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php+mysql分页代码详解

WBOY
Release: 2016-06-13 12:29:43
Original
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复制代码 代码如下:


$perpagenum = 10;//定义每页显示几条   
$total = mysql_fetch_array(mysql_query("select count(*) from a"));//查询数据库中一共有多少条数据   
$Total = $total[0];                          //   
$Totalpage = ceil($Total/$perpagenum);//上舍,取整   
if(!isset($_GET['page'])||!intval($_GET['page'])||$_GET['page']>$Totalpage)//page可能的四种状态   
{   
    $page=1;   
}   
else   
{   
    $page=$_GET['page'];//如果不满足以上四种情况,则page的值为$_GET['page']   
}   
$startnum     = ($page-1)*$perpagenum;//开始条数   
$sql = "select * from a order by id limit $startnum,$perpagenum";//查询出所需要的条数   
echo $sql."   
";   
$rs = mysql_query($sql);   
$contents = mysql_fetch_array($rs);   
if($total)如果$total不为空则执行以下语句   
{   
    do   
    {   
    $id = $contents['id'];   
    $name = $contents['name'];   
    ?>   
    

   
       
       
       
       
       
       
    
id:   
       
    
name:   
       
    
   
        }   
while($contents = mysql_fetch_array($rs));//do....while   
$per = $page - 1;//上一页   
$next = $page + 1;//下一页   
echo "
共有".$Total."条记录,每页".$perpagenum."条,共".$Totalpage."页 ";   
if($page != 1)   
{   
echo "首页";   
echo " 上一页";   
}   
if($page != $Totalpage)   
{   
echo " 下一页";   
echo " 尾页
";   
}   
}   
else如果$total为空则输出No message   
{   
echo "
No message
";   
}   
?>
source:php.cn
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