始终使用 CodeIgniter 分页类显示上一个和下一个链接
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【中文标题】始终使用 CodeIgniter 分页类显示上一个和下一个链接【英文标题】：Always show Previous & Next links using CodeIgniter Pagination Class 【发布时间】：2013-04-08 07:02:36 【问题描述】：问题描述
当我在第一页时，previous 链接没有显示，当我在最后一页时，next 链接也没有显示。我设置了$config['prev_link']='previous' 和$config['next_link']='next'。
问题
如何始终使用 CodeIgniter 分页类将 Previous 和 Next 链接作为<p> 标签在不使用时呈现？
更新 最后自己解决。请参阅下面的解决方案。正在开发 v2.1.3
【问题讨论】：
当链接在这些页面上无用时，您为什么要显示它们？这不会使它非常用户友好，只会让访问者感到困惑。 嗨@crypticツ，我的想法是有一个固定的上一个和下一个图标以及页面编号在它们之间运行，而不是每次都移动所有页面的编号或隐藏不必要的上一个/下一个链接.我的目标不是隐藏它，而是希望将其呈现为标签并在其上应用 CSS，以便将其呈现为非活动链接。
@crypticツ，您对我的解决方案有何看法...？ 我会以不同的方式处理它。好吧，您知道在最后一页上没有下一个链接，在第一页上没有上一个链接。好吧，如果您知道商品数量和每页有多少商品，您就知道哪一页是最后一页，当然您也知道哪一页是第一页。所以我要做的只是检查 URI 段是用于我知道不包含链接的第一页还是最后一页，然后在这些特定页面上回显禁用的下一个/上一个文本版本。所以不需要扩展类。 @crypticツ 我采用了 CodeIgniter 团队的方法并添加了两个变量，以便我可以控制上一个/下一个链接的外观，但我必须说你的解决方案非常好，简单明了。谢谢！ 【参考方案1】：ci\system\libraries\Pagination.php
之前
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 .= $this->prev_tag_open.'<a '.$this->anchor_class.'href="'.$this->first_url.'">'.$this->prev_link.'</a>'.$this->prev_tag_close;
else
$i = ($i == 0) ? '' : $this->prefix.$i.$this->suffix;
$output .= $this->prev_tag_open.'<a '.$this->anchor_class.'href="'.$this->base_url.$i.'">'.$this->prev_link.'</a>'.$this->prev_tag_close;
在（添加最后 3 行）之后
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 .= $this->prev_tag_open.'<a '.$this->anchor_class.'href="'.$this->first_url.'">'.$this->prev_link.'</a>'.$this->prev_tag_close;
else
$i = ($i == 0) ? '' : $this->prefix.$i.$this->suffix;
$output .= $this->prev_tag_open.'<a '.$this->anchor_class.'href="'.$this->base_url.$i.'">'.$this->prev_link.'</a>'.$this->prev_tag_close;
else
$output .= '<span class="hidden">'.$this->prev_link.'</span>';
【讨论】：
不幸的是，它没有解决我的问题，因为它不包括 $config['prev_tag_open'] 和 $config['prev_tag_close'] 并且只处理上一页而不是下一页嗯...【参考方案2】：解决方法如下：
通过创建一个新文件来扩展 Codeigniter 分页类：MY_Pagination.php 并将其放在 application/library 文件夹中。
将所有变量和类前缀声明从 protected 更改为 public。
在 MY_Pagination.php 中定义两个公共变量：$display_prev_link 和 $display_next_link，并将其设置为 FALSE。
在 create_links() 函数中，在 if ($this->prev_link !== FALSE && $this->cur_page !== 1) 语句的末尾添加 elseif 语句：
elseif ($this->display_prev_link && $this->cur_page === 1)
$output .= $this->prev_tag_open.'<span>'.$this->prev_link.'</span>'.$this->next_tag_close;
和另一个elseif 语句到if ($this->next_link !== FALSE && $this->cur_page < $num_pages) 语句的末尾：
elseif ($this->display_next_link && $this->cur_page >= $num_pages)
$output .= $this->next_tag_open.'<span>'.$this->next_link.'</span>'.$this->next_tag_close;
那么现在，
通过将$config['display_prev_link'] 和$config['display_prev_link'] 定义为等于TRUE 或FALSE，您可以控制Previous 和Next 链接的显示。
这是完整的application/library/MY_Pagination.php 文件：
<?php
// Extends the Pagination Class
// Add an option of presenting the PREVIOUS and NEXT links when they're not needed.
// by setting $display_prev_link - and - $display_next_link to true
// !!! EDITIONS => LINES 263 AND 316 !!!
defined('BASEPATH') OR exit('No direct script access allowed');
class MY_Pagination extends CI_Pagination
public $display_prev_link = false;
public $display_next_link = false;
public $base_url = '';
public $prefix = '';
public $suffix = '';
public $total_rows = 0;
public $per_page = 10;
public $num_links = 2;
public $cur_page = 0;
public $use_page_numbers = FALSE;
public $first_link = '‹ First';
public $next_link = '>';
public $prev_link = '<';
public $last_link = 'Last ›';
public $uri_segment = 3;
public $full_tag_open = '';
public $full_tag_close = '';
public $first_tag_open = '';
public $first_tag_close = '';
public $last_tag_open = '';
public $last_tag_close = '';
public $first_url = '';
public $cur_tag_open = '<strong>';
public $cur_tag_close = '</strong>';
public $next_tag_open = '';
public $next_tag_close = '';
public $prev_tag_open = '';
public $prev_tag_close = '';
public $num_tag_open = '';
public $num_tag_close = '';
public $page_query_string = FALSE;
public $query_string_segment = 'per_page';
public $display_pages = TRUE;
public $_attributes = '';
public $_link_types = array();
public $reuse_query_string = FALSE;
public $data_page_attr = 'data-ci-pagination-page';
// --------------------------------------------------------------------
/**
* Constructor
*
* @param array $params Initialization parameters
* @return void
*/
public function __construct($params = array())
$this->initialize($params);
log_message('debug', 'Pagination Class Initialized');
// --------------------------------------------------------------------
/**
* Initialize Preferences
*
* @param array $params Initialization parameters
* @return void
*/
public function initialize($params = array())
$attributes = array();
if (isset($params['attributes']) && is_array($params['attributes']))
$attributes = $params['attributes'];
unset($params['attributes']);
// Deprecated legacy support for the anchor_class option
// Should be removed in CI 3.1+
if (isset($params['anchor_class']))
empty($params['anchor_class']) OR $attributes['class'] = $params['anchor_class'];
unset($params['anchor_class']);
$this->_parse_attributes($attributes);
if (count($params) > 0)
foreach ($params as $key => $val)
if (isset($this->$key))
$this->$key = $val;
// --------------------------------------------------------------------
/**
* Generate the pagination links
*
* @return string
*/
public function create_links()
// If our item count or per-page total is zero there is no need to continue.
if ($this->total_rows === 0 OR $this->per_page === 0)
return '';
// Calculate the total number of pages
$num_pages = (int) ceil($this->total_rows / $this->per_page);
// Is there only one page? Hm... nothing more to do here then.
if ($num_pages === 1)
//$uri_page_number = 1;
//return '';
// Set the base page index for starting page number
$base_page = ($this->use_page_numbers) ? 1 : 0;
// Determine the current page number.
$CI =& get_instance();
// See if we are using a prefix or suffix on links
if ($this->prefix !== '' OR $this->suffix !== '')
$this->cur_page = (int) str_replace(array($this->prefix, $this->suffix), '', $CI->uri->rsegment($this->uri_segment));
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 = (int) $CI->input->get($this->query_string_segment);
elseif ( ! $this->cur_page && $CI->uri->segment($this->uri_segment) !== $base_page)
$this->cur_page = (int) $CI->uri->rsegment($this->uri_segment);
// Set current page to 1 if it's not valid or if using page numbers instead of offset
if ( ! is_numeric($this->cur_page) OR ($this->use_page_numbers && $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.');
// 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 = $num_pages;
elseif ($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)
$this->cur_page = (int) floor(($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)
$segment = (strpos($this->base_url, '?')) ? '&' : '?';
$this->base_url = rtrim($this->base_url).$segment.$this->query_string_segment.'=';
else
$this->base_url = rtrim($this->base_url, '/') .'/';
// And here we go...
$output = '';
$query_string = '';
// Add anything in the query string back to the links
// Note: Nothing to do with query_string_segment or any other query string options
if ($this->reuse_query_string === TRUE)
$get = $CI->input->get();
// Unset the controll, method, old-school routing options
unset($get['c'], $get['m'], $get[$this->query_string_segment]);
if ( ! empty($get))
// Put everything else onto the end
$query_string = (strpos($this->base_url, '?') !== FALSE ? '&' : '?')
.http_build_query($get, '', '&');
// Add this after the suffix to put it into more links easily
$this->suffix .= $query_string;
// Render the "First" link
if ($this->first_link !== FALSE && $this->cur_page > ($this->num_links + 1))
$first_url = ($this->first_url === '') ? $this->base_url : $this->first_url;
// Take the general parameters, and squeeze this pagination-page attr in there for JS fw's
$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, 1);
$output .= $this->first_tag_open.'<a href="'.$first_url.'"'.$attributes.$this->_attr_rel('start').'>'
.$this->first_link.'</a>'.$this->first_tag_close;
// Render the "previous" link
if ($this->prev_link !== FALSE && $this->cur_page !== 1)
$i = ($this->use_page_numbers) ? $uri_page_number - 1 : $uri_page_number - $this->per_page;
// Take the general parameters, and squeeze this pagination-page attr in there for JS fw's
$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);
if ($i === $base_page && $this->first_url !== '')
$output .= $this->prev_tag_open.'<a href="'.$this->first_url.$query_string.'"'.$attributes.$this->_attr_rel('prev').'>'
.$this->prev_link.'</a>'.$this->prev_tag_close;
else
$append = ($i === $base_page) ? $query_string : $this->prefix.$i.$this->suffix;
$output .= $this->prev_tag_open.'<a href="'.$this->base_url.$append.'"'.$attributes.$this->_attr_rel('prev').'>'
.$this->prev_link.'</a>'.$this->prev_tag_close;
// !!!!!!!! START EDITION !!!!!!!!!!
elseif ($this->display_prev_link && $this->cur_page === 1)
$output .= $this->prev_tag_open.'<span>'.$this->prev_link.'</span>'.$this->next_tag_close;
// !!!!!!!! END EDITION !!!!!!!!!!
// Render the pages
if ($this->display_pages !== FALSE)
// Write the digit links
for ($loop = $start -1; $loop <= $end; $loop++)
$i = ($this->use_page_numbers) ? $loop : ($loop * $this->per_page) - $this->per_page;
// Take the general parameters, and squeeze this pagination-page attr in there for JS fw's
$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);
if ($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 === '' && ! empty($this->first_url))
//$output .= $this->num_tag_open.'<a href="'.$this->first_url.$query_string.'"'.$attributes.$this->_attr_rel('start').'>'
// .$loop.'</a>'.$this->num_tag_close;
else
$append = ($n === '') ? $query_string : $this->prefix.$n.$this->suffix;
$output .= $this->num_tag_open.'<a href="'.$this->base_url.$append.'"'.$attributes.$this->_attr_rel('start').'>'
.$loop.'</a>'.$this->num_tag_close;
// Render the "next" link
if ($this->next_link !== FALSE && $this->cur_page < $num_pages)
$i = ($this->use_page_numbers) ? $this->cur_page + 1 : $this->cur_page * $this->per_page;
// Take the general parameters, and squeeze this pagination-page attr in there for JS fw's
$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);
$output .= $this->next_tag_open.'<a href="'.$this->base_url.$this->prefix.$i.$this->suffix.'"'.$attributes
.$this->_attr_rel('next').'>'.$this->next_link.'</a>'.$this->next_tag_close;
// !!!!!!!! START EDITION !!!!!!!!!!
elseif ($this->display_next_link && $this->cur_page >= $num_pages)
$output .= $this->next_tag_open.'<span>'.$this->next_link.'</span>'.$this->next_tag_close;
// !!!!!!!! END EDITION !!!!!!!!!!
// Render the "Last" link
if ($this->last_link !== FALSE && ($this->cur_page + $this->num_links) < $num_pages)
$i = ($this->use_page_numbers) ? $num_pages : ($num_pages * $this->per_page) - $this->per_page;
// Take the general parameters, and squeeze this pagination-page attr in there for JS fw's
$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);
$output .= $this->last_tag_open.'<a href="'.$this->base_url.$this->prefix.$i.$this->suffix.'"'.$attributes.'>'
.$this->last_link.'</a>'.$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
return $this->full_tag_open.$output.$this->full_tag_close;
// --------------------------------------------------------------------
/**
* Parse attributes
*
* @param array $attributes
* @return void
*/
public function _parse_attributes($attributes)
isset($attributes['rel']) OR $attributes['rel'] = TRUE;
$this->_link_types = ($attributes['rel'])
? array('start' => 'start', 'prev' => 'prev', 'next' => 'next')
: array();
unset($attributes['rel']);
$this->_attributes = '';
foreach ($attributes as $key => $value)
$this->_attributes .= ' '.$key.'="'.$value.'"';
// --------------------------------------------------------------------
/**
* Add "rel" attribute
*
* @link http://www.w3.org/TR/html5/links.html#linkTypes
* @param string $type
* @return string
*/
public function _attr_rel($type)
if (isset($this->_link_types[$type]))
unset($this->_link_types[$type]);
return ' rel="'.$type.'"';
return '';
/* End of file Pagination.php */
/* Location: ./system/libraries/Pagination.php */
并且不要忘记根据您的需要将$config['$display_prev_link'] 和$config['$display_next_link'] 设置为true 或false。
祝你好运！
【讨论】：
嗨！我是codeigniter的新手，我按照你的脚本做了。但它会产生一个错误 - 致命错误：第 3 行的 /var/www/HMVC_Test/application/libraries/MY_Pagination.php 中未找到 Class 'CI_Pagination' @AlpeshTrivedi 检查您的 application/config.php 中有一行 $config['subclass_prefix'] = 'MY_';然后再试一次。它对我很有用，我只能猜测您的其中一个设置搞砸了。另外我不明白您为什么将库文件夹更改为库...将其改回原来的名称并重试 感谢您的回复！！但我没有将库更改为库，它带有 codeigniter。 :)【参考方案3】：示例：http://www.friv100flash.com/
$config['base_url'] = base_url(); // xác định trang phân trang
$config['total_rows'] = $this->Game_model->count_all(); // xác định tổng số record
$config['per_page'] = 120; // xác định số record ở mỗi trang
$config['uri_segment'] = 1; // xác định segment chứa page number
$config['num_links'] = 7;
$config['display_pages'] = TRUE;
$config['use_page_numbers'] = TRUE;
//Encapsulate whole pagination
$config['full_tag_open'] = '<ul class="pagination">';
$config['full_tag_close'] = '</ul>';
//First link of pagination
$config['first_link'] = 'First';
$config['first_tag_open'] = '<li>>';
$config['first_tag_close'] = '</li>';
//Customizing the “Digit” Link
$config['num_tag_open'] = '<li>';
$config['num_tag_close'] = '</li>';
//For PREVIOUS PAGE Setup
$config['prev_link'] = 'prev';
$config['prev_tag_open'] = '<li>';
$config['prev_tag_close'] = '</li>';
//For NEXT PAGE Setup
$config['next_link'] = 'Next';
$config['next_tag_open'] = '<li>';
$config['next_tag_close'] = '</li>';
//For LAST PAGE Setup
$config['last_link'] = 'Last';
$config['last_tag_open'] = '<li>';
$config['last_tag_close'] = '</li>';
//For CURRENT page on which you are
$config['cur_tag_open'] = '<li class="active"><a href="#">';
$config['cur_tag_close'] = '</a></li>';
$this->pagination->initialize($config);
if($this->uri->segment(1) == 0)
$offset = 0;
else
$offset = ($config['per_page'])*($this->uri->segment(1)-1);
【讨论】：
【参考方案4】：Codeigniter 分页库 pagination.php
class CI_Pagination
public $limit;
public $active_page;
public $query;
public $url;
function run_query()
$CI= &get_instance();
$query= $CI->db->query($this->query)->result_array();
return $query;
function result()
$CI= &get_instance();
$limit_start=($this->active_page - 1) * $this->limit;
$limit_end=$this->limit;
$query=$this->query.' order by id desc limit '.$limit_start.','.$limit_end;
$query= $CI->db->query($query)->result_array();
return $query;
function size()
return sizeof($this->run_query());
function page_number()
?>
<ul class="pagination no-margin">
<li class="prev <?php if($this->active_page <= '1')echo 'disabled';elseecho ''; ?>">
<a href="<?= $this->url ?>page=<?= $this->active_page-1 ?>">
<i class="ace-icon fa fa-angle-double-left"></i>
</a>
</li>
<?php
if($this->active_page >=10)$i=$this->active_page-8;else$i=2;
$end_point=ceil($this->size()/$this->limit);
?>
<li class="<?php if($this->active_page==$i)echo 'active'; ?>">
<a href="<?= $this->url ?>page=1">1</a>
</li>
<li class="<?php if($this->active_page<=10)echo 'hide'; ?>">
<a href="<?= $this->url ?>page=<?= $this->active_page-1 ?>">...</a>
</li>
<?php $n=1; for($i;$i<=$end_point-1;$i++) if($n++ >=10)break;?>
<li class="<?php if($this->active_page==$i)echo 'active'; ?>">
<a href="<?= $this->url ?>page=<?= $i ?>"><?= $i ?></a>
</li>
<?php ?>
<li class="<?php if($this->active_page>=($end_point-5))echo 'hide'; ?>">
<a href="<?= $this->url ?>page=<?= $this->active_page+1 ?>">...</a>
</li>
<li class="<?php if($this->active_page==$i)echo 'active'; ?>">
<a href="<?= $this->url ?>page=<?= $end_point .'">'. $end_point ?></a>
</li>
<li class="next <?php if($this->active_page >=ceil($this->size()/$this->limit))echo'disabled';?>">
<a href="<?= $this->url ?>page=<?= $this->active_page+1 ?>">
<i class="ace-icon fa fa-angle-double-right"></i>
</a>
</li>
</ul>
<?php
在 Codeigniter 控制器中
$this->load->library('pagination');
$this->pagination->active_page = $page;
$this->pagination->url = base_url('admins/popup?');
$this->pagination->limit='50';
$this->pagination->query='select * from contact where admin_id like "%'.$data["client_id"][0]["client_id"].'%"';
$this->pagination->run_query();
$data['pagination_data'] = $this->pagination->result();
在 Codeigniter 视图中：
foreach ($pagination_data as $fet)
$this->pagination->page_number();
jQuery :
$(document).ready(function()
if($('#example >tbody >tr').length <=0)
var row= document.getElementById("example").insertRow(-1);
var cell1 = row.insertCell(0).colSpan=12;
var cell1 = row.insertCell(0);
cell1.innerHTML = "Result Not Found !";
);
【讨论】：
使用引导程序和表ID应该是foreach循环中的#example以上是关于始终使用 CodeIgniter 分页类显示上一个和下一个链接的主要内容，如果未能解决你的问题，请参考以下文章