Php 如何使用选项标记更新sql中的多行

我需要用一次提交来更新mysql表中的多行，而老师可以给每个学生评分并一次保存所有行

有人能用正确的方法帮忙吗

此代码仅记录最后一行

<form class="multisteps-form__form clearfix" action="?do=Update" method="post" id="wizard">
                        <div class="multisteps-form__panel js-active" data-animation="slideVert">
                          <?php
                   $stmt = $con->prepare("SELECT * FROM student  ");
                   $stmt->execute();
                   $rows = $stmt->fetchAll();
                     foreach($rows as $row) { 
                          $id = $row['id'];
                         $math_activity = $row['math_activity'];
                         $math_attendance = $row['math_attendance'];
                          $math_evaluation = $row['math_evaluation'];
                        ?>             
                    <input type="hidden" name="id[]" value="<?php echo $id ?>" />
                                    <div class="row">
                                        <div class="col-md-2">
                                    <div class="badge-selection">
                                        <h3><?php echo $row['student_name']; ?></h3></div></div>
                                    <div class="col-md-3">
                                            <div class="n-select-option">
                                                <select name="math_activity">
                                                    <option>Activity</option>
                                                    <option  name="2" value="25">25</option>
                                                    <option  name="3" value="50">50</option>
                                                </select></div></div>
                                       <div class="col-md-3">
                                            <div class="n-select-option">
                                                <select name="math_attendance">
                                                    <option>Attendance</option>
                                                    <option  name="2" value="25">25</option>
                                                    <option  name="3" value="50">50</option>
                                                </select></div></div>
                                        <div class="col-md-3">
                                            <div class="n-select-option">
                                                <select name="math_evaluation">
                                                    <option>Evaluation</option>
                                                    <option  name="2" value="25">25</option>
                                                    <option  name="3" value="50">50</option>
                                                </select></div></div></div>
                                    <?php } ?>
                                    <div class="col-sm-offset-2 col-sm-10">
                    <input  type="submit" value="Save" class="btn btn-primary btn-lg" />
                </div></div></div></div></div></div></form>
                    <?php
                    $count=count(array($_POST["id"]));
                    for($i=0;$i<$count;$i++){
                    $do = isset($_GET['do']) ? $_GET['do'] : 'Manage';
                    if ($do == 'Update'){
            $id         = $_POST['id'];
            $math_activity          = $_POST['math_activity'];
            $math_attendance        = $_POST['math_attendance'];
            $math_evaluation    = $_POST['math_evaluation'];
    $stmt = $con->prepare("UPDATE student SET math_activity[$i] = ?, math_attendance[$i] = ?, math_evaluation[$i] = ?  WHERE id[$i] = ?");
            $stmt->execute(array($math_evaluation, $math_attendance, $math_activity, $id));
    }}?>

活动
25
50
出勤
25
50
评价
25
50

我想，您的表头是固定的，不应该更改吗

表学生：

math_activity  |  math_attendance   |   math_evaluation    <- tableHead
1                   6436                  3445
2                    345                    335            <-inserted rows

    $stmt = $conn->prepare("UPDATE student SET math_activity = ?, math_attendance = ?, math_evaluation = ? WHERE id = ?")
        
        foreach($rows as $row => $value){
        
          $stmt->bind_param("iiii", $math_activity[$row], $math_attendance[$row], $math_evaluation[$row], $id[$row]);    //watch ou Datatypes ("iiii" are correct)
          $stmt->execute();
    }

math_活动| math_出勤| math_评估$value）{
$stmt->bind_param（“iiii”、$math_activity[$row]、$math_attention[$row]、$math_evaluation[$row]、$id[$row]）；//监视ou数据类型（“iiii”正确）
$stmt->execute（）；
}

我想，您的表头是固定的，不应该更改吗

表学生：

math_activity  |  math_attendance   |   math_evaluation    <- tableHead
1                   6436                  3445
2                    345                    335            <-inserted rows

    $stmt = $conn->prepare("UPDATE student SET math_activity = ?, math_attendance = ?, math_evaluation = ? WHERE id = ?")
        
        foreach($rows as $row => $value){
        
          $stmt->bind_param("iiii", $math_activity[$row], $math_attendance[$row], $math_evaluation[$row], $id[$row]);    //watch ou Datatypes ("iiii" are correct)
          $stmt->execute();
    }

math_活动| math_出勤| math_评估$value）{
$stmt->bind_param（“iiii”、$math_activity[$row]、$math_attention[$row]、$math_evaluation[$row]、$id[$row]）；//监视ou数据类型（“iiii”正确）
$stmt->execute（）；
}

名为student的表中名为math_activity的列高度指示模式设计不佳。名为student的表中名为math_activity的列高度指示模式设计不佳