Php 数据表中第0行请求的未知参数“prog_name”错误

在我的一个PHP项目中，我有一个数据表。我需要在数据表的行单击上显示额外/详细信息。为此，我尝试实现在中给出的示例。但是，它不起作用。它向我显示了错误DataTables警告：table id=manage\u elvideos\u table-为第0行请求的未知参数“prog\u name”。有关此错误的详细信息，请参阅http://datatables.net/tn/4

正如错误消息中所建议的，我已尝试通过以下建议点来克服错误，但尚未成功

用于填充数据表的ajax调用工作正常，返回状态200，响应如下：

{"draw":1,"recordsTotal":1,"recordsFiltered":1,"data":[["B.Ed","Year 1","Course 1","Unit 1","Meaning, Nature and principal of Growth and development","Miss Babita","1","\n                            <a href=\"http:\/\/localhost\/jdnbcci\/hoopla\/elearning\/edit_elvideos\/1\" id=\"48_b\" data-value=\"uac_ea\" class=\"trix\" title=\"Edit\"> <span class=\"glyphicon glyphicon-edit\"><\/span><\/a>\n                            <a href=\"http:\/\/localhost\/jdnbcci\/hoopla\/elearning\/view_elvideos\/1\" id=\"48_c\" data-value=\"uac_va\" class=\"trix\" title=\"View\"> <span class=\"glyphicon glyphicon-eye-open\"><\/span><\/a>\n                            <a href=\"http:\/\/localhost\/jdnbcci\/hoopla\/elearning\/delete_elvideos\/1\" id=\"48_d\" data-value=\"uac_da\" class=\"trix\" title=\"Delete\"> <span class=\"glyphicon glyphicon-trash\"><\/span><\/a>\n                            "]]}


            var dataTable = $('#manage_elvideos_table').DataTable({
            //"processing":true,
            "serverSide":true,
            //"order":[],
            "ajax":{
                url:"<?=site_url();?>hoopla/elearning/fetch_elvideos",
                dataType: 'json',
                type:"POST"
            },
            "columns": [
                {
                    "className":      'details-control',
                    "orderable":      false,
                    "data":           null,
                    "defaultContent": ''
                },
                { "data": "prog_name" },
                { "data": "prog_year" },
                { "data": "course_name" },
                { "data": "unit_name" },
                { "data": "ut_unit_sub_topic" },
                { "data": "as_apts_name" },
                {
                    "data": "video_id",
                    "render":function(data, type, row, meta){
                        data = '<a href="<?=site_url();?>nautics/bankagent/view/' + data + '" class="btn btn-warning btn-xs" title="View"><i class="far fa-eye"></i></a>&nbsp;<a href="<?=site_url();?>nautics/bankagent/edit/' + data + '" class="btn btn-info btn-xs" title="Edit"><i class="far fa-edit"></i></a>&nbsp;<a href="javascript:feature_in_next_version();" class="btn btn-danger btn-xs" title="Delete"><i class="far fa-trash-alt"></i></a>';
                        return data;

                    }
                }                    
            ],
            "order": [[1, 'asc']],
            select: true,
            colReorder: true
            
        });
    
        // Add event listener for opening and closing details
        $('#manage_elvideos_table tbody').on('click', 'td.details-control', function () {
            var tr = $(this).closest('tr');
            var row = table.row( tr );

            if ( row.child.isShown() ) {
                // This row is already open - close it
                row.child.hide();
                tr.removeClass('shown');
            }
            else {
                // Open this row
                row.child( format(row.data()) ).show();
                tr.addClass('shown');
            }
        } );


                                <table class="table table-striped table-bordered table-hover" id="manage_elvideos_table">
                                <thead>
                                <tr>
                                    <th></th>
                                    <th>Prog</th>
                                    <th>Year</th>
                                    <th>Course</th>
                                    <th>Unit</th>
                                    <th>Video On</th>
                                    <th>Video By</th>
                                    <th>Options</th>
                                </tr>
                                </thead>
                                <tfoot>
                                    <tr>
                                        <th></th>
                                        <th>Prog</th>
                                        <th>Year</th>
                                        <th>Course</th>
                                        <th>Unit</th>
                                        <th>Video On</th>
                                        <th>Video By</th>
                                        <th>Options</th>
                                    </tr>
                                </tfoot>                                    
                            </table>

---

请告知我的代码有什么问题。

我将把它转换成代码片段。我们只需要做一个例子，就是site_url的值。然后我们可以从那里开始，看看我们到了哪里。感谢@Ivan86的评论，但不幸的是，这个项目不能在互联网上获得，只能在本地计算机上进行直播。