发个用以保持搜索条件的分页类，简单扩展

jeongee · 发表于 2010-3-10 16:38:28

说明：
对1.7.2的分页类做了一点小小的改动，用以支持形如：http://xxxx.com/article/page/2?key=xx&xx=xx 的连接形式

使用时，只需在传入baseurl的时候加上后面的querystring就好了如：
$config['base_url'] = site_url('admin/article/view')."?q=$this->q&v=$this->v&mode=$this->mode";
具体使用请参见：http://codeigniter.org.cn/forums/thread-4922-1-1.html 源代码

代码如下：

PHP复制代码

<?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) 2008 - 2009, 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 = 0; // 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 = ' <strong>';
var $cur_tag_close = '</strong>';
var $next_tag_open = ' ';
var $next_tag_close = ' ';
var $prev_tag_open = ' ';
var $prev_tag_close = '';
var $num_tag_open = ' ';
var $num_tag_close = '';
var $page_query_string = FALSE;
var $query_string_segment = 'per_page';
var $query_keys = "";

/**
* 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;
}
}
}
$this->split_uri();
}

/**
* 分离url
*
* @access private
* @return no return
*/

private function split_uri(){
$arr = explode('?',$this->base_url);
$this->base_url = $arr[0];
if(count($arr)==2)
$this->query_keys = "?".$arr[1];
}

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

/**
* 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->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE)
{
if ($CI->input->get($this->query_string_segment) != 0)
{
$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) != 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;
}

// Is the page number beyond the result range?
// If so we show the last page
if ($this->cur_page > $this->total_rows)
{
$this->cur_page = ($num_pages - 1) * $this->per_page;
}

$uri_page_number = $this->cur_page;
$this->cur_page = floor(($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 ($this->cur_page > ($this->num_links + 1))
{
$output .= $this->first_tag_open.'<a href="'.$this->base_url.$this->query_keys.'">'.$this->first_link.'</a>'.$this->first_tag_close;
}

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

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

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.$n.$this->query_keys.'">'.$loop.'</a>'.$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 * $this->per_page).$this->query_keys.'">'.$this->next_link.'</a>'.$this->next_tag_close;
}

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

/* End of file Pagination.php */
/* Location: ./system/libraries/Pagination.php */

复制代码

yffeel · 发表于 2010-3-27 14:30:26

请斑竹具体讲解一下。现在正头疼这个问题。搜索条件的分页真是麻烦

jeongee · 发表于 2010-3-27 20:11:44

回复 2# yffeel

呵呵，具体的使用请看我发的http://codeigniter.org.cn/forums/thread-4922-1-1.html
里面有实际应用

yffeel · 发表于 2010-3-29 17:59:13

出现Function split() is deprecated 怎么办？

把split替换成 explode() 好像不行

jeongee · 发表于 2010-3-29 19:37:55

回复 4# yffeel

呵呵，原来PHP5.3把那个干掉了哈，用explode吧
$arr = explode('?',$this->base_url);
你应该没把?前面的反斜杠去掉所以才出错的吧，呵呵

yffeel · 发表于 2010-3-29 20:36:10

谢谢版主。真是热心人！感谢感谢！！

le_el · 发表于 2010-7-14 18:40:02

能写 MY_Pagination.php 形式吗不改CI原文件.

jeongee · 发表于 2010-7-16 09:36:15

回复 7# le_el

可以的吧

飞翔 · 发表于 2010-8-25 16:04:08

学习一下！

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[库 Library] 发个用以保持搜索条件的分页类，简单扩展

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