php วนลูปแล้ว มันย้อนกลับมาไอดี ก่อน หน้าที่เคยแสดงต่อเพจ หน้าถัดไปไม่เรียงต่อไอดีก่อนหน้านี้

<?php 		
		include("conectdatabas.php");
		
		
		
         $strSQL ="SELECT * FROM  data  ";
		 $query = mysqli_query($conn,$strSQL);
		 $num_rows = mysqli_num_rows($query);
         $per_page = 100;   // 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;
	}


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

?>
<?php
	while($objResult=mysqli_fetch_array($query,MYSQLI_ASSOC))
		{

			 echo $objResult["name"]; 
?>
<br>
<?php
 
   }
   

?>



<?php
if($prev_page)
{
?>
	<div class="foot">
<?php
	echo " <a href='$_SERVER[SCRIPT_NAME]?Page=$prev_page'>Back<< </a> ";
?>
    </div>
<?php
}
?>


<?php
for($i=1; $i<=$num_pages; $i++){
	if($i != $page)
	{
		echo "[ <a href='$_SERVER[SCRIPT_NAME]?Page=$i'>$i</a> ]";
	}
	else
	{
		echo "<b> $i </b>";
	}
}
if($page!=$num_pages)
{
?>
	<div class="foot_next">
	<?php
	echo " <a href ='$_SERVER[SCRIPT_NAME]?Page=$next_page'>Next>></a> ";
	?>
	</div>
<?php
}
$conn = null;
?>