PHP 分页类

<?php
/**
* 文件名: page.class.php
* 说明: 分页类
* 作者: 吕耀祖
* 联系方式：email:lvyaozu@163.com
* msn:lvyaozu@hotmail.com
* 创建日期：2007-06-25
*/
class page {
var $perpage= 10; //每页显示多少条记录数
var $total; //总记录数
var $curpage = 1; //当前页码
var $pages; //总页数
var $offset; //记录偏移量
var $filename; //分页文件名称
var $pagename = 'page'; //分页时用来传递参数的变量 如:"$filename?page=$curpage"

function page($total,$perpage,$filename,$pagename) {
$this->total = intval($total);
if(isset($perpage)) $this->perpage = $perpage;
$this->pages = ceil($this->total / $this->perpage);
$this->getcurpage();
$this->offset = ($this->curpage-1)*$this->perpage;
if(isset($pagename)) $this->pagename = $pagename;
if(isset($filename)) {
$this->filename = $filename;
} else {
$this->filename = $_SERVER['PHP_SELF'];
}
}
function getcurpage() {
if(isset($_GET[$this->pagename])) $this->curpage = intval($_GET[$this->pagename]);
if($this->curpage < 1) $this->curpage = 1;
if($this->curpage > $this->pages) $this->curpage = $this->pages;
}

function getfirstpage() {
if($this->curpage == 1) {
return "首页";
} else {
return "<a href=/"{$this->getlink(1)}/">首页</a>";
}
}
function getnextpage() {
$nextpage = $this->curpage + 1;
return "<a href=/"{$this->getlink($nextpage)}/">下一页</a>";
}
function getprepage() {
$prepage = $this->curpage - 1;
return "<a href=/"{$this->getlink($prepage)}/">上一页</a>";
}

function getlastpage() {
if($this->curpage == $this->pages) {
return "尾页";
} else {
return "<a href=/"{$this->getlink($this->pages)}/">尾页</a>";
}
}

function getlink($param) {
if(strpos($this->filename,'?')) {
return $this->filename."&".$this->pagename."=".$param;
} else {
return $this->filename."?".$this->pagename."=".$param;
}
}

function showpage() {
$begin = $this->curpage - 4;
$end = $this->curpage + 5;
if($this->curpage<=4){
$begin = 1;
$end = 10;
}
if($this->curpage > $this->pages-10){
$begin = $this->pages - 10;
$end = $this->pages;
}
if($begin<1){
$begin = 1;
}
if($end>$this->pages){
$end = $this->pages;
}
if($this->total>$this->perpage) {
$pagenav = $this->getfirstpage();
if($this->curpage > 1) {
$pagenav .= $this->getprepage();
}
for($i = $begin; $i <= $end; $i++) {
if($i == $this->curpage) {
$pagenav .= "$i"." ";
} else {
$pagenav .= "<a href=/"{$this->getlink($i)}/">[$i]</a>"." ";
}
}
if($this->curpage < $this->pages) {
$pagenav .= $this->getnextpage();
$pagenav .= $this->getlastpage();
}
}
return $pagenav;
}
}
?>





$conn=mysql_connect('localhost','root','fkedwgwy')
or die('ʧܣ'.mysql_error());

if (mysql_select_db('luowei',$conn))
{
@header("Content-Type: text/html; charset=utf-8");
mysql_query("SET NAMES 'utf8'");
echo'ѡݿɹ'.'<p>';

}
else
{
echo'ݿѡʧܣ'.mysql_error().'<p>';
}

//


$result=mysql_query("select * from news");
$count=mysql_num_rows($result);

$perpage =3;
$total =$count;
$page = new page($total,$perpage,'fenyecg.php','page');
$sql = "select * from news limit $page->offset,$perpage";
$result = mysql_query($sql) or die(mysql_error());
while ($row = mysql_fetch_array($result)) {
echo '标题'.$row['News_Title'].'id号'.$row['News_id'].'时间'.$row['News_time']."<br/>";
}
echo $page->showpage();