Opencart custom pagination class

<?php
/*
tested with opencart 1.5.4
*/

class Pagination {
    public $total = 0;
    public $page = 1;
    public $limit = 20;
    public $num_links = 10;
    public $url = '';
    public $text = 'Showing {start} to {end} of {total} ({pages} Pages)';
    public $text_first = '|&lt;';
    public $text_last = '&gt;|';
    public $text_next = '&gt;';
    public $text_prev = '&lt;';
    public $style_links = 'links';
    public $style_results = 'results';

    public $show_next_last = false;
    public $dots_before = '';
    public $dots_after = '';
    public $current_before = '';
    public $current_after = '';
    public $prev_before = '';
    public $prev_after = '';
    public $next_before = '';
    public $next_after = '';
    public $link_before = '';
    public $link_after = '';
    public $output_before = '';
    public $output_after = '';

    public function render() {
        $total = $this->total;

        if ($this->page < 1) {
            $page = 1;
        } else {
            $page = $this->page;
        }

        if (!(int)$this->limit) {
            $limit = 10;
        } else {
            $limit = $this->limit;
        }

        $num_links = $this->num_links;
        $num_pages = ceil($total / $limit);

        $output = '';

        if ($page > 1) {
            if ($this->show_next_last) {
                $output .= ' <a href="' . str_replace('{page}', 1, $this->url) . '">' . $this->text_first . '</a> ';
            }
            if ($this->prev_before && $this->prev_after) {
                $output .= ' ' . str_replace('{url}', str_replace('{page}', $page - 1, $this->url), $this->prev_before);
                $output .= $this->text_prev;
                $output .= $this->prev_after . ' ';
            } else {
                $output .= ' <a href="' . str_replace('{page}', $page - 1, $this->url) . '">' . $this->text_prev . '</a> ';
            }
        }

        if ($num_pages > 1) {
            if ($num_pages <= $num_links) {
                $start = 1;
                $end = $num_pages;
            } else {
                $start = $page - floor($num_links / 2);
                $end = $page + floor($num_links / 2);

                if ($start < 1) {
                    $end += abs($start) + 1;
                    $start = 1;
                }

                if ($end > $num_pages) {
                    $start -= ($end - $num_pages);
                    $end = $num_pages;
                }
            }

            if ($start > 1) {
                $output .= $this->dots_before . ' ... ' . $this->dots_after;
            }

            for ($i = $start; $i <= $end; $i++) {
                if ($page == $i) {
                    $output .= $this->current_before;
                    $output .= !$this->current_before ? ' <b>' : '';
                    $output .= $i;
                    $output .= !$this->current_after ? '</b> ' : '';
                    $output .= $this->current_after;
                } else {
                    if ($this->link_before && $this->link_after) {
                        $output .= ' ' . str_replace('{url}', str_replace('{page}', $i, $this->url), $this->link_before);
                        $output .= $i;
                        $output .= $this->link_after . ' ';
                    } else {
                        $output .= ' <a href="' . str_replace('{page}', $i, $this->url) . '">' . $i . '</a> ';
                    }
                }
            }

            if ($end < $num_pages) {
                $output .= $this->dots_before . ' ... ' . $this->dots_after;
            }
        }

        if ($page < $num_pages) {
            if ($this->next_before && $this->next_after) {
                $output .= ' ' . str_replace('{url}', str_replace('{page}', $page + 1, $this->url), $this->next_before);
                $output .= $this->text_next;
                $output .= $this->next_after . ' ';
            } else {
                $output .= ' <a href="' . str_replace('{page}', $page + 1, $this->url) . '">' . $this->text_next . '</a> ';
            }
            if ($this->show_next_last) {
                $output .= ' <a href="' . str_replace('{page}', $num_pages, $this->url) . '">' . $this->text_last . '</a> ';
            }
        }

        $find = array(
            '{start}',
            '{end}',
            '{total}',
            '{pages}'
        );

        $replace = array(
            ($total) ? (($page - 1) * $limit) + 1 : 0,
            ((($page - 1) * $limit) > ($total - $limit)) ? $total : ((($page - 1) * $limit) + $limit),
            $total,
            $num_pages
        );

        $return = '';

        if ($output) {
            if ($this->output_before && $this->output_after) {
                $return .= $this->output_before . $output . $this->output_after;
            } else {
                $return .= '<div class="' . $this->style_links . '">' . $output . '</div>';
            }
        }

        if ($this->style_results) {
            $return .= '<div class="' . $this->style_results . '">' . str_replace($find, $replace, $this->text) . '</div>';
        }

        return $return;
    }
}

/*
Usage
------

to get this:

<div class="pager skew-25">
    <ul>
        <li><a href="#" class="skew25"><i class="fa fa-angle-left"></i></a></li>
        <li class="selected"><span class="skew25">1</span></li>
        <li><a href="#" class="skew25">2</a></li>
        <li><a href="#" class="skew25">3</a></li>
        <li><a href="#" class="skew25">4</a></li>
        <li><a href="#" class="skew25">5</a></li>
        <li><span class="skew25">...</span></li>
        <li><a href="#" class="skew25">10</a></li>
        <li><a href="#" class="skew25"><i class="fa fa-angle-right"></i></a></li>
    </ul>
</div>

you would do this:

// standard opencart code
$pagination = new Pagination();
$pagination->total = $review_total;
$pagination->page = $page;
$pagination->limit = 5;
$pagination->text = $this->language->get('text_pagination');
$pagination->url = $this->url->link('blog/blog/review', 'blog_id=' . $this->request->get['blog_id'] . '&page={page}');

// new custom code
$pagination->dots_before = '<li><span class="skew25">';
$pagination->dots_after = '</span></li>';
$pagination->current_before = '<li class="selected"><span class="skew25">';
$pagination->current_after = '</span></li>';
$pagination->text_prev = '';
$pagination->text_next = '';
$pagination->prev_before = '<li><a href="{url}" class="skew25"><i class="fa fa-angle-left">';
$pagination->prev_after = '</i></a></li>';
$pagination->next_before = '<li><a href="{url}" class="skew25"><i class="fa fa-angle-right">';
$pagination->next_after = '</i></a></li>';
$pagination->link_before = '<li><a href="{url}" class="skew25">';
$pagination->link_after = '</a></li>';
$pagination->output_before = '<div class="pager skew-25"><ul>';
$pagination->output_after = '</ul></div>';
$pagination->style_results = '';
$pagination->num_links = 7;

*/

?>