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<?php
class Page
{
private $pageSize;//每一页多少行
private $absolutePage;//当前页
private $pageCount;//总页码数
private $totalNum;//总行数
private $prePage;//
private $nextPage; //
private $sqlStr;
private $baseUrl; //不带GET参数的URL get传输网址
function __construct($pagesize,$absolutepage,$baseurl,$sqlStr)
{
$this->absolutePage = $absolutepage;
$this->pageSize = $pagesize;
$this->baseUrl = $baseurl;
$this->sqlStr = $sqlStr;
}
//显示主体内容
public function listinfo()
{
$result = DBHelper::ExecuteCommand($this->sqlStr);
// $result = mysql_query($this->sqlStr,$conn);
$this->totalNum = mysql_num_rows($result);//取处结果集的所有行数
$this->pageCount = (int)(($this->totalNum -1)/$this->pageSize)+1; //计算出一共有多少页
if($this->absolutePage == "" || !is_numeric($this->absolutePage))//如果是页面第一次加载那么absolutePage的值一定是空的这时我们认为用户是第一次访问就给他看第一页（当然你如果想给他看第5页也可以)
{
$this->absolutePage = 1;//给他看第一页
}
if($this->absolutePage > $this->pageCount)//如果请求的的页码超过了总页数我们就显示最后一页
{
$this->absolutePage = $this->pageCount;//显示最后一页
}
if ($this->totalNum > 1 && $this->absolutePage > 1) //如果满足显示的条件我们就让的页码变量的值等于当前页(absolutePage)减一
{
$this->prePage = $this->absolutePage -1;
}
if($this->absolutePage >= 1 && $this->absolutePage < $this->pageCount)//在当前页至少是1并且不大于总页数时给变量赋值为当前页加1
{
$this->nextPage = $this->absolutePage + 1;
}
if (mysql_data_seek($result,($this->absolutePage -1) * $this->pageSize))//决定从结果集的哪个位置开始检索数据//决定从结果集的哪个位置开始检索数据 mysql_data_seek指向下一行
{
include("goodsTemplate.php");
for ($i = 0; $i < $this->pageSize; $i++)
{
if(($info = mysql_fetch_array($result)))
{
$name = $info['GoodsName'];
$tupian = $info['GoodsPhopo'];
$id = $info['GoodsId'];
$price = $info['GoodsPrice'];
$url = 'detail.php?id='.$id;
$items = str_replace(array('{name}','{tupian}','{url}','{price}','{id}'),array($name,$tupian,$url,$price,$id),$goodsContent);//str_replace替换两个数组 第二个替换第一个数组，$goodsContent参数是要替换的对象
$cishu++;
echo $items;
if ($cishu % 4 == 0)
{
?>
</tr><tr>
<?php
}
}
}
}
}
//分页动作函数
public function toPage()
{
include('toPageTemplate.php');
if($this->totalNum > 1 && $this->absolutePage > 1)
{
$this->prePage = $this->absolutePage - 1;
}
if($this->absolutePage >= 1 && $this->absolutePage < $this->pageCount)
{
$this->nextPage = $this->absolutePage + 1;
}
$preUrl = $this->baseUrl."?absolutePage=$this->prePage";
$nextUrl = $this->baseUrl."?absolutePage=$this->nextPage";
$items = str_replace(array('{totalNum}','{absolutePage}','{pageCount}','{preUrl}','{nextUrl}'),array($this->totalNum,$this->absolutePage,$this->pageCount,$preUrl,$nextUrl),$toPage);
echo $items;
}
}
?>
php技术：PHP 翻页 实例代码，转载需保留来源！
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