php相当简单的分页类

class Helper_Page{

/ 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;
/ 下一页　*/
var $nextPageNo;
/* 上一页　/
var $prevPageNo;

function Helper_Page($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;
  }
  }