class Pagination {
    public $total = 0;
    public $page = 1;
    public $limit = 20;
    public $num_links = 8;
    public $url = '';
    public $text_first = '|<';
    public $text_last = '>|';
    public $text_next = '>';
    public $text_prev = '<';

    public function prevnext() {
        $total = is_numeric($this->total) ? (int)$this->total : 0;
        $page = is_numeric($this->page) ? (int)$this->page : 1;
        $limit = is_numeric($this->limit) && $this->limit > 0 ? (int)$this->limit : 10;

        $num_pages = ceil($total / $limit);

        $output = array();

        if ($page > 1) {
            $output[] = array("rel" => "prev", "href" => str_replace('{page}', $page - 1, $this->url));
        }

        if ($page < $num_pages) {
            $output[] = array("rel" => "next", "href" => str_replace('{page}', $page + 1, $this->url));
        }

        return $output;
    }

    public function render() {
        $total = is_numeric($this->total) ? (int)$this->total : 0;
        $page = is_numeric($this->page) ? (int)$this->page : 1;
        $limit = is_numeric($this->limit) && $this->limit > 0 ? (int)$this->limit : 10;

        $num_pages = ceil($total / $limit);

        if (empty($this->url)) {
            $this->url = '#'; // Default to prevent errors
        }

        $this->url = str_replace('%7Bpage%7D', '{page}', $this->url);

        $output = '<ul class="pagination">';

        if ($page > 1) {
            $output .= '<li><a href="' . str_replace(array('&amp;page={page}', '?page={page}', '&page={page}', 'page/{page}/'), '', $this->url) . '">' . $this->text_first . '</a></li>';

            if ($page - 1 === 1) {
                $output .= '<li><a href="' . str_replace(array('&amp;page={page}', '?page={page}', '&page={page}', 'page/{page}/'), '', $this->url) . '" class="prev">' . $this->text_prev . '</a></li>';
            } else {
                $output .= '<li><a href="' . str_replace('{page}', $page - 1, $this->url) . '" class="prev">' . $this->text_prev . '</a></li>';
            }
        }

        if ($num_pages > 1) {
            $start = max(1, $page - floor($this->num_links / 2));
            $end = min($num_pages, $page + floor($this->num_links / 2));

            for ($i = $start; $i <= $end; $i++) {
                if ($page == $i) {
                    $output .= '<li class="active"><span>' . $i . '</span></li>';
                } else {
                    $output .= '<li><a href="' . str_replace('{page}', $i, $this->url) . '">' . $i . '</a></li>';
                }
            }
        }

        if ($page < $num_pages) {
            $output .= '<li><a href="' . str_replace('{page}', $page + 1, $this->url) . '" class="next">' . $this->text_next . '</a></li>';
            $output .= '<li><a href="' . str_replace('{page}', $num_pages, $this->url) . '">' . $this->text_last . '</a></li>';
        }

        $output .= '</ul>';

        return $num_pages > 1 ? $output : '';
    }
}
<br />
<b>Fatal error</b>:  Uncaught Error: Class 'Pagination' not found in /var/www/storage/modification/catalog/controller/product/category.php:504
Stack trace:
#0 /var/www/storage/modification/system/engine/action.php(79): ControllerProductCategory-&gt;index()
#1 /var/www/html/catalog/controller/startup/router.php(25): Action-&gt;execute()
#2 /var/www/storage/modification/system/engine/action.php(79): ControllerStartupRouter-&gt;index()
#3 /var/www/storage/modification/system/engine/router.php(134): Action-&gt;execute()
#4 /var/www/storage/modification/system/engine/router.php(123): Router-&gt;execute()
#5 /var/www/html/system/framework.php(169): Router-&gt;dispatch()
#6 /var/www/html/system/startup.php(104): require_once('/var/www/html/s...')
#7 /var/www/html/index.php(34): start()
#8 {main}
  thrown in <b>/var/www/storage/modification/catalog/controller/product/category.php</b> on line <b>504</b><br />