[HELP] Datatables Selecting array data problem

<?php
require_once("../own/connect/mysqli.php");

$params = $columns = $totalRecords = $data = array();

$params = $_REQUEST;

$columns = array(
0 => 'backlink_title',
1 => 'backlink_dapa',
2 => 'backlink_spamscore',
3 => 'backlink_age',
4 => 'backlink_type',
5 => 'backlink_offpagescore',
6 => 'backlink_link',
7 => 'backlink_steps',
8 => 'backlink_premium'
);

$where_condition = $sqlTot = $sqlRec = "";

if( !empty($params['search']['value']) ) {
$where_condition .= " WHERE ";
$where_condition .= " ( backlink_id LIKE '%".$params['search']['value']."%' ";  
$where_condition .= " OR backlink_dapa LIKE '%".$params['search']['value']."%' )";
}

$sql_query = " SELECT * FROM backlink ";
$sqlTot .= $sql_query;
$sqlRec .= $sql_query;

if(isset($where_condition) && $where_condition != '') {

$sqlTot .= $where_condition;
$sqlRec .= $where_condition;
}

$sqlRec .=  " ORDER BY ". $columns[$params['order'][0]['column']]."   ".$params['order'][0]['dir']."  LIMIT ".$params['start']." ,".$params['length']." ";

$queryTot = mysqli_query($con, $sqlTot) or die("Database Error:". mysqli_error($con));

$totalRecords = mysqli_num_rows($queryTot);

$queryRecords = mysqli_query($con, $sqlRec) or die("Error to Get the Post details.");

while( $row = mysqli_fetch_row($queryRecords) ) {
$data[] = $row;
}

$json_data = array(
"draw"            => intval( $params['draw'] ),  
"recordsTotal"    => intval( $totalRecords ),
"recordsFiltered" => intval($totalRecords),
"data"            => $data
);

echo json_encode($json_data);
?>

    <table id="post_list" class="display" width="100%" cellspacing="0">
            <thead>
                <tr>
                <th>Title</th>
                <th>Da/Pa</th>
               
                </tr>
            </thead>
            <tbody>
            <tr>
           
            </tr>
            </tbody>
           
        </table>

<table id="post_list" class="display" width="100%" cellspacing="0">
            <thead>
                <tr>
                <th>Title</th>
                <th>Da/Pa</th>
             
                </tr>
            </thead>
            <tbody>
<?php
foreach ($data as $row) {
echo '<tr><td>' . $row[0] . '</td><td>' . $row[1] . '</td></tr>';
}
?>
           
         
            </tr>
            </tbody>
         
        </table>