<?php
//
// +----------------------------------------------------------------------+
// | 分页类 |
// +----------------------------------------------------------------------+
// | copyright (c) 2001 netfish software |
// | |
// | author: whxbb(whxbbh@21cn.com) |
// +----------------------------------------------------------------------+
//
// $id: pager.class.php,v 0.1 2001/8/2 13:18:13 yf exp $
//
// 禁止直接访问该页面
if (basename($http_server_vars['php_self']) == "pager.class.php") {
header("http/1.0 404 not found");
}
/**
* 分页类
* purpose
* 分页
*
* @author : whxbb(whxbb@21cn.com)
* @version : 0.1
* @date : 2001/8/2
*/
class pager
{
/** 总信息数 */
var $infocount;
/** 总页数 */
var $pagecount;
/** 每页显示条数 */
var $items;
/** 当前页码 */
var $pageno;
/** 查询的起始位置 */
var $startpos;
var $nextpageno;
var $prevpageno;
function pager($infocount, $items, $pageno)
{
$this->infocount = $infocount;
$this->items = $items;
$this->pageno = $pageno;
$this->pagecount = $this->getpagecount();
$this->adjustpageno();
$this->startpos = $this->getstartpos();
}
function adjustpageno()
{
if($this->pageno == '' || $this->pageno < 1)
$this->pageno = 1;
if ($this->pageno > $this->pagecount)
$this->pageno = $this->pagecount;
}
/**
* 下一页
*/
function gotonextpage()
{
$nextpageno = $this->pageno + 1;
if ($nextpageno > $this->pagecount)
{
$this->nextpageno = $this->pagecount;
return false;
}
$this->nextpageno = $nextpageno;
return true;
}
/**
* 上一页
*/
function gotoprevpage()
{
$prevpageno = $this->pageno - 1;
if ($prevpageno < 1)
{
$this->prevpageno = 1;
return false;
}
$this->prevpageno = $prevpageno;
return true;
}
function getpagecount()
{
return ceil($this->infocount / $this->items);
}
function getstartpos()
{
return ($this->pageno - 1) * $this->items;
}
}
?>
