codeigniter實現ajax無重新整理分頁

我們都知道codeigniter（以下都簡稱CI）有分頁的類庫，現在我們就基於其原生的類庫來建立一個我們所需要的ajax分頁。

首先在  /application/libraries/ 目錄下建立一個 MY_Pagination.php ，代碼如下：

<?php/** *417 add  主要是實現ajax分頁 **/ class MY_Pagination extends CI_Pagination{  public function __construct()    {        parent::__construct();    }    /**   * Generate the pagination links   *   * @accesspublic   * @returnstring   */  function create_ajax_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 '';    }    // Set the base page index for starting page number    if ($this->use_page_numbers)    {      $base_page = 1;    }    else    {      $base_page = 0;    }    // Determine the current page number.    $CI =& get_instance();    if ($CI->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE)    {      if ($CI->input->get($this->query_string_segment) != $base_page)      {        $this->cur_page = $CI->input->get($this->query_string_segment);        // Prep the current page - no funny business!        $this->cur_page = (int) $this->cur_page;      }    }    else    {      if ($CI->uri->segment($this->uri_segment) != $base_page)      {        $this->cur_page = $CI->uri->segment($this->uri_segment);        // Prep the current page - no funny business!        $this->cur_page = (int) $this->cur_page;      }    }        // Set current page to 1 if using page numbers instead of offset    if ($this->use_page_numbers AND $this->cur_page == 0)    {      $this->cur_page = $base_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 = $base_page;    }    // Is the page number beyond the result range?    // If so we show the last page    if ($this->use_page_numbers)    {      if ($this->cur_page > $num_pages)      {        $this->cur_page = $num_pages;      }    }    else    {      if ($this->cur_page > $this->total_rows)      {        $this->cur_page = ($num_pages - 1) * $this->per_page;      }    }    $uri_page_number = $this->cur_page;        if ( ! $this->use_page_numbers)    {      $this->cur_page = floor(($this->cur_page/$this->per_page) + 1);    }    // 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 : $num_pages;    // Is pagination being used over GET or POST?  If get, add a per_page query    // string. If post, add a trailing slash to the base URL if needed    if ($CI->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE)    {      $this->base_url = rtrim($this->base_url).'&'.$this->query_string_segment.'=';    }    else    {      $this->base_url = rtrim($this->base_url, '/') .'/';    }    // And here we go...    $output = '';    // Render the "First" link    if  ($this->first_link !== FALSE AND $this->cur_page > ($this->num_links + 1))    {      $first_url = ($this->first_url == '') ? $this->base_url : $this->first_url;      $output .= $this->first_tag_open.'<a '." onclick='ajax_page(0);return false;'".$this->anchor_class.'href="javascript:void(0)">'.$this->first_link.'</a>'.$this->first_tag_close;    }    // Render the "previous" link    if  ($this->prev_link !== FALSE AND $this->cur_page != 1)    {      if ($this->use_page_numbers)      {        $i = $uri_page_number - 1;      }      else      {        $i = $uri_page_number - $this->per_page;      }      if ($i == 0 && $this->first_url != '')      {        $output .= $this->prev_tag_open.'<a '." onclick='ajax_page(0);return false;'".$this->anchor_class.'href="javascript:void(0)">'.$this->prev_link.'</a>'.$this->prev_tag_close;      }      else      {        $i = ($i == 0) ? '' : $this->prefix.$i.$this->suffix;        $output .= $this->prev_tag_open.'<a '." onclick='ajax_page({$i});return false;'".$this->anchor_class.'href="javascript:void(0)">'.$this->prev_link.'</a>'.$this->prev_tag_close;      }    }    // Render the pages    if ($this->display_pages !== FALSE)    {      // Write the digit links      for ($loop = $start -1; $loop <= $end; $loop++)      {        if ($this->use_page_numbers)        {          $i = $loop;        }        else        {          $i = ($loop * $this->per_page) - $this->per_page;        }        if ($i >= $base_page)        {          if ($this->cur_page == $loop)          {            $output .= $this->cur_tag_open.$loop.$this->cur_tag_close; // Current page          }          else          {            $n = ($i == $base_page) ? '' : $i;            if ($n == '' && $this->first_url != '')            {              $output .= $this->num_tag_open.'<a '." onclick='ajax_page(0);return false;'".$this->anchor_class.'href="javascript:void(0)">'.$loop.'</a>'.$this->num_tag_close;            }            else            {              $n = ($n == '') ? '' : $this->prefix.$n.$this->suffix;              $output .= $this->num_tag_open.'<a '." onclick='ajax_page({$n});return false;'".$this->anchor_class.'href="javascript:void(0)">'.$loop.'</a>'.$this->num_tag_close;            }          }        }      }    }    // Render the "next" link    if ($this->next_link !== FALSE AND $this->cur_page < $num_pages)    {      if ($this->use_page_numbers)      {        $i = $this->cur_page + 1;      }      else      {        $i = ($this->cur_page * $this->per_page);      }      $ajax_p = $this->prefix.$i.$this->suffix;      $output .= $this->next_tag_open.'<a '." onclick='ajax_page({$ajax_p});return false;'".$this->anchor_class.'href="javascript:void(0)">'.$this->next_link.'</a>'.$this->next_tag_close;    }    // Render the "Last" link    if ($this->last_link !== FALSE AND ($this->cur_page + $this->num_links) < $num_pages)    {      if ($this->use_page_numbers)      {        $i = $num_pages;      }      else      {