ติดปัญหา serializeArray ส่งค่ามาไม่ครบทุก input ช่วยดูทีครับ

$id = htmlspecialchars($_POST['std_id']);

if(isset($id)) {
			foreach($id as $value) {
				$std = $db->prepare('INSERT INTO tbl_std(id,std_id,logs_id)
							         VALUES (:last_std,:std_id,:logs) ');
				$std->bindParam(':last_std',$last_std,PDO::PARAM_INT);
				$std->bindParam(':logs',$last_id,PDO::PARAM_INT);
				$std->bindParam(':std_id',$value,PDO::PARAM_STR);
				// $std->bindParam(':prefix',$prefix,PDO::PARAM_INT);
				$std->execute();
				$last_std = $db->lastInsertId();
			}
			
		}

<script type="text/javascript">
  $(document).ready(function() {
    $('#submit').click(function() {
      var barcode = $('#barcodeMachine');

      if(barcode.val() == ''){ // Check the password values is empty or not
      	barcode.focus();
      	$('div.barcode').addClass('has-error');
      	$('div.msg-barcode').html('<span class="text-danger">กรุณาใส่บาร์โค้ด !</span>');
        $('div.msg').html('<span class="text-danger">ชื่อเรื่อง !</span>');
      return false;
    }
      else if (barcode.val() != ''){
      	$('div.barcode').removeClass('has-error').addClass('has-success');
      	$('span.text-danger').remove();
    }

    if(barcode.val() != ''){
    	var urlval = $("#borrow").serializeArray();

    	$.ajax({
    		type : 'POST',
    		data : urlval,
    		url : 'save-borrow.php',
    	success:function(data, textStatus, jqXHR){
    		if (textStatus == 'success'){
          alert(data);
    			$('#submit').html('<img src="image/fbloader.gif" />');
    			setTimeout("location.href = 'index.php';",1500);
    		}
    		else {
    			barcode.val('');
    			$('#divResult').html('<span class="text-danger">ผิดพลาด !!</span>');
    		}
 		}
    	});
    }
    	return false;
    }); // click
  }); // document
</script>

function AddRow(){
	var tr_id = 'tr_'+($('#myTable tr').length+1);
	$("#myTable").append(
		'<tr id="'+tr_id+'">'+
		'<td><button type="button" class="btn btn-danger btn-xs"> -- </button></td>'+
		'<td><input type="text" class="form-control input-sm std_id" maxlength="14" name="std_id[]" placeholder="รหัสนักศึกษา" onkeyup="disSubmit($(this).val())"></td>'+
		'<td><select class="form-control input-sm" name="prefix[]">'+
		'<option value="1">นาย</option>'+
	    '<option value="2">น.ส.</option>'+
	    '<option value="3">นาง</option>'+
	    '</select></td>'+
		'<td><input type="text" class="form-control input-sm std_name" name="std_name[]" placeholder="ชื่อ" readonly></td>'+
		'<td><input type="text" class="form-control input-sm std_surname" name="std_surname[]" placeholder="นามสกุล" readonly></td>'+
		'</tr>'
	);