PHP ajax realizes paging without refresh, phpajax refresh paging

php ajax implements refresh-free paging, phpajax refreshes paging

This article describes the implementation method of php ajax without refresh paging. Share it with everyone for your reference. The details are as follows:

limit offset, length;
Limit 0,7; First page
Limit 7,7; Second page
Limit 14,7; Page 3
Number of messages per page: 7
Total number of messages: select count(*) from table
Total number of pages of information: ceil rounded up (total number of items/number of items per page)
1. Specific use of paging class

<&#63;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&#63;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"]) &#63; $_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"], '&#63;') &#63; '' : "&#63;") . $pa;

    $parse = parse_url($url);



    if (isset($parse["query"])) {
      parse_str($parse['query'], $params);
      unset($params["page"]);
      $url = $parse['path'] . '&#63;' . http_build_query($params);
    }

    return $url;
  }

  //魔术方法，
  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
      $html.=" <a href='javascript:void(0)' onclick='showPage(\"{$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
      $html.=" <a href='javascript:void(0)' onclick='showPage(\"{$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;

      $linkPage.=" <a href='javascript:void(0)' onclick='showPage(\"{$this->uri}&page={$page}\")'>{$page}</a> ";
    }

    $linkPage.=" {$this->page} ";


    for ($i = 1; $i <= $inum; $i++) {
      $page = $this->page + $i;
      if ($page <= $this->pageNum)
        $linkPage.=" <a href='javascript:void(0)' onclick='showPage(\"{$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
      $html.=" <a href='javascript:void(0)' onclick='showPage(\"{$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
      $html.=" <a href='javascript:void(0)' onclick='showPage(\"{$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="javascript:if(event.keyCode==13){var page=(this.value>' . $this->pageNum . ')&#63;' . $this->pageNum . ':this.value;showPage(\'' . $this->uri . '&page=\'+page+\'\')}" value="' . $this->page . '" style="width:25px">
    <input type="button" value="GO" onclick="javascript:var page=(this.previousSibling.value>' . $this->pageNum . ')&#63;' . $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;
  }

}

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2 Data display

<&#63;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','111111');
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(3,4,5,6,7,8));

$i=1;
while($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>";

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3 Ajax non-refresh paging implementation

open('get','http://url/index.php?page=2')

<!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&#63;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>

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