Pagination class for PHP that outputs HTML compatible with Twitter Bootstrap. It uses a sliding scale when displaying the pagination links.

Pagination.php

<?php

/**
 * Pagination class that outputs HTML compatible with Twitter Bootstrap.
 * It uses a sliding scale when displaying the pagination links.
 * 
 * @author Amir Khawaja <[email protected]>
 */
class Pagination
{
    protected $page;
    protected $split = 8;

    /**
     * @param int $currentPage
     * @param int $totalRecords
     * @param int $rowsPerPage
     * @param string $baseUrl
     * @param string $queryString
     */
    public function __construct($currentPage, $totalRecords, $rowsPerPage, $baseUrl = '', $queryString = '')
    {
        $page['rows_per_page'] = $rowsPerPage;
        $page['total_rows'] = $totalRecords;
        $page['current_page'] = $currentPage;
        $page['total_pages'] = ceil($totalRecords / $rowsPerPage);
        $page['next_page'] = (($currentPage + 1) > $page['total_pages']) ? $page['total_pages'] : $currentPage + 1;
        $page['previous_page'] = (($currentPage + 1) > $page['total_pages']) ? $page['total_pages'] : $currentPage - 1;
        $page['base_url'] = $baseUrl;
        $page['query_string'] = $queryString;

        if ($page['total_pages'] == 0) {
            $page['total_pages'] = 1;
        }

        $this->page = $page;
    }

    /**
     * Get the pagination as HTML.
     * @return string
     */
    public function getPaginationHtml()
    {
        $html = '<ul>';
        $url = $this->page['base_url'];
        $qs = $this->page['query_string'];
        $cp = $this->page['current_page'];
        $tp = $this->page['total_pages'];

        $prevPage = ($cp == 1) ? 1 : $cp - 1;
        $nextPage = ($cp == 1) ? 1 : $cp + 1;

        // For Page Sliding
        $padding = floor($this->split / 2);

        // Determine the Page Start and Stop Index
        if ($tp > $this->split) {
            if ($cp >= ($padding + 1)) {
                if ($cp > ($tp - $padding)) {
                    $startIndex = $tp - ($padding * 2);
                    $stopIndex = $tp;
                } else {
                    $startIndex = $cp - $padding;
                    $stopIndex = $cp + $padding;
                }
            } else {
                $startIndex = 1;
                $stopIndex = ($padding * 2) + 1;
            }
        } else {
            $startIndex = 1;
            $stopIndex = $tp;
        }

        if ($this->isFirstPage()) {
            $html .= '<li class="disabled"><span>First</span></li>' . PHP_EOL;
            $html .= '<li class="disabled"><span>&laquo;&nbsp;Prev</span></li>' . PHP_EOL;
        } else {
            if (strpos($qs, '=') > 0) {
                $html .= sprintf('<li><a href="%s?%s&p=%d">First</a></li>', $url, $qs, 1) . PHP_EOL;
                $html .= sprintf('<li><a href="%s?%s&p=%d">&laquo;&nbsp;Prev</a></li>', $url, $qs, $prevPage) . PHP_EOL;
            } else {
                $html .= sprintf('<li><a href="%s?p=%d">First</a></li>', $url, 1) . PHP_EOL;
                $html .= sprintf('<li><a href="%s?p=%d">&laquo;&nbsp;Prev</a></li>', $url, $prevPage) . PHP_EOL;
            }
        }

        for ($i = $startIndex; $i <= $stopIndex; $i++) {
            if ($cp == $i) {
                $html .= sprintf('<li class="active"><span>%d</span></li>', $i) . PHP_EOL;
            } else {
                if (strpos($qs, '=') > 0) {
                    $html .= sprintf('<li><a href="%s?%s&p=%d">%d</a></li>', $url, $qs, $i, $i) . PHP_EOL;
                } else {
                    $html .= sprintf('<li><a href="%s?p=%d">%d</a></li>', $url, $i, $i) . PHP_EOL;
                }
            }
        }

        if ($this->isLastPage()) {
            $html .= '<li class="disabled"><span>Next&nbsp;&raquo;</span></li>' . PHP_EOL;
            $html .= '<li class="disabled"><span>Last</span></li>' . PHP_EOL;
        } else {
            $html .= sprintf('<li><a href="%s?%s&p=%d">Next&nbsp;&raquo;</a></li>', $url, $qs, $nextPage) . PHP_EOL;
            $html .= sprintf('<li><a href="%s?%s&p=%d">Last</a></li>', $url, $qs, $tp) . PHP_EOL;
        }

        $html .= '</ul>' . PHP_EOL;

        return $html;
    }

    public function getPaginationSummary()
    {
        $low = (($this->page['current_page'] - 1) * $this->page['rows_per_page']) + 1;
        $high = ($this->page['total_rows'] <= $this->page['rows_per_page'])
            ? ($this->page['total_rows'])
            : ($low + $this->page['rows_per_page']) - 1;
        $html = sprintf('Displaying %d to %d of %d entries.', $low, $high, $this->page['total_rows']);

        return $html;
    }

    /**
     * Get the pagination data.
     * @return array
     */
    public function getPaginationData()
    {
        return $this->page;
    }

    public function isFirstPage()
    {
        return $this->page['current_page'] == 1;
    }

    public function isLastPage()
    {
        return $this->page['total_pages'] == $this->page['current_page'];
    }
}