PHP Pagination Function

pagination.php

<?php
function pagination($total, $page, $limit, $query)
{
    $total = !is_numeric($total) ? 0 : (int) $total;
    $page = !is_numeric($page) ? 1 : (int) $page;
    $limit = !is_numeric($limit) ? 25 : (int) $limit;

    $total = (int) $total;

    // query limit start
    $querystart = (($page === 0 ? 2 : $page) - 1) * $limit;
    // last page page number
    $last = ceil($total / $limit) ? ceil($total / $limit) : 1;
    // first page number
    $start = $page != $last && $page > $last ? ($page - 5) : 1;
    // end of page before last page
    $end = $page < $last ? $last - 1 : $last;

    // select all for listing
    $results = is_array($query) ? $query : $this->db->runSelect("{$query} LIMIT {$querystart}, {$limit}"); // example query base

    return [
        'last' => $last,
        'start' => $start,
        'end' => $end,
        'page' => $page,
        'total_results' => $total,
        'results' => $results,
    ];
}