javascript - 我无法检查多个单选按钮

Question

它的问题和四个选项并检查任何一个。 问题当选中按钮到下一个问题时，之前的检查未被选中。

代码如下:

    <form method="post" id="submitme">
    <table class="ques_list" border=1 style="width:100%">
    <?php 
        $result=mysql_query("SELECT * FROM questions ORDER BY RAND() LIMIT 20");
        while ($row = mysql_fetch_array($result)) { ?>
            <tr>
                <td colspan="2"><?php echo $row['ques_title']."<br />"; ?></td>
            </tr>
            <tr>
                <td><input type="radio" name="opt_value" value="1" /><?php echo $row['ques_opt_1']."<br />"; ?></td>
                <td><input type="radio" name="opt_value" value="2" /><?php echo $row['ques_opt_2']."<br />"; ?></td>
            </tr>
            <tr>
                <td><input type="radio" name="opt_value" value="3" /><?php echo $row['ques_opt_3']."<br />"; ?></td>
                <td><input type="radio" name="opt_value" value="4" /><?php echo $row['ques_opt_4']."<br />"; ?></td>
            </tr>
        <?php } ?>
        <tr><td colspan="2"><button type="submit" name="btn-submit" class="btn-submit">Submit</button></td></tr>
    </table>
</form> 

我怎样才能得到他的值(value)？建议我。谢谢。

Answer 1

您可以向单选按钮的名称添加索引。

<form method="post" id="submitme">
    <table class="ques_list" border=1 style="width:100%">
    <?php 
        $result=mysql_query("SELECT * FROM questions ORDER BY RAND() LIMIT 20");
        while ($row = mysql_fetch_array($result)) { ?>
            <tr>
                <td colspan="2"><?php echo $row['ques_title']."<br />"; ?></td>
            </tr>
            <tr>
                <td><input type="radio" name="opt_value_<?php echo $row['ques_id']; ?>" value="1" /><?php echo $row['ques_opt_1']."<br />"; ?></td>
                <td><input type="radio" name="opt_value_<?php echo $row['ques_id']; ?>" value="2" /><?php echo $row['ques_opt_2']."<br />"; ?></td>
            </tr>
            <tr>
                <td><input type="radio" name="opt_value_<?php echo $row['ques_id']; ?>" value="3" /><?php echo $row['ques_opt_3']."<br />"; ?></td>
                <td><input type="radio" name="opt_value_<?php echo $row['ques_id']; ?>" value="4" /><?php echo $row['ques_opt_4']."<br />"; ?></td>
            </tr>
        <?php } ?>
        <tr><td colspan="2"><button type="submit" name="btn-submit" class="btn-submit">Submit</button></td></tr>
    </table>
</form> 

<小时/>

编辑:

然后您可以按如下方式阅读您的答案:
($row['ques_id']对于每个问题都必须是唯一的，并且答案应该是唯一发布的值)

if( $_SERVER['REQUEST_METHOD'] === 'post'){
   foreach( $_POST as $question => $answer ){
       $quest_id = preg_replace( '/[^0-9]/' , '' , $question );

       //make database query to check answer
       //    $quest_id is the question ID 
       //    $answer is number of the selected answer
   }
}