What are common challenges faced when implementing a pagination system in PHP forums?

One common challenge faced when implementing a pagination system in PHP forums is handling the calculation of the total number of pages based on the total number of items and items per page. This can be solved by dividing the total number of items by the items per page and rounding up to the nearest whole number.

// Calculate total number of pages
$totalItems = 1000;
$itemsPerPage = 10;
$totalPages = ceil($totalItems / $itemsPerPage);