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Pagination Mod

Derek Jones edited this page · 5 revisions
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I modified the Pagination class because I needed it to use page number in the links instead of per_page*page_number

Here is the code:


<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 4.3.2 or newer
 *
 * @package        CodeIgniter
 * @author        ExpressionEngine Dev Team
 * @copyright    Copyright (c) 2006, EllisLab, Inc.
 * @license        http://codeigniter.com/user_guide/license.html
 * @link        http://codeigniter.com
 * @since        Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * Pagination Class
 *
 * @package        CodeIgniter
 * @subpackage    Libraries
 * @category    Pagination
 * @author        ExpressionEngine Dev Team
 * @link        http://codeigniter.com/user_guide/libraries/pagination.html
 */
class CI_Pagination {

    var $base_url            = ''; // The page we are linking to
    var $total_rows          = ''; // Total number of items (database results)
    var $per_page             = 10; // Max number of items you want shown per page
    var $num_links            =  2; // Number of "digit" links to show before/after the currently viewed page
    var $cur_page             =  1; // The current page being viewed
    var $first_link           = '‹ First';
    var $next_link            = '>';
    var $prev_link            = '<';
    var $last_link            = 'Last ›';
    var $uri_segment        = 3;
    var $full_tag_open        = '';
    var $full_tag_close        = '';
    var $first_tag_open        = '';
    var $first_tag_close    = ' ';
    var $last_tag_open        = ' ';
    var $last_tag_close        = '';
    var $cur_tag_open        = '&nbsp;<b>';
    var $cur_tag_close        = '</b>';
    var $next_tag_open        = '&nbsp;';
    var $next_tag_close        = '&nbsp;';
    var $prev_tag_open        = '&nbsp;';
    var $prev_tag_close        = '';
    var $num_tag_open        = '&nbsp;';
    var $num_tag_close        = '';

    /**
     * Constructor
     *
     * @access    public
     * @param    array    initialization parameters
     */
    function CI_Pagination($params = array())
    {
        if (count($params) > 0)
        {
            $this->initialize($params);        
        }

        log_message('debug', "Pagination Class Initialized");
    }

    // --------------------------------------------------------------------

    /**
     * Initialize Preferences
     *
     * @access    public
     * @param    array    initialization parameters
     * @return    void
     */
    function initialize($params = array())
    {
        if (count($params) > 0)
        {
            foreach ($params as $key => $val)
            {
                if (isset($this->$key))
                {
                    $this->$key = $val;
                }
            }        
        }
    }

    // --------------------------------------------------------------------

    /**
     * Generate the pagination links
     *
     * @access    public
     * @return    string
     */    
    function create_links()
    {
        // If our item count or per-page total is zero there is no need to continue.
        if ($this->total_rows == 0 OR $this->per_page == 0)
        {
           return '';
        }

        // Calculate the total number of pages
        $num_pages = ceil($this->total_rows / $this->per_page);

        // Is there only one page? Hm... nothing more to do here then.
        if ($num_pages == 1)
        {
            return '';
        }

        // Determine the current page number.        
        $CI =& get_instance();    
        if ($CI->uri->segment($this->uri_segment) != 0)
        {
            $this->cur_page = $CI->uri->segment($this->uri_segment);

            // Prep the current page - no funny business!
            $this->cur_page = (int) $this->cur_page;
        }

        $this->num_links = (int)$this->num_links;

        if ($this->num_links < 1)
        {
            show_error('Your number of links must be a positive number.');
        }

        if ( ! is_numeric($this->cur_page))
        {
            $this->cur_page = 0;
        }

        $uri_page_number = $this->cur_page;
        //$this->cur_page = floor(($this->cur_page/$this->per_page) + 1);
        $this->cur_page = floor($this->cur_page);

        // Calculate the start and end numbers. These determine
        // which number to start and end the digit links with
        $start = (($this->cur_page - $this->num_links) > 0) ? $this->cur_page - ($this->num_links - 1) : 1;
        $end   = (($this->cur_page + $this->num_links) < $num_pages) ? $this->cur_page + $this->num_links : $num_pages;

        // Add a trailing slash to the base URL if needed
        $this->base_url = rtrim($this->base_url, '/') .'/';

          // And here we go...
        $output = '';

        // Render the "First" link
        if  ($this->cur_page > $this->num_links)
        {
            $output .= $this->first_tag_open.'<a href="'.$this->base_url.'">'.$this->first_link.'</a>'.$this->first_tag_close;
        }

        // Render the "previous" link
        if  ($this->cur_page != 1)
        {
            $i = $this->cur_page - 1;
            if ($i == 0) $i = '';
            $output .= $this->prev_tag_open.'<a href="'.$this->base_url.$i.'">'.$this->prev_link.'</a>'.$this->prev_tag_close;
        }

        // Write the digit links
        for ($loop = $start -1; $loop <= $end; $loop++)
        {
            $i = $loop;

            if ($i > 0)
            {
                if ($this->cur_page == $loop)
                {
                    $output .= $this->cur_tag_open.$loop.$this->cur_tag_close; // Current page
                }
                else
                {
                    $n = ($i == 0) ? '' : $i;
                    $output .= $this->num_tag_open.'<a href="'.$this->base_url.$n.'">'.$loop.'</a>'.$this->num_tag_close;
                }
            }
        }

        // Render the "next" link
        if ($this->cur_page < $num_pages)
        {
            $output .= $this->next_tag_open.'<a href="'.$this->base_url.($this->cur_page + 1).'">'.$this->next_link.'</a>'.$this->next_tag_close;
        }

        // Render the "Last" link
        if (($this->cur_page + $this->num_links) < $num_pages)
        {
            $i = $num_pages;
            $output .= $this->last_tag_open.'<a href="'.$this->base_url.$i.'">'.$this->last_link.'</a>'.$this->last_tag_close;
        }

        // Kill double slashes.  Note: Sometimes we can end up with a double slash
        // in the penultimate link so we'll kill all double slashes.
        $output = preg_replace("#([^:])//+#", "\\1/", $output);

        // Add the wrapper HTML if exists
        $output = $this->full_tag_open.$output.$this->full_tag_close;

        return $output;        
    }
}
// END Pagination Class
?&gt;
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