How can the use of variables like $start and $ende in PHP scripts affect the pagination functionality?

Using variables like $start and $end in PHP scripts can affect pagination functionality if they are not properly calculated or used. These variables are often used to determine the range of results to display on each page. If they are not correctly set based on the current page number and the number of items per page, the pagination may not work as expected. To solve this issue, ensure that $start and $end are calculated accurately to display the correct range of results for each page.

// Example of calculating $start and $end for pagination functionality
$page = isset($_GET['page']) ? $_GET['page'] : 1;
$items_per_page = 10;
$start = ($page - 1) * $items_per_page;
$end = $start + $items_per_page;

// Use $start and $end to fetch results from database
$query = "SELECT * FROM products LIMIT $start, $items_per_page";
// Execute query and display results