Question

当数据来自表单上的多选（复选框）字段时，我想为每门学生课程组合分配多门单独的课程给学生。也就是说，将数据作为包含多个课程的单个结果返回，我想将其拆分。

简短版本：老师从一个下拉菜单中选择了多个课程，但我想将数据保存为多行。

这是我的代码。

<?php

$con = mysqli_connect('localhost','root');

mysqli_select_db($con,'sss_qr');


    $q="select * from  course_tb ";
$result=mysqli_query($con,$q);

?>

<!DOCTYPE html>
<html>
 <head>
  <title>Webslesson Tutorial | Bootstrap Multi Select Dropdown with Checkboxes using Jquery in PHP</title>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-3-typeahead/4.0.2/bootstrap3-typeahead.min.js"></script>  
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" />
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-multiselect/0.9.13/js/bootstrap-multiselect.js"></script>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-multiselect/0.9.13/css/bootstrap-multiselect.css" />
 </head>
 <body>
  <br /><br />
  <div class="container" style="width:600px;">
   <h2 align="center">Bootstrap Multi Select Dropdown with Checkboxes using Jquery in PHP</h2>
   <br /><br />
   <form method="post" id="framework_form">
    <div class="form-group">
     <label>Select which Framework you have knowledge</label>
     <select id="framework" name="framework[]" multiple class="form-control" >
      <?php
        if($result)
        {
            while($row=mysqli_fetch_array($result))
            {
                $course=$row["course_name"];
                $code=$row["course_code"];
                echo "<option value='$code'>$course</option>";          
            }
        }
        ?>
     </select>
    </div>
    <div class="form-group">
     <input type="submit" class="btn btn-info" name="submit" value="Submit" />
    </div>
   </form>
   <br />
  </div>
 </body>
</html>
<script>
$(document).ready(function(){
 $('#framework').multiselect({
  nonSelectedText: 'Select Framework',
  enableFiltering: true,
  enableCaseInsensitiveFiltering: true,
  buttonWidth:'400px'
 });

 $('#framework_form').on('submit', function(event){
  event.preventDefault();
  var form_data = $(this).serialize();
  $.ajax({
   url:"insert.php",
   method:"POST",
   data:form_data,
   success:function(data)
   {
    $('#framework option:selected').each(function(){
     $(this).prop('selected', false);
    });
    $('#framework').multiselect('refresh');
    alert(data);
   }
  });
 });


});
</script>

和insert.php文件

<?php 
$connect = mysqli_connect("localhost", "root", "", "sss_qr");
if(isset($_POST["framework"]))
{   
    $framework = '';
 foreach($_POST["framework"] as $row)
 {
  $framework .= $row . ', ';
 }
 $framework = substr($framework, 0, -2);
 $query = "INSERT INTO allocoursestudent(course_code) VALUES('".$framework."')";
 if(mysqli_query($connect, $query))
 {
  echo 'Data Inserted';
 }
}
?>

Answer 1

首先，您需要创建一个将学生和课程配对的新表。其次，您需要在表单（下拉菜单）中显示学生。

之后，您可以执行以下操作：


<?php 
$connect     = mysqli_connect("localhost", "root", "", "sss_qr");

if(isset($_POST["course_code"])){


    $course_code = mysqli_real_escape_string($con, $_POST["course_code"]);
    $student_id  = mysqli_real_escape_string($con, $_POST["student_id"]);

    $query = "INSERT INTO new_table_name(course_code, student_id) VALUES";

    for($i=0; $i<count($course_code); $i++){
        $query .= " ('".$course_code[$i] ."', '".$student_id[$i]."'),";
    }

    $query  = substr($query, 0, -1);

    if(mysqli_query($connect, $query)){
        echo 'Data Inserted #'.$i;
    }

}
?>

Answer 2

所以我通过使用此代码解决了这个问题。

<?php 
$con = mysqli_connect("localhost", "root", "", "sss_qr");
$course=$_POST['course'];
if($course)
{
    foreach($course as $c)
    {
        $q="INSERT INTO allocoursestudent(course_code) VALUES('".$c."')";
        mysqli_query($con,$q);
    }
}
?>

从一个下拉列表中选择多个项目，然后插入数据库的多行中

2 个答案: