php+ajax实现无刷新分页

<?php
class Pagination {
  private $total; //数据表中总记录数
  private $listRows; //每页显示行数
  private $limit; //mysql 数据库的limit
  private $uri; //分页信息前面的uri地址
  private $pageNum; //页数
  private $config = array('header' => "个记录","prev" => "【上一页】","next" => "【下一页】","first" => "【首 页】","last" => "【尾 页】");
  private $listNum = 8;
  /*
   * $total 当前信息总条数
   * $listRows 每页显示的条数
   * $pa 下面的page
    http://网址/index.php?page=5
   */
  public function __construct($total,$listRows = 10,$pa = "") {
    $this->total = $total;
    $this->listRows = $listRows;
    $this->uri = $this->getUri($pa);
    $this->page = !empty($_GET["page"]) ? $_GET["page"] : 1;//不传入page,则默认显示首页
    $this->pageNum = ceil($this->total / $this->listRows);
    $this->limit = $this->setLimit();
  }
  //设置每页显示的条数
  private function setLimit() {
    return "Limit " . ($this->page - 1) * $this->listRows . ",{$this->listRows}";
  }
  //获得URL地址
  private function getUri($pa) {
    $url = $_SERVER["REQUEST_URI"] . (strpos($_SERVER["REQUEST_URI"],'?') ? '' : "?") . $pa;
    $parse = parse_url($url);
    if (isset($parse["query"])) {
      parse_str($parse['query'],$params);
      unset($params["page"]);
      $url = $parse['path'] . '?' . http_build_query($params);
    }
    return $url;
  }
  //魔术办法,public function __get($args) {
    if ($args == "limit")
      return $this->limit;
    else
      return null;
  }
  //页面开始的条数
  private function start() {
    if ($this->total == 0)
      return 0;
    else
      return ($this->page - 1) * $this->listRows + 1;
  }
  //页面结束的条数
  private function end() {
    return min($this->page * $this->listRows,$this->total);
  }
  /*设置首页*/
  private function first() {
    $html = "";
    if ($this->page == 1)
      $html.='?'.$this->config["first"].'?';
    else
      $html.="?<a href='void(0)' onclick='showPage("{$this->uri}&page=1")'>{$this->config["first"]}</a>?";
      //$html.="?<a href='{$this->uri}&page=1'>{$this->config["first"]}</a>?";
    return $html;
  }
  /*设置上一页*/
  private function prev() {
    $html = "";
    if ($this->page == 1)
      $html.='?'.$this->config["prev"].'?';
    else
      $html.="?<a href='void(0)' onclick='showPage("{$this->uri}&page=" . ($this->page - 1) . "")'>{$this->config["prev"]}</a>?";
      //$html.="?<a href='{$this->uri}&page=".($this->page-1)."'>{$this->config["prev"]}</a>?";
    return $html;
  }
  //页码列表【首页】【2】【3】…………【尾页】
  private function pageList() {
    $linkPage = "";
    $inum = floor($this->listNum / 2);
    for ($i = $inum; $i >= 1; $i--) {
      $page = $this->page - $i;
      if ($page < 1)
        continue;
      $linkPage.="?<a href='void(0)' onclick='showPage("{$this->uri}&page={$page}")'>{$page}</a>?";
    }
    $linkPage.="?{$this->page}?";
    for ($i = 1; $i <= $inum; $i++) {
      $page = $this->page + $i;
      if ($page <= $this->pageNum)
        $linkPage.="?<a href='void(0)' onclick='showPage("{$this->uri}&page={$page}")'>{$page}</a>?";
      else
        break;
    }
    return $linkPage;
  }
  /*设置下一页*/ 
  private function next() {
    $html = "";
    if ($this->page == $this->pageNum)
      $html.='?'.$this->config["next"].'?';
    else
      $html.="?<a href='void(0)' onclick='showPage("{$this->uri}&page=" . ($this->page + 1) . "")'>{$this->config["next"]}</a>?";
      //$html.="?<a href='{$this->uri}&page=".($this->page + 1)."'>{$this->config["next"]}</a>?";
    return $html;
  }
  /*设置尾页*/
  private function last() {
    $html = "";
    if ($this->page == $this->pageNum)
      $html.='?'.$this->config["last"].'?';
    else
      $html.="?<a href='void(0)' onclick='showPage("{$this->uri}&page=" . ($this->pageNum) . "")'>{$this->config["last"]}</a>?";
      //$html.="?<a href='{$this->uri}&page=.(this->pageNum).'>{$this->config["last"]}</a>?";
    return $html;
  }
  /*设置页面跳转*/
  private function goPage() {
    return 
    '?<input type="text" onkeydown="if(event.keyCode==13){var page=(this.value>' . $this->pageNum . ')?' . $this->pageNum . ':this.value;showPage('' . $this->uri . '&page='+page+'')}" value="' . $this->page . '" style="width:25px">
    <input type="button" value="GO" onclick="var page=(this.previousSibling.value>' . $this->pageNum . ')?' . $this->pageNum . ':this.previousSibling.value;showPage('' . $this->uri . '&page='+page+'')">?';
  }
  //页面列表配置选项
  function fpage($display = array(0,1,2,3,4,5,6,7,8)) {
    $html[0] = "?共有<b>{$this->total}</b>{$this->config["header"]}?";
    $html[1] = "?每页显示<b>" . ($this->end() - $this->start() + 1) . "</b>条,本页<b>{$this->start()}-{$this->end()}</b>条?";
    $html[2] = "?<b>{$this->page}/{$this->pageNum}</b>页?";
    $html[3] = $this->first();
    $html[4] = $this->prev();
    $html[5] = $this->pageList();
    $html[6] = $this->next();
    $html[7] = $this->last();
    $html[8] = $this->goPage();
    $fpage = '';
    foreach ($display as $index) {
      $fpage.=$html[$index];
    }
    return $fpage;
  }
}

<?php
//链接数据库
//获得具体信息
//分页显示
header("content-type:text/html;charset=utf-8");
$link = mysql_connect('localhost','root','222221');
mysql_select_db('shop',$link);
mysql_query("set names utf8");
$css = <<<eof
<style type="text/css">
  table {border:1px solid black; width:700px; margin:auto; border-collapse:collapse;}
  td {border:1px solid black; }
</style>
eof;
echo $css;
echo "
<table>
  <tr><td>序号</td><td>名称</td><td>数量</td><td>价格</td><td>时间</td></tr>
";
//1 引入分页类
include "./Pagination.php";
//2. 获得信息总条数
$sql = "select * from sw_goods";
$qry = mysql_query($sql);
$total = mysql_num_rows($qry);
$per  = 7;
//3. 实例化分页类对象
$page_obj = new Pagination($total,$per);
//4. 拼装sql语句,获得每页信息
//利用page_obj实现limit的灵活设置
//$page_obj -> limit;
$sqla = "select * from sw_goods ".$page_obj->limit;
$qrya = mysql_query($sqla);
//5. 获得页面列表
$pagelist = $page_obj -> fpage(array(3,8));
$i=1;
while($rsta = mysql_fetch_assoc($qrya)){
  echo "<tr>";
  echo "<td>".$i++."</td>";
  echo "<td>".$rsta['goods_name']."</td>";
  echo "<td>".$rsta['goods_number']."</td>";
  echo "<td>".$rsta['goods_price']."</td>";
  echo "<td>".date("Y-m-d H:i:s",$rsta['goods_create_time'])."</td>";
  echo "</tr>";
}
echo "<tr><td colspan=5>".$pagelist."</td></tr>";
echo "</table>";

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
  <head>
    <title>新建网页</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <meta name="description" content="" />
    <meta name="keywords" content="" />
    <script type="text/javascript">
//获得分页信息ajax函数
function showPage(myurl){
  var xhr = new XMLHttpRequest();
  xhr.onreadystatechange = function(){
    if(xhr.readyState==4){
      var rst = document.getElementById("result");
      rst.innerHTML = xhr.responseText;
    }
  }
  xhr.open("get",myurl);
  xhr.send(null);
}
window.onload = function(){
  showPage("./data1.php"); //获得分页信息
  //showPage("./data.php?page=2");
}
    </script>
    <style type="text/css">
    </style>
  </head>
  <body>
    <h2>ajax无刷新分页效果</h2>
    <div id="result"></div>
  </body>
</html>
<script type="text/javascript">
  document.write(new Date()+"<br />");
  document.write(new Date()+"<br />");
  document.write(new Date()+"<br />");
  document.write(new Date()+"<br />");
</script>