upload file มันไม่เก็บชื่อ พอตอนเก็บจะเก็บ $name ลงฐานข้อมูล แต่ไม่ลง

<?
/******* config *********/
$folder = "c:/AppServ/www/aon/Ex_book/"; 
/********* param ********/
$bigchernFile = $_FILES['bigchernFile'];
$event = $_REQUEST['event'];
/********* event  *******/
if($event=="upload"){
 for($i=0;$i<count($bigchernFile['name']);$i++){
   if(is_file($bigchernFile['tmp_name'][$i])){
   echo $bigchernFile['name'][$i]." ชื่อไฟล์หนังสือ<br>";
         copy($bigchernFile['tmp_name'][$i],$folder.$bigchernFile['name'][$i]);
       }
 } 

echo "<script> alert('รับหนังสือเรียบร้อยแล้วค่ะ');</script>";
echo "<script> document.location='?';</script>"; 

$name=$bigchernFile['name'][$i];//กำหนดให้ $name รับชื่อไฟล์ที่อัพโหลด

include("../include/connect.php");
$Id_receiver=($_POST['Id_receiver']);
$Id_book=($_POST['Id_book']);
$Date_book=($_POST['Date_book']);
$Date_receiver=($_POST['Date_receiver']);
$From=($_POST['From']);
$To=($_POST['To']);
$Subject=($_POST['Subject']);
$Speed_id=($_POST['Speed_id']);
$Secret_id=($_POST['Secret_id']);
$Document_type_id=($_POST['Document_type_id']);

$Date_book=$yy."-".$mm."-".$dd;

$sql="insert into tb_receiver values('$Id_receiver','$Id_book','$Date_book','$Date_receiver','$From','$To','$Subject','$Speed_id','$Secret_id','$Document_type_id','$name')";
$res=mysql_db_query($dbname,$sql);

exit();
}

?>