PHP : หน้าไม่แบ่งตามที่ตั้งตาม page ไว้ครับ

   <?php
	$conn = mysqli_connect($serverName,$userName,$userPassword,$dbName);

	$sql = "SELECT * FROM product ORDER BY product.Dateprd DESC";

	$query = mysqli_query($conn,$sql);
$query = mysqli_query($conn,$sql);

   $conn = mysqli_connect($serverName,$userName,$userPassword,$dbName);

	$sql = "SELECT * FROM product";
	$query = mysqli_query($conn,$sql);

	$num_rows = mysqli_num_rows($query);

	$per_page = 5;   // Per Page
	$page  = 1;
	
	if(isset($_GET["Page"]))
	{
		$page = $_GET["Page"];
	}

	$prev_page = $page-1;
	$next_page = $page+1;

	$row_start = (($per_page*$page)-$per_page);
	if($num_rows<=$per_page)
	{
		$num_pages =1;
	}
	else if(($num_rows % $per_page)==0)
	{
		$num_pages =($num_rows/$per_page) ;
	}
	else
	{
		$num_pages =($num_rows/$per_page)+1;
		$num_pages = (int)$num_pages;
	}
	$row_end = $per_page * $page;
	if($row_end > $num_rows)
	{
		$row_end = $num_rows;
	}


	$sql .= " ORDER BY ProductID ASC LIMIT $row_start ,$row_end ";
	$query = mysqli_query($conn,$sql);

?>