选择带有空白文本框的标签

我做了一个从数据库中检索数据的表单。此表单允许您显示来自数据库的学生列表，但问题是我无法正确输入他们的分数。它确实允许插入分数，但不幸的是，它只接受最后一个学生的最后一个分数，并向所有学生输入相同的分数。

这些是我的代码:

形式代码

if ($result->num_rows > 0) { // output data of each row
   while($row = $result->fetch_assoc()) {
    if($row['status']=='p'){

    <form name="result" method="post"> 
    <?php {          //this form will display the set of students
            echo $row['lastname'] . ', ' . $row['firstname'];
            echo '<input type="hidden" name="selected[]" value="'.$row['reviewee_idnumber'].'"/>'; ?>
            <input type="text" name="score" required="required" size="20" placeholder="Score"/><br><br>
    <?php   echo '</br>';
        }

    } //if statement
    } //while statement
    ?>
<input type="submit" name="submit" value="Submit"/>
<input type="hidden" name="code" value="<?php echo $code;?>"/>
<input type="hidden" name="subject" value="<?php echo $subject;?>"/>
<input type="hidden" name="items" value="<?php echo $items;?>"/>
<input type="hidden" name="date" value="<?php echo $date;?>"/>
</form>

这是我插入代码到数据库的地方

if(isset($_POST['submit'])){

$code = $_POST['code'];
$subject = $_POST['subject'];
$items = $_POST['items'];
$date = $_POST['date'];
$score = $_POST['score']; //get score
$update = mysql_query("INSERT INTO exam (exam_code, subject, date, total_item)
                                    VALUE ('$code','$subject', '$date', '$items')"); 

if(!empty($_POST['selected'])) {       
    $checked_count = count($_POST['selected']);// Counting number of checked checkboxes.
    //echo "You have selected following ".$checked_count." option(s): <br/>"; 
    foreach($_POST['selected'] as $selected){  // Loop to store and display values of individual inputs.
         $updatedata="INSERT INTO result (score, exam_code, reviewee_idnumber) 
                                    VALUE ('$score', '$code', '$selected')";

            if(@mysql_query($updatedata,$dbc)){
                print '<p> successful!</p>';  
            }else{
                print '<p> failed. '.mysql_error().'</p>';
            } 

它应该显示学生列表(这是好的)，并且在他们的名字旁边是一个空格，将接受他们的分数(这不起作用)。