How can the total number of pages be calculated in a PHP gallery with pagination functionality?

To calculate the total number of pages in a PHP gallery with pagination functionality, you need to determine the total number of items or images in the gallery and divide it by the number of items per page. This will give you the total number of pages needed to display all items in the gallery with pagination.

// Total number of items in the gallery
$totalItems = 100;

// Number of items per page
$itemsPerPage = 10;

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

echo "Total number of pages: " . $totalPages;