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
如何始终呈现，使用CodeIgniter分页类，上一页和下一页链接为<p>标记，当它们未被使用时？
更新
最终自己解决它。见下面的解决方案在v2.1.3上工作
答案 0 :(得分：9)
以下是解决方案：
通过创建新文件MY_Pagination.php并将其放在application/library文件夹中来扩展Codeigniter分页类。
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，将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>'.$this->next_tag_close;
和elseif语句末尾的另一个if ($this->next_link !== FALSE && $this->cur_page < $num_pages)语句：
elseif ($this->display_next_link && $this->cur_page >= $num_pages)
$output .= $this->next_tag_open.'<span>'.$this->next_link.'</span>'.$this->next_tag_close;
现在，
通过定义$config['display_prev_link']和$config['display_prev_link']等于TRUE或FALSE，您可以控制Previous和Next链接的显示。
以下是完整的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！
答案 1 :(得分：5)
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'])*($this->uri->segment(1)-1);
}
答案 2 :(得分：0)
CI \ SYSTEM \库\ Pagination.php
前
if ($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;
}
}
之后（ADD LAST 3 LINE）
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>';
}
答案 3 :(得分：0)
Codeigniter Pagination Library 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';}else{echo '';} ?>">
<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'] = $this->pagination->result();
IN Codeigniter视图：
foreach ($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 !";
}
});