<?php
//通用分页类
class myPage extends myConn{
	function getpage($field,$table,$where,$order='',$pageSize=10,$linkNum=7,$page=1,$conn=''){
		if($conn) $this->links($conn);
		if(!preg_match('/^[0-9]+$/i',$page) || !$page) $page=1;

		$sql="select $field from $table ";
	 	if($where){ $sql.=" WHERE $where "; }
		if($order){ $sql.=" order by $order "; }
		$totalNum=$this->getcount($sql);//总数
		$rs=$this->query($sql);
		$maxPage = (int)ceil($totalNum/$pageSize); //得到最大页码数 $maxPage
		if((int)$page>$maxPage) $page=$maxPage;
		if(mssql_data_seek($rs,($page-1)*$pageSize)){
			for($p=0;$p<$pageSize;$p++){
			  	$row=$this->getfetch($rs);
			  	$Snum=$totalNum-$p-($pageSize*$page)+$pageSize;//序列号
			  	if($row) $rot[]=$row+array("Snum"=>$Snum);
			}
		}
		$this->start=($page-round($linkNum/2))>0 ? ($page-round($linkNum/2)) : "1";
		$this->end=($page+round($linkNum/2))<$maxPage ? ($page+round($linkNum/2)) : $maxPage;
		$this->maxPage=$maxPage;//最大页码
		$this->pageSize=$pageSize;//每页显示
		$this->linkNum=$linkNum;//链接显示数
		$this->totalNum=$totalNum;//总数
		$this->page=$page;//当前页
		return $rot;
		unset($sql,$rs,$row,$rot);
		if($conn) $this->close();
	}
	
	function getpages($sql,$pageSize=10,$linkNum=7,$page=1,$conn=''){
		if($conn) $this->links($conn);
		if(!preg_match('/^[0-9]+$/i',$page) || !$page) $page=1;
		$totalNum=$this->getcount($sql);//总数
		$rs=$this->query($sql);
		$maxPage = (int)ceil($totalNum/$pageSize); //得到最大页码数 $maxPage
		if((int)$page>$maxPage) $page=$maxPage;
		if(mssql_data_seek($rs,($page-1)*$pageSize)){
			for($p=0;$p<$pageSize;$p++){
			  	$row=$this->getfetch($rs);
			  	$Snum=$totalNum-$p-($pageSize*$page)+$pageSize;//序列号
			  	if($row) $rot[]=$row+array("Snum"=>$Snum);
			}
		}
		$this->start=($page-round($linkNum/2))>0 ? ($page-round($linkNum/2)) : "1";
		$this->end=($page+round($linkNum/2))<$maxPage ? ($page+round($linkNum/2)) : $maxPage;
		$this->maxPage=$maxPage;//最大页码
		$this->pageSize=$pageSize;//每页显示
		$this->linkNum=$linkNum;//链接显示数
		$this->totalNum=$totalNum;//总数
		$this->page=$page;//当前页
		return $rot;
		unset($sql,$rs,$row,$rot);
		if($conn) $this->close();
	}
	function getpagecs(){ //获取分页参数
		$myarray = array('Page'=>$this->page,'Start'=>$this->start,'End'=>$this->end,'maxPage'=>$this->maxPage,'pageSize'=>$this->pageSize,'linkNum'=>$this->linkNum,'totalNum'=>$this->totalNum);
		return $myarray;
	}
	function __destruct(){//释放类
  }
}
?>