无法请求数据

Question

嗨，我尝试使用代码对请求数据列进行编码：

$serverName = "1.1.1.1"; 
$connectionInfo = array( "Database"=>"a", "UID"=>"a", "PWD"=>"a", 'CharacterSet' => 'a');
$conn = sqlsrv_connect( $serverName, $connectionInfo);
$requestData= $_REQUEST;    
$columns = array( 
0 => 'REGISTRATION_NUMBER',
1 => 'SEAFARER_CODE' ,
2 => 'LAST_NAME',
3 => 'FIRST_NAME',
4 => 'GENDER_ID',
5 => 'DOB',
6 => 'ENROLLMENT_LOCATION',
7 => 'ENROLLMENT_SCHEDULE',
8 => 'STATUS_ID',
9 => 'REASON_FOR_ISSUANCE'     
);


$sql = "SELECT REGISTRATION_NUMBER, SEAFARER_CODE, LAST_NAME, FIRST_NAME,       GENDER_ID, DOB, ENROLLMENT_LOCATION, ENROLLMENT_SCHEDULE , STATUS_ID,  REASON_FOR_ISSUANCE from dbo.DEMOGRAPHICS";
$query=sqlsrv_query($conn, $sql, array(), array( "Scrollable" => 'static'  )) or die("admin.php: get InventoryItems");
$totalData = sqlsrv_num_rows($query);
$totalFiltered = $totalData;   


$sql = "SELECT REGISTRATION_NUMBER, SEAFARER_CODE, LAST_NAME, FIRST_NAME, GENDER_ID, DOB, ENROLLMENT_LOCATION, ENROLLMENT_SCHEDULE , STATUS_ID, REASON_FOR_ISSUANCE  ";
$sql.=" from dbo.DEMOGRAPHICS WHERE 1 = 1";

if( !empty($requestData['columns'][8]['search']['value']) ){   
$sql.=" AND STATUS_ID LIKE '".$requestData['columns'][8]['search'] ['value']."%' ";
}

$query=sqlsrv_query($conn, $sql, array(), array( "Scrollable" => 'static' )) or die("admin.php: get InventoryItems");
$totalFiltered = sqlsrv_num_rows($query); 
$sql.=" ORDER BY ". $columns[$requestData['order'][0]['column']]."   ".$requestData['order'][0]['dir']."   LIMIT ".$requestData['start']."  ,".$requestData['length']."   ";  
$query=sqlsrv_query($conn, $sql, array(), array( "Scrollable" => 'static' )) or die("admin.php: get InventoryItems"); 

$data = array();
while( $row=sqlsrv_fetch_array($query) ) {  
$nestedData=array(); 

$nestedData[]   = $row["REGISTRATION_NUMBER"];  
$nestedData[]   = $row["SEAFARER_CODE"];    
$nestedData[]   = 'a';
$nestedData[]   = 'a';
$nestedData[]   = 'a';
$nestedData[]   = 'a';
$nestedData[]   = 'a';
$nestedData[]   = 'a';
$nestedData[]   = 'a';
$nestedData[]   = 'a';
$nestedData[]   = 'a';

$data[] = $nestedData;    
}

$json_data = array(
"draw"            => intval( $requestData['draw'] ),   
"recordsTotal"    => intval( $totalData ),  
"recordsFiltered" => intval( $totalFiltered ), 
"data"            => $data   
);

echo json_encode($json_data);  
?>

并显示错误：

  

注意：未定义索引：订购顺序   第39行的C：\ xampp \ htdocs \ sid \ services \ tabel \ admin.php

     

注意：未定义索引：在   第39行的C：\ xampp \ htdocs \ sid \ services \ tabel \ admin.php

     

注意：未定义索引：订购顺序   第39行的C：\ xampp \ htdocs \ sid \ services \ tabel \ admin.php

     

注意：未定义的索引：开始于   第39行的C：\ xampp \ htdocs \ sid \ services \ tabel \ admin.php

     

注意：未定义索引：长度为   第39行上的C：\ xampp \ htdocs \ sid \ services \ tabel \ admin.php admin.php：获取   库存物品