一个比较简单的PHP 分页分组类

复制代码 代码如下:
class mysqlPager{
var $pagePerNum=5;//每页显示数据项数
var $pagePerGroup=5;//每分页组中页数
var $curPage=0;//当前页，Defualt 第一页
var $totalPage=0;//总页数
var $totalNum=0;//数据项总数
var $curPageGroup=0;//当前分页组
var $curPageUrl="";//当前用到分页的 URL
var $customStyle="";//自定义风格
var $pageQuerySql="";
function mysqlPager(){//构造函数 PHP4
}

function InitAllVar($totalNum,$pagePerGroup,$curPageUrl,$curPage=1,$curPageGroup=1)
{
$this->totalNum=$totalNum;
$this->pagePerGroup=$pagePerGroup;
$this->curPageUrl=$curPageUrl;
$this->curPage=$curPage;
$this->curPageGroup=$curPageGroup;
}

function setCurPage($curPage)
{
$this->curPage=$curPage;
}

function setCurPageGroup($curPageGroup)
{
$this->curPageGroup=$curPageGroup;
}

function setCurPageUrl($curPageUrl)
{
$this->curPageUrl=$curPageUrl;
}

function getTotalPage($totalNum,$curPage=0)
{
return $this->totalPage=ceil($totalNum/$this->pagePerNum);
}

function setCustomStyle($customStyle)
{
$this->customStyle=$customStyle;
}

function setCustomStyleString($pagerString)
{
return $styleString="".$pagerString."";
}

function showNavPager($curPageGroup=0,$curPage=0,$curPageUrl=0)
{
if($curPageGroup)
{
$this->curPageGroup=$curPageGroup;
}
if($curPage)
{
$this->curPage=$curPage;
}
if($curPageUrl)
{
$this->curPageUrl=$curPageUrl;
}
$rtnString="";
//判断变量是否以经初始化
if($this->curPageGroup && $this->curPageUrl && $this->totalNum && $this->curPage)
{
$this->totalPage=$this->getTotalPage($this->totalNum);
if($this->curPage==1)
$this->curPage=($this->curPageGroup-1)*$this->pagePerGroup+1;
if($this->curPageGroup!=1)
{
$prePageGroup=$this->curPageGroup-1;
$rtnString.="curPageUrl."?cpg=$prePageGroup >".$this->setCustomStyleString("<<")." ";
}
for($i=1;$i<=$this->pagePerGroup;$i++)
{
$curPageNum=($this->curPageGroup-1)*$this->pagePerGroup+$i;
if($curPageNum<=$this->totalPage){
if($curPageNum==$this->curPage)
{
$rtnString.=" ".$this->setCustomStyleString($curPageNum);
}else
{
$rtnString.=" curPageUrl?cpg={$this->curPageGroup}&cp=$curPageNum >";
$rtnString.=$this->setCustomStyleString($curPageNum)."";
}
}
}
if($this->curPageGrouptotalPage/$this->pagePerGroup)-1)
{
$nextPageGroup=$this->curPageGroup+1;
$rtnString.=" curPageUrl?cpg=$nextPageGroup >".$this->setCustomStyleString(">>")."";
}
$this->pageQuerySql=" limit ".(($this->curPage-1)*$this->pagePerNum).",".$this->pagePerNum;

}
else
{
$rtnString="错误：变量未初始化！";
}
return $rtnString;
}

function getQuerySqlStr($sql)
{
$allsql=$sql.$this->pageQuerySql;
return $allsql;
}

function setPagePerNum($num)
{
$this->pagePerNum=$num;
}
}
?>
使用方法：
$curPage=$_GET['cp'];
$curPageGroup=$_GET['cpg']
if($curPage=="")
$curPage=1;
if($curPageGroup=="")
$curPageGroup=1;
//都是从1开始，之前要对传入的数据进行验证，防注入
//。。。
$pager=new MysqlPager();
$pager->initAllVar(...)
$pager->showNavPager();
//后面的SQL可以是任意的输出
$sql="select id form dbname ";
$querysql=$pager->getQuerySqlStr($sql)
//以后用$querysql 查询数据库就可以得到相应的结果集了