//1.设置页大小（即在一页内显示多少条数据）
$page_size=#;
//2.计算记录总数（共有多少条数据）
$sql="select count(*) from table_name";
$res=mysql_query($sql);
$data=mysql_fetch_assoc($res);
mysql_free_result($res);
$count=$data['count(*)'];
if($count==0){
    //当无数据时
    $page_count=1;
    $page_num=1;
    $limit="";
}else{
    //3.计算页总数（共需多少页来显示所有数据）
    $page_count=ceil($count/$page_size);  //进一法取整
    //4.获取当前页码
    $page_num=empty($_GET['page'])?1:$_GET['page'];
    //5.过滤越界
    if($page_num<1){
        $page_num=1;
    }elseif($page_num>$page_count){
        $page_num=$page_count;
    }
    //6.组装sql语句
    $limit=" limit ".($page_num-1)*$page_size.",".$page_size;
}
//7.准备sql语句
$sql="select * from table_name order by id".$limit;
//8.发送sql语句
$res=mysql_query($sql);
//9.添加分页的超链接      
?>

<a href="?page=1">首页</a>
<a href="?page=<?php echo ($page_num-1);?>">上一页</a>
<a href="?page=<?php echo ($page_num+1);?>">下一页</a>
<a href="?page=<?php echo ($page_count);?>">尾页</a>
当前第<?php echo $page_num;?>页
共<?php echo $page_count;?>页
本页有<?php
    if($count==0){
        echo $count;
    }else{
        echo ($page_num!=$page_count || $count%$page_size==0)?$page_size:($count%$page_size);
    }
?>条数据
共<?php echo $count;?>条数据