ช่วยดูโค้ดหน่อยค่ะรูปมันไม่แสดง select*from tb_photo order by id_photo desc limit $start,1

<?
$order=$_GET['order'];
if ($order== "" ){$order=1;}
$start=$order-1;

include "connect.php";
$sql="select*from tb_photo order by id_photo desc limit
$start,1";
$result=mysql_db_query($dbname,$sql);
$r=mysql_fetch_array($result);
$id_photo=$r[id_photo];
$name_photo=$r[name_photo];
$detail_photo=$r[detail_photo];
$sql="select*from tb_photo";
$result=mysql_db_query($dbname,$sql);
$total=mysql_num_rows($result);

echo "<h2>DISPLAY PHOTO </h2>";
echo "<img src='images/$name_photo' border=1><p>";
echo "<b>รายละเอียด :</b><br>";
echo "$detail_photo<p>";

if ($order>1){
	$prev=$order-1;
	echo "<a href='view.php?order=$prev'>
	<img src= 'back.gif' border=0></a>&nbsp;";
	}
	echo "($order of $total)";
	if ($order<>$total){
	$next=$order+1;
	echo "&nbsp;<a href='view.php?order=$next'>
	<img src='next.gif' border=0></a>";
	}
	mysql_close();
	?>