Help with pagination - sql-server

Question

I have created pagination and it is currently working, but the only issue is if I have thousands and thousands of results... the display would be:
[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] and so on.
I just want the display the page to display to look similar to this:
previous [1][2][3][4][5]... next
previous ...[5][6][7][8][9][10]...next
Can anyone give advice or supply some example code that would give me a result like above? If anything is at all unclear please let me know!
Cheers,
Neil
The code that I am currently using is below:
<?php
/*data base connection */
include "datebase connection";
/* SQL query */
$tsql = (" SELECT TOP 100 tie_parent_id, CAST(geo_post AS varchar(6)) + '.' + CAST(geo_sample AS varchar(6)) AS Mile, gps_lat, gps_long, rotten, split, wheel_cut, broken, quality
FROM database
");
$stmt = sqlsrv_query($conn,$tsql, array(), array( "Scrollable" => 'static'));
if( $stmt === false)
{
echo "Error in query preparation/execution.\n";
die( print_r( sqlsrv_errors(), true));
}
/* DETERMINING THE NUMBER OF ROWS (AND PAGES) */
// Set the number of rows to be returned on a page.
$rowsPerPage = 10;
// Get the total number of rows returned by the query.
$rowsReturned = sqlsrv_num_rows($stmt);
if($rowsReturned === false)
die( print_r( sqlsrv_errors(), true));
elseif($rowsReturned == 0)
{
echo "No rows returned.";
exit();
}
else
{
/* Calculate number of pages. */
$numOfPages = ceil($rowsReturned/$rowsPerPage);
}
/* FUNCTION FOR PAGING */
function getPage($stmt, $pageNum, $rowsPerPage )
{
$offset = ($pageNum - 1) * $rowsPerPage;
$rows = array();
$i = 0;
while($row = sqlsrv_fetch_array($stmt,
SQLSRV_FETCH_NUMERIC,
SQLSRV_SCROLL_ABSOLUTE,
$offset + $i)
&& $i < $rowsPerPage)
{
array_push($rows, $row);
$i++;
}
$row = sqlsrv_fetch_array($stmt,SQLSRV_FETCH_NUMERIC,SQLSRV_SCROLL_ABSOLUTE, $offset -1);
return $rows;
}
// Display the selected page of data.
echo "<table width='800' border='0'>";
echo "<tr> <th>Tie ID</th> <th>Mile/Yard</th> <th>GPS Lat</th><th>GPS Long</th><th>Rotten</th><th>Split</th><th>WheelCut</th> <th>Broken</th><th>Quality</th> </tr>";
// keeps getting the next row until there are no more to get
$pageNum = isset($_GET['pageNum']) ? $_GET['pageNum'] : 1;
$page = getPage($stmt, $pageNum, $rowsPerPage);
$color1 = "#ffffff";
$color2 = "#edf5fa";
$row_count = "0";
while($row_count<10 ) {
$row=sqlsrv_fetch_array($stmt);
$tie_parent_id = $row["tie_parent_id"];
$geo_post = $row["Mile"];
$lat =$row["gps_lat"];
$long =$row["gps_long"];
$rotten =$row["rotten"];
$split =$row["split"];
$wheelcut =$row["wheel_cut"];
$broken =$row["broken"];
$quality =$row["quality"];
$row_color = ($row_count % 2) ? $color1 : $color2;
?>
<tr>
<td bgcolor="<?php echo $row_color ?>">
<?php echo $row["tie_parent_id"]; ?></td>
<td bgcolor="<?php echo $row_color ?>">
<?php echo $row["Mile"];?> </td>
<td bgcolor="<?php echo $row_color ?>">
<?php echo $row["gps_lat"];?></td>
<td bgcolor="<?php echo $row_color ?>">
<?php echo $row["gps_long"];?></td>
<td bgcolor="<?php echo $row_color ?>">
<?php echo $row["rotten"];?></td>
<td bgcolor="<?php echo $row_color ?>">
<?php echo $row["split"];?></td>
<td bgcolor="<?php echo $row_color ?>">
<?php echo $row["wheel_cut"];?></td>
<td bgcolor="<?php echo $row_color ?>">
<?php echo $row["broken"];?></td>
<td bgcolor="<?php echo $row_color ?>">
<?php echo $row["quality"];?></td>
</td></tr>
<?php
$row_count++;
}
?>
<?php
/* PREVIOUS PAGE NAVIGATION TOP OF PAGE */
// Display Previous Page link if applicable.
if($pageNum > 1)
{
$prevPageLink = "?pageNum=".($pageNum - 1);
echo "<a href='$prevPageLink'>Previous Page</a>&nbsp";
}
/*DISPLAYING LINKS TO PAGES TOP OF PAGE*/
for($i = 1; $i<=$numOfPages; $i++)
{
$pageLink = "?pageNum=$i";
print("<a href=$pageLink>$i</a> ");
}
/* NEXT PAGE NAVIGATION TOP OF PAGE */
// Display Next Page link if applicable.
if($pageNum < $numOfPages)
{
$nextPageLink = "?pageNum=".($pageNum + 1);
echo " <a href='$nextPageLink'>Next Page</a>";
}
?>
</form>
<?php
/* Close the connection. */
sqlsrv_close( $conn);
?>

Answer 1

The change is actually not too crazy - you have most of it. Your algorithm needs to change just a little bit for the display of the pages - so instead of running your loop like you have:
/*DISPLAYING LINKS TO PAGES TOP OF PAGE*/
for($i = 1; $i<=$numOfPages; $i++)
{
$pageLink = "?pageNum=$i";
print("$i ");
}
You need to start at the current page number that you are on...
/*first check to make sure the number of pages don't exceed maximum*/
$totalPagesToLoop = $pageNum + $numOfPages;
if($totalPagesToLoop > ceiling(total number of pages required to show all the records ([number of total rows]/[number of rows to show per page])
{
$totalPagesToLoop = ceiling(total number of pages required to show all the records ([number of total rows]/[number of rows to show per page]);
}
/*DISPLAYING LINKS TO PAGES TOP OF PAGE*/
for($i = $pageNum; $i<=$totalPagesToLoop; $i++)
{
$pageLink = "?pageNum=$i";
print("$i ");
}
But - thats not all, you will now have to code the special 'previous' and 'next' buttons (you decide how many to increment when you click on that - google increments by 1, until it reaches 20, and then just shows 20 at a time, moving one by one. You'll have to test your variable to decide whether to show the 'previous' or 'next' button at all...

Answer 2

I managed to resolve the issue by using the below code:
for($i = $pageNum; $i<=$numOfPages&&$pagesadded<=9; $i++)
{
$pagesadded+=1;
$pageLink = "?pageNum=$i";
print("<a href=$pageLink>$i</a> ");
}
It displays 10 pages at a time.
Cheers,
Neil