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php实现分页工具类分享

WBOY
Release: 2016-06-06 20:25:45
Original
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本文分享一个php实现的分页工具类,代码内有注释,大家参考使用吧

代码:

复制代码 代码如下:


    /**
    * 把中间的看成一个可以滑动的固定长度的尺子
    *
    * 把$this->_totalShowPages 当成一个可以滑动的固定长度尺子,
    * 然后$this->_totalPages就是一个给定长度的木块,尺子在这个
    * 木块上滑动。情况两种:
    * 1. 尺子长度大于木块长度,,那么就直接输出所有的页码;
    * 2. 尺子长度小于木块长度,那么就只用找到输出这个尺子长度页
    * 数的起始点——$start, $end;
    * @Access protected
    * @Return void
    * @Exception none
    */
    protected function _getShowPageNumber()
    {
    $pageHtml = '';
    //找到$start点
    if($this->_curPage - 2 > 1) {
    $start = $this->_curPage - 2;
    } else {
    $start = 1;
    }
    //找到$end 点
    $end = $start + $this->_totalShowPages;
    if($end >= $this->_totalPages) {
    $end = $this->_totalPages;
    $start = $end - $this->_totalShowPages; //保证页面显示的长度为$this->_totalShowPages
    }
    if($start != 1) {
    $pageHtml .= $this->_getPageHtml(1);
    $preMore = $this->_curPage - $this->_totalShowPages;
    if($preMore     $preMore = 1;
    }
    $pageHtml .= $this->_getMorePageHtml($preMore);
    }
    for($page = $start; $page     $pageHtml .= $this->_getPageHtml($page);
    }
    if($end != $this->_totalPages) {
    $pageHtml .= $this->_getMorePageHtml($end);
    }
    $pageHtml .= $this->_getNormalPageHtml($this->_totalPages);

    return $pageHtml;
    }
 

第一种老想法的代码实现:

复制代码 代码如下:


    /**
    * 一步步的来
    *
    * @desc
    *
    * @Access protected
    * @Return void
    * @Exception none
    */
    protected function _getShowPageNumberTwo()
    {
    if($this->_curPage _totalShowPages) {
    for($page = 1; $page _totalShowPages; $page ++) {
    $pageHtml .= $this->_getPageHtml($page);
    }
    $pageHtml .= $this->_getMorePageHtml($this->_totalShowPages);
    $pageHtml .= $this->_getNormalPageHtml($this->_totalPages);
    } else {
    $pageHtml .= $this->_getNormalPageHtml(1);
    if($this->_curPage == $this->_totalShowPages) {
    $pageHtml .= $this->_getMorePageHtml(1);
    } else {
    $pageHtml .= $this->_getMorePageHtml($this->_curPage - $this->_totalShowPages);
    }
    if($this->_curPage + $this->_totalShowPages >= $this->_totalPages) {
    for($page = $this->_totalPages - $this->_totalShowPages; $page _totalPages; $page ++) {
    $pageHtml .= $this->_getPageHtml($page);
    }
    } else {
    $start = $this->_curPage - 2;
    $end = $this->_curPage + $this->_totalShowPages - 2;
    for($page = $start; $page     $pageHtml .= $this->_getPageHtml($page);
    }
    $pageHtml .= $this->_getMorePageHtml($this->_curPage + $this->_totalShowPages - 2);
    $pageHtml .= $this->_getNormalPageHtml($this->_totalPages);
    }
    }

    return $pageHtml;
    }
   

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