CI框架简单分页类

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;  ?>

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