- floor: documentation ( source)
<?php
$perPage = 24;
echo 'Item 36 is on page ' . floor($perPage / 36) . "\n";
echo 'Item 55 is on page ' . floor(55 / $perPage) . "\n";
echo 'Item 96 is on page ' . floor(96 / $perPage) . "\n";
echo 'Item 700 is on page ' . floor(700 / $perPage) . "\n";