How to create pagination that shows previous and next 3 pages - php

Question

I want to show a pagination which only shows the recent and next 3 pages, but I can't get it working.
Here's my current code:
$stmt = MySQL::connection3()->prepare("SELECT COUNT(ID) AS TOTAL FROM products");
$stmt->execute();
$row = $stmt->fetch();
$total_pages = ceil(intval($row["TOTAL"]) / $results_per_page);
foreach (range(1, $total_pages) as $i) {
if ($i == $page) {
?>
<li class="page-item active">
<?php echo $i ?>
</li>
<?php
} else {
?>
<li class="page-item">
<?php echo $i ?>
</li>
<?php
}
}
Thanks!

Answer 1

I create this example you can run and adapt with your code:
<style>.active{color:green!important}</style>
<?php
echo get_pagination_links('10','100');
function get_pagination_links($current_page, $total_pages)
{
$links = "";
if ($total_pages >= 1 && $current_page <= $total_pages) {
$i = max(2, $current_page - 3);
for (; $i < min($current_page + 4, $total_pages); $i++) {
if($i==$current_page){
$links .= "<li class='page-item active'><a href='?page=$i;' class='page-link'>$i</a></li>";
}else{
$links .= "<li class='page-item'><a href='?page=$i;' class='page-link'>$i</a></li>";
}
}
return $links;
}
}
?>
Output:
7-8-9-10-11-12-13
obviously I didn't connect a database and therefore I used a static result