数据表插件php和json错误

时间：2018-10-20 05:46:59

标签： php jquery json ajax html5

我是编程的新手。我尝试设计一个管理面板，该面板可以借助datatable插件直接编辑用户数据。JSON格式存在一些错误

这是我的索引页

 <html>
 <head>
  <title>Live Add Edit Delete Datatables Records using PHP Ajax</title>
  <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
  <script src="https://cdn.datatables.net/1.10.15/js/jquery.dataTables.min.js"></script>
  <script src="https://cdn.datatables.net/1.10.15/js/dataTables.bootstrap.min.js"></script>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.6.4/css/bootstrap-datepicker.css" />
  <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.6.4/js/bootstrap-datepicker.js"></script>
  <style>
  body
  {
   margin:0;
   padding:0;
   background-color:#f1f1f1;
  }
  .box
  {
   width:1270px;
   padding:20px;
   background-color:#fff;
   border:1px solid #ccc;
   border-radius:5px;
   margin-top:25px;
   box-sizing:border-box;
  }
  </style>
 </head>
 <body>
  <div class="container box">
   <h1 align="center">Live Add Edit Delete Datatables Records using PHP Ajax</h1>
   <br />
   <div class="table-responsive">
   <br />
    <div align="right">
     <button type="button" name="add" id="add" class="btn btn-info">Add</button>
    </div>
    <br />
    <div id="alert_message"></div>
    <table id="user_data" class="table table-bordered table-striped">
     <thead>
      <tr>
       <th>Staff id</th>
       <th>Password</th>
       <th>Email_id</th>
       <th>gender</th>
       <th>qualification</th>
       <th>course1</th>
       <th>course2</th>
       <th>course3</th>
       <th></th>
      </tr>
     </thead>
    </table>
   </div>
  </div>
 </body>
</html>

<script type="text/javascript" language="javascript" >
 $(document).ready(function(){

  fetch_data();

  function fetch_data()
  {
   var dataTable = $('#user_data').DataTable({
    "processing" : true,
    "serverSide" : true,
    "order" : [],
    "ajax" : {
     url:"fetch.php",
     type:"POST"
    }
   });
  }

  function update_data(id, column_name, value)
  {
   $.ajax({
    url:"update.php",
    method:"POST",
    data:{id:id, column_name:column_name, value:value},
    success:function(data)
    {
     $('#alert_message').html('<div class="alert alert-success">'+data+'</div>');
     $('#user_data').DataTable().destroy();
     fetch_data();
    }
   });
   setInterval(function(){
    $('#alert_message').html('');
   }, 5000);
  }

  $(document).on('blur', '.update', function(){
   var id = $(this).data("id");
   var column_name = $(this).data("column");
   var value = $(this).text();
   update_data(id, column_name, value);
  });

  $('#add').click(function(){
   var html = '<tr>';
   html += '<td contenteditable id="data1"></td>';
   html += '<td contenteditable id="data2"></td>';
   html += '<td contenteditable id="data3"></td>';
   html += '<td><button type="button" name="insert" id="insert" class="btn btn-success btn-xs">Insert</button></td>';
   html += '</tr>';
   $('#user_data tbody').prepend(html);
  });

  $(document).on('click', '#insert', function(){
   var first_name = $('#data1').text();
   var last_name = $('#data2').text();
   var password = $('#data3').text();
   if(first_name != '' && last_name != '' && password != '')
   {
    $.ajax({
     url:"insert.php",
     method:"POST",
     data:{first_name:first_name, last_name:last_name, password:password},
     success:function(data)
     {
      $('#alert_message').html('<div class="alert alert-success">'+data+'</div>');
      $('#user_data').DataTable().destroy();
      fetch_data();
     }
    });
    setInterval(function(){
     $('#alert_message').html('');
    }, 5000);
   }
   else
   {
    alert("Both Fields is required");
   }
  });

  $(document).on('click', '.delete', function(){
   var id = $(this).attr("id");
   if(confirm("Are you sure you want to remove this?"))
   {
    $.ajax({
     url:"delete.php",
     method:"POST",
     data:{id:id},
     success:function(data){
      $('#alert_message').html('<div class="alert alert-success">'+data+'</div>');
      $('#user_data').DataTable().destroy();
      fetch_data();
     }
    });
    setInterval(function(){
     $('#alert_message').html('');
    }, 5000);
   }
  });
 });
</script>

这是我的fetch.php文件

<?php
//fetch.php
$connect = mysqli_connect("localhost", "root", "", "flash");
$columns = array('staff_id', 'password','email_id','gender','qualification','course1','course2','course3');

$query = "SELECT * FROM staff ";

if(isset($_POST["search"]["value"]))
{
 $query .= '
 WHERE staff_id LIKE "%'.$_POST["search"]["value"].'%" 
 OR email_id LIKE "%'.$_POST["search"]["value"].'%" 
 ';
}

if(isset($_POST["order"]))
{
 $query .= 'ORDER BY '.$columns[$_POST['order']['0']['column']].' '.$_POST['order']['0']['dir'].' 
 ';
}
else
{
 $query .= 'ORDER BY id DESC ';
} 

$query1 = '';

if($_POST["length"] != -1)
{
 $query1 = 'LIMIT ' . $_POST['start'] . ', ' . $_POST['length'];
}

$number_filter_row = mysqli_num_rows(mysqli_query($connect, $query));

$result = mysqli_query($connect, $query . $query1);

$data = array();

while($row = mysqli_fetch_array($result))
{
 $sub_array = array();
 $sub_array[] = '<div contenteditable class="update" data-id="'.$row["SINO"].'" data-column="staff_id">' . $row["staff_id"] . '</div>';
 $sub_array[] = '<div contenteditable class="update" data-id="'.$row["SINO"].'" data-column="password">' . $row["password"] . '</div>';
 $sub_array[] = '<div contenteditable class="update" data-id="'.$row["SINO"].'" data-column="email_id">' . $row["email_id"] . '</div>';
 $sub_array[] = '<div contenteditable class="update" data-id="'.$row["SINO"].'" data-column="gender">' . $row["gender"] . '</div>';
 $sub_array[] = '<div contenteditable class="update" data-id="'.$row["SINO"].'" data-column="qualification">' . $row["qualification"] . '</div>';
 $sub_array[] = '<div contenteditable class="update" data-id="'.$row["SINO"].'" data-column="course1">' . $row["course1"] . '</div>';
 $sub_array[] = '<div contenteditable class="update" data-id="'.$row["SINO"].'" data-column="course2">' . $row["course2"] . '</div>';
 $sub_array[] = '<div contenteditable class="update" data-id="'.$row["SINO"].'" data-column="course3">' . $row["course3"] . '</div>';
 $sub_array[] = '<button type="button" name="delete" class="btn btn-danger btn-xs delete" id="'.$row["SINO"].'">Delete</button>';
 $data[] = $sub_array;
}

function get_all_data($connect)
{
 $query = "SELECT * FROM staff";
 $result = mysqli_query($connect, $query);
 return mysqli_num_rows($result);
}

$output = array(
 "draw"    => intval($_POST["draw"]),
 "recordsTotal"  =>  get_all_data($connect),
 "recordsFiltered" => $number_filter_row,
 "data"    => $data
);

echo json_encode($output);

?>

这将显示一条警告消息，例如

  

DataTables警告：表id = user_data-无效的JSON响应。对于   有关此错误的更多信息，请参见   http://datatables.net/tn/1

fetch.php文件显示如下错误声明

  

注意：未定义索引：C：\ xampp \ htdocs \ FLASH \ admin中的长度   第28行的Modify \ fetch.php

     

注意：未定义的索引：从C：\ xampp \ htdocs \ FLASH \ admin开始   第30行的Modify \ fetch.php

     

注意：未定义索引：C：\ xampp \ htdocs \ FLASH \ admin中的长度   第30行的Modify \ fetch.php

     

警告：mysqli_num_rows（）期望参数1为mysqli_result，   在C：\ xampp \ htdocs \ FLASH \ admin Modify \ fetch.php中给出的布尔值   33

     

警告：mysqli_fetch_array（）期望参数1为mysqli_result，   在C：\ xampp \ htdocs \ FLASH \ admin Modify \ fetch.php中给出的布尔值   39

     

注意：未定义索引：绘制在C：\ xampp \ htdocs \ FLASH \ admin   第62行的Modify \ fetch.php   {“ draw”：0，“ recordsTotal”：4，“ recordsFiltered”：null，“ data”：[]}

老兄，请帮我解决这个问题。

0 个答案:

没有答案
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