr>
                      <tr>
                        <td>".$row2['ans1']."</td>
                        <td><input type='radio' name='chk' value='1' >
                      </tr>
                      <tr>
                        <td>".$row2['ans2']."</td>
                        <td><input type='radio' name='chk' value='2' >
                      </tr>
                      <tr>
                        <td>".$row2['ans3']."</td>
                        <td><input type='radio' name='chk' value='3' >
                      </tr>
                      <tr>
                        <td>".$row2['ans4']."</td>
                        <td><input type='radio' name='chk' value='4' >
                      </tr>
                      </tbody>
                    </table><br> <br>
                    </div>
                    ";

                  }
                  echo "<input type='submit' name='submit'>
                  </form>";
                  if (isset($_POST['submit'])) {

                      $chk = $_POST['chk'];

                      Echo $chk;

                  }

即使我这样回应

print_r(array_values($chk));

如果我每次无法获得名称时使用不同的名称，我在 while 循环中使用此代码，它可以工作，但如何获取其他表的值？

$new = 0;
<input type='radio' name='chk".$new."' value='some value' >
$new++;

Answer 1

试试这个：

$sql2 = "SELECT * FROM questions WHERE subject = 'web lang' LIMIT 5 ";
$result2 = mysqli_query($conn,$sql2);

              echo "<form action='' method='POST'>";
               $i=0;
                  while ($row2 = mysqli_fetch_array($result2,MYSQLI_ASSOC)) {

                    echo "<div align='center'>
                    <table>

                      <thead>
                      <tr >
                        <th >Q & A</th>
                        <th>Choose</th>
                      </tr>
                      </thead>
                      <tbody>
                      <tr>
                        <td>".$row2['question']."</td>
                        <td></td>
                      </tr>
                      <tr>
                        <td>".$row2['ans1']."</td>
                        <td><input type='radio' name='chk".$i."' value='1' >
                      </tr>
                      <tr>
                        <td>".$row2['ans2']."</td>
                        <td><input type='radio' name='chk".$i."' value='2' >
                      </tr>
                      <tr>
                        <td>".$row2['ans3']."</td>
                        <td><input type='radio' name='chk".$i."' value='3' >
                      </tr>
                      <tr>
                        <td>".$row2['ans4']."</td>
                        <td><input type='radio' name='chk".$i."' value='4' >
                      </tr>
                      </tbody>
                    </table><br> <br>
                    </div>
                    ";
                   $i++;
                  }
                  echo "<input type='submit' name='submit'>
                  </form>";
                  if (isset($_POST['submit'])) {

                      $chk = $_POST['chk'];

                      Echo $chk;

                  }

Answer 2

假设您有一个与每个问题相关联的 questionID 列，请按以下方式更改您的 while 循环，

// your code
echo "<form action='' method='POST'>";
while ($row2 = mysqli_fetch_array($result2,MYSQLI_ASSOC)) {
    ?>
    <div align='center'>
    <table>
        <thead>
            <tr >
                <th >Q & A</th>
                <th>Choose</th>
            </tr>
        </thead>
        <tbody>
            <tr>
                <td><?php echo $row2['question']; ?></td>
                <td></td>
            </tr>
            <tr>
                <td><?php echo $row2['ans1']; ?></td>
                <td><input type='radio' name='chk[<?php echo $row2['quesrtionID']; ?>]' value='1' >
            </tr>
            <tr>
                <td><?php echo $row2['ans2']; ?></td>
                <td><input type='radio' name='chk[<?php echo $row2['quesrtionID']; ?>]' value='2' >
            </tr>
            <tr>
                <td><?php echo $row2['ans3']; ?></td>
                <td><input type='radio' name='chk[<?php echo $row2['quesrtionID']; ?>]' value='3' >
            </tr>
            <tr>
                <td><?php echo $row2['ans4']; ?></td>
                <td><input type='radio' name='chk[<?php echo $row2['quesrtionID']; ?>]' value='4' >
            </tr>
        </tbody>
    </table>
    <br> <br>
    </div>
    <?php
}
echo "<input type='submit' name='submit'>
</form>";
// your code

稍后当用户选择单选选项并点击提交按钮时，通过以下方式获取问题 ID 和相应的（给定）答案，

if (isset($_POST['submit'])) {
    foreach($_POST['chk'] as $questionID => $answer){
        // $questionID is the question ID and $answer is
        // the corresponding given answer of that quesrtion
    }
}