php pdo เขียน jquery auto fill แล้วติดปัญหาครับ มันไม่ fill ให้ ครับ

 <div class="row"> <!-- อยู่ใน loop while-->
        			<div class="form-group col-md-4">
        				<label for="barcodeMachine">Barcode</label>
    					<input type="text" class="form-control" id="barcodeMachine[]" placeholder="Enter Barcode" name="barcodeMachine[]">
  					</div>
        						
        			<div class="form-group col-md-5 col-md-offset-1">
        				<label for="nameMachine">ชื่อหนัง</label>
    					<input type="text" class="form-control" id="nameMovie[]" name="nameMovie[]">
  					</div>
            </div>

<?php
	include 'connect.php';
try {
		$column = $db->prepare("SELECT * FROM tbl_material WHERE barcode = '".$_POST['barcode']."' ");
		$column->execute();
		$Colcount = $column->columnCount(); 
		//print("result set has $Colcount columns"); //count column 8 column

		$resultArray = array();

		while ($row = $column->fetch(PDO::FETCH_ASSOC)) 
		{
			$arrCol = array();
			for ($i=0; $i<$Colcount; $i++) 
			{
			$arrCol[$column->columnCount($i)] = $row[$i];
			}
			array_push($resultArray, $arrCol);
		}

		$db = null;

		echo json_encode($resultArray);}
	}
	
catch (PDOException $e) {
 echo 'ERROR: ' . $e->getMessage();
}
?>

 <script type="text/javascript">
$(document).ready(function(){

	$('id^="barcodeMachine').keyup(function(){
			$.ajax({ 
				url: "autofill.php" ,
				type: "POST",
				data: 'barcode=' +$('id^="barcodeMachine').val()
			})
			.success(function(result) { 

				var obj = jQuery.parseJSON(result);
				
					if(obj == '')
					{
						$('input[type=text]').val('');
					}
					else
					{
						  $.each(obj, function(key, inval) {
						  	   $('id^="barcodeMachine').val(inval["barcode"]);
							   $('id^="nameMovie').val(inval["title"]);
							   
						  });
					}

			});

		});
	});
</script>