CI框架简单分页类

发布:smiling　来源: PHP粉丝网　添加日期：2022-07-02 08:40:03　浏览: 评论：0　

本文实例讲述了CI框架简单分页类用法，分享给大家供大家参考，具体如下：

/**

*

* 关于页码有效性的判断需要加在控制器中判断，即当页码数<1或者>总页数

*

*/

class Custom_pagination

{

  var $page_url = ''; //分页目标URL

  var $page_size = 10; //每一页行数

  var $page_num = 1;//页码

  var $rows_num= '';//数据总行数

  var $links_num= 3;//选中链接前后的链接数，必须大于等于1



  var $anchor_class= '';//链接样式类

  var $current_class= '';//当前页样式类

  var $full_tag_open= '';//分页开始标签

  var $full_tag_close= '';//分页结束标签

  var $info_tag_open= '';

  var $info_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= '';



  public function __construct($params = array())

  {

    if (count($params) > 0)

    {

      $this->init($params);

    }

  }



  function init($params = array()) //初始化数据

  {

    if (count($params) > 0)

    {

      foreach ($params as $key => $val)

      {

        if (isset($this->$key))

        {

          $this->$key = $val;

        }

      }

    }

  }



  function create_links()

  {

    ///////////////////////////////////////////////////////

    //准备数据

    ///////////////////////////////////////////////////////

    $page_url = $this->page_url;

    $rows_num = $this->rows_num;

    $page_size = $this->page_size;

    $links_num = $this->links_num;



    if ($rows_num == 0 OR $page_size == 0)

    {

      return '';

    }



    $pages = intval($rows_num/$page_size);

    if ($rows_num % $page_size)

    {

      //有余数pages+1

      $pages++;

    };

    $page_num = $this->page_num < 1 ? '1' : $this->page_num;



    $anchor_class = '';

    if($this->anchor_class !== '')

    {

      $anchor_class = 'class="'.$this->anchor_class.'" ';

    }



    $current_class = '';

    if($this->current_class !== '')

    {

      $current_class = 'class="'.$this->current_class.'" ';

    }

    if($pages == 1)

    {

      return '';

    }

    if($links_num < 0)

    {

      return '- -！links_num必须大于等于0';

    }

    ////////////////////////////////////////////////////////

    //创建链接开始

    ////////////////////////////////////////////////////////

    $output = $this->full_tag_open;

    $output .= $this->info_tag_open.'共'.$rows_num.'条数据第 '.$page_num.'/'.$pages.' 页'.$this->info_tag_close;

    //首页

    if($page_num > 1)

    {

      $output .= $this->first_tag_open.'<a '.$anchor_class.' href="'.site_url($page_url).'" rel="external nofollow" >首页</a>'.$this->first_tag_close;

    }

    //上一页

    if($page_num > 1)

    {

      $n = $page_num - 1;

      $output .= $this->prev_tag_open.'<a '.$anchor_class.' href="'.site_url($page_url.'/'.$n).'" rel="external nofollow" rel="external nofollow" >上一页</a>'.$this->prev_tag_close;

    }

    //pages

    for($i=1;$i<=$pages;$i++)

    {

      $pl = $page_num - $links_num < 0 ? 0 : $page_num - $links_num;

      $pr = $page_num + $links_num > $pages ? $pages : $page_num + $links_num;

      //判断链接个数是否太少，举例，假设links_num = 2，则链接个数不可少于 5 个，主要是当page_num 等于 1， 2 和 n，n-1的时候

      if($pr < 2 * $links_num + 1)

      {

        $pr = 2 * $links_num + 1;

      }

      if($pl > $pages-2 * $links_num)

      {

        $pl = $pages - 2 * $links_num;

      }

      if($i == $page_num)

      {  //current page

        $output .= $this->cur_tag_open.'<span '.$current_class.' >'.$i.'</span>'.$this->cur_tag_close;

      }else if($i >= $pl && $i <= $pr)

      {

        $output .= $this->num_tag_open.'<a '.$anchor_class.' href="'.site_url($page_url.'/'.$i).'" rel="external nofollow" >'.$i.'</a>'.$this->num_tag_close;

      }

    }

    //下一页

    if($page_num < $pages)

    {

      $n = $page_num + 1;

      $output .= $this->next_tag_open.'<a '.$anchor_class.' href="'.site_url($page_url.'/'.$n).'" rel="external nofollow" rel="external nofollow" >下一页</a>'.$this->next_tag_close;

    }

    //末页

    if($page_num < $pages)

    {

      $output .= $this->last_tag_open.'<a '.$anchor_class.' href="'.site_url($page_url.'/'.$pages).'" rel="external nofollow" >末页</a>'.$this->last_tag_close;

    }



    $output.=$this->full_tag_close;

    return $output;

  }

}

控制器里调用

$config['page_url']

= 'about/science';

$config['page_size'] = $pagesize;

$config['rows_num'] = $num_rows;

$config['page_num'] = $page;

$this->load->library('Custom_pagination');

$this->custom_pagination->init($config);

echo $this->custom_pagination->create_links();

<?php

class page{



  public $page; //当前页

  public $pagenum; // 页数

  public $pagesize; // 每页显示条数

  public function __construct($count, $pagesize){

    $this->pagenum = ceil($count/$pagesize);

    $this->pagesize = $pagesize;

    $this->page =(isset($_GET['p'])&&$_GET['p']>0) ? intval($_GET['p']) : 1;

  }

  /**

   * 获得 url 后面GET传递的参数

   */

  public function getUrl(){

    $url = 'index.php?'.http_build_query($_GET);

    $url = preg_replace('/[?,&]p=(\w)+/','',$url);

    $url .= (strpos($url,"?") === false) ? '?' : '&';

    return $url;

  }

  /**

   * 获得分页HTML

   */

  public function getPage(){

    $url = $this->getUrl();

    $start = $this->page-5;

    $start=$start>0 ? $start : 1;

    $end  = $start+9;

    $end = $end<$this->pagenum ? $end : $this->pagenum;

    $pagestr = '';

    if($this->page>5){

      $pagestr = "<a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=1".">首页</a> ";

    }

    if($this->page!=1){

      $pagestr.= "<a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".($this->page-1).">上一页</a>";

    }



    for($i=$start;$i<=$end;$i++){

      $pagestr.= "<a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".$i.">".$i."</a> ";

    }

    if($this->page!=$this->pagenum){

      $pagestr.="<a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".($this->page+1).">下一页</a>";



    }

    if($this->page+5<$this->pagenum){

      $pagestr.="<a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".$this->pagenum.">尾页</a> ";

    }

    return $pagestr;

  }



}

// 测试代码

$page = new page(100,10);

$str=$page->getPage();

echo $str;

?>