Paging and query string for individual post MsSQL & PHP - php

Question

I have written a paging script to page all the posts in my blog. Now I would like to create and endpoint such that I can go to mydomain/index.php?blogID1, mydomain/index.php?blogID2, mydomain/index.php?blogID3, mydomain/index.php?blogID4, etc.
Where can I read about doing this, and how do I implement it the easiest way possible, given my current script:
<?php
$rowsPerPage = 2;
try
{
$conn = new PDO( "sqlsrv:server=localhost ; Database=blog", "******", "*******");
$conn->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
}
catch(Exception $e)
{
die( print_r( $e->getMessage() ) );
}
try
{
$tsql = "SELECT COUNT(blogID) FROM blog_posts";
$stmt = $conn->query($tsql);
$rowsReturned = $stmt->fetch(PDO::FETCH_NUM);
if($rowsReturned[0] == 0)
{
echo "No rows returned.";
}
else
{
$numOfPages = ceil($rowsReturned[0]/$rowsPerPage);
for($i = 1; $i<=$numOfPages; $i++)
{
$pageNum = "index.php?pageNum=$i";
print("<a href='$pageNum' class='btn btn-primary active btn-sm'>$i</a> ");
}
}
$tsql = "SELECT * FROM
(SELECT ROW_NUMBER() OVER(ORDER BY blogID DESC)
AS RowNumber,
blog_title,
blog_post,
blog_author,
blog_category,
blog_date,
blogID
FROM blog_posts)
AS Temp
WHERE RowNumber BETWEEN ? AND ?";
$stmt2 = $conn->prepare($tsql);
if(isset($_GET['pageNum']))
{
$highRowNum = $_GET['pageNum'] * $rowsPerPage;
$lowRowNum = $highRowNum - $rowsPerPage + 1;
}
else
{
$lowRowNum = 1;
$highRowNum = $rowsPerPage;
}
$params = array(&$lowRowNum, &$highRowNum);
$stmt2->execute(array($lowRowNum, $highRowNum));
while($row = $stmt2->fetch(PDO::FETCH_NUM) )
{
echo "$row[1]";
echo "$row[2]";
echo "$row[3]";
echo date_format( new DateTime($row['5']), 'd M Y, H:i' );
echo "$row[4]";
echo "$row[6]";
}
}
catch(Exception $e)
{
die( print_r( $e->getMessage() ) );
}
?>

Answer 1

Is row a post?
You can order your rows by any column, then limit the number of results and set an offset depending which page was requested.
Here's about mysql that endpoint: MySQL Data - Best way to implement paging?
For example if page is requested like this: index.php?pageNum=15 and you are showing 5 posts per page,
Grab that value with $page = $_GET['pageNum'] and set your PDO prepared statements for result number and offset (LIMIT).
Declare $resultsPerPage = 5
SELECT *
FROM Posts
LIMIT :offset, :maxResults
And push in those prepared statements:
offset --> ($page - 1) * $resultsPerPage
maxResults --> $resultsPerPage