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How to implement data paging without refreshing in php ajax_php skills
How to implement data paging without refreshing in php ajax_php skills
The example in this article describes the method of implementing refresh-free paging using php ajax. Share it with everyone for your reference. The specific implementation method is as follows:
index.php file, the code is as follows:
<?php
header("Content-type: text/html;charset=GBK");//输出编码,避免中文乱码
?>
<html>
<head>
<title>ajax分页演示</title>
<script language="javascript" src="ajaxpg.js"></script>
<link rel="stylesheet" type="text/css" href="page.css">
</head>
<body>
<div id="result">
<?php
$page=isset($_GET['page'])?intval($_GET['page']):1; //这句就是获取page=18中的page的值，假如不存在page，那么页数就是1。
$num=3; //每页显示10条数据
$db=mysql_connect("localhost","root","123456"); //创建数据库连接
mysql_select_db("demo",$db) or die("数据库链接错误"); //选择要操作的数据库
mysql_query("set names gbk");
/*
首先咱们要获取数据库中到底有多少数据，才能判断具体要分多少页，具体的公式就是
总数据库除以每页显示的条数，有余进一。
也就是说10/3=3.3333=4 有余数就要进一。
*/
$result=mysql_query("select * from brand");
$total=mysql_num_rows($result); //查询所有的数据
$url='test.php';//设置ajax提交页面地址的URL，这里设置成test.php通过ajax把参数传递给test.php再把处理过的内容赋值到本页的div id=result。
//页码计算
$pagenum=ceil($total/$num);//获得总页数,也是最后一页
$page=min($pagenum,$page);//获得首页
$prepg=$page-1;//上一页
$nextpg=($page==$pagenum ? 0 : $page+1);//下一页
$offset=($page-1)*$num; //获取limit的第一个参数的值，假如第一页则为(1-1)*10=0,第二页为(2-1)*10=10。
$pagenav="<ul>";
//开始分页导航条代码：
$pagenav.="<li>显示第 <B>".($total?($offset+1):0)."</B>-<B>".min($offset+10,$total)."</B> 条记录</li><li>共 $total 条记录 </li>";
//如果只有一页则跳出函数：
if($pagenum<=1) return false;
$pagenav.="<li> <a href=javascript：dopage('result','$url?page=1');>首页</a></li> ";
if($prepg) $pagenav.="<li> <a href=javascript：dopage('result','$url?page=$prepg');>前页</a></li> "; else $pagenav.=" <li>前页</li> ";
if($nextpg) $pagenav.="<li><a href=javascript：dopage('result','$url?page=$nextpg');>后页</a> </li>"; else $pagenav.=" <li>后页</li> ";
$pagenav.="<li> <a href=javascript：dopage('result','$url?page=$pagenum');>尾页</a></li> ";
$pagenav.="<li>第 $page 页</li><li>共 $pagenum 页</li></ul>";
//假如传入的页数参数大于总页数，则显示错误信息
If($page>$pagenum){
Echo "Error : Can Not Found The page ".$page;
Exit; //开源软件:phpfensi.com
}
?></div><div id="results">
<?php
echo $pagenav;//输出分页导航
?>
</div>
</body>
</html> css code:
/* CSS Document */
/* CSS Document */
#result ul li{
height:20px;
width:auto;
display:block;
color:#999;
border:1px solid #999;
float:left;
list-style:none;
font-size:12px;
margin-left:5px;
line-height:20px;
vertical-align:middle;
text-align:center;
}
#result ul li a:link{
width:50px;
height:20px;
display:block;
line-height:20px;
background:#09C;
border:1px solid #fff;
color:#fff;
text-decoration:none;
}
#result ul li a:hover{
width:50px;
height:20px;
display:block;
line-height:20px;
background:#09C;
border:1px solid #fff;
color:#F60;
text-decoration:none;
} ajaxpg.js file, as follows:
// JavaScript Document
var http_request=false;
function send_request(url){//初始化，指定处理函数，发送请求的函数
http_request=false;
//开始初始化XMLHttpRequest对象
if(window.XMLHttpRequest){//Mozilla浏览器
http_request=new XMLHttpRequest();
if(http_request.overrideMimeType){//设置MIME类别
http_request.overrideMimeType("text/xml");
}
}
else if(window.ActiveXObject){//IE浏览器
try{
http_request=new ActiveXObject("Msxml2.XMLHttp");
}catch(e){
try{
http_request=new ActiveXobject("Microsoft.XMLHttp");
}catch(e){}
}
}
if(!http_request){//异常，创建对象实例失败
window.alert("创建XMLHttp对象失败！");
return false;
}
http_request.onreadystatechange=processrequest;
//确定发送请求方式，URL，及是否同步执行下段代码
http_request.open("GET",url,true);
http_request.send(null);
}
//处理返回信息的函数
function processrequest(){
if(http_request.readyState==4){//判断对象状态
if(http_request.status==200){//信息已成功返回，开始处理信息
document.getElementById("results").style.display="none";
document.getElementById(reobj).innerHTML=http_request.responseText;
}
else{//页面不正常
alert("您所请求的页面不正常！");
}
}
}
function dopage(obj,url){
document.getElementById(obj).innerHTML="<font color='green' font-size='12'>正在读取数据...</font>";
send_request(url);
reobj=obj;
}
Database file, as follows:
-- phpMyAdmin SQL Dump -- version 2.8.1 -- 主机: localhost -- 服务器版本: 5.0.22 -- PHP 版本: 5.2.12 -- -- 数据库: `demo` -- -- -------------------------------------------------------- -- -- 表的结构 `brand` -- CREATE TABLE `brand` ( `id` int(7) NOT NULL auto_increment, `sp_brand` varchar(255) default NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=19 ; -- -- 导出表中的数据 `brand` -- INSERT INTO `brand` (`id`, `sp_brand`) VALUES (1, 'hello world'), (2, '你好'), (3, '恩'), (4, 'fdsafdsafdsa'), (5, 'fdsafdafdsafdas'), (6, 'fdsafdsa'), (7, 'fdsafdsafdas'), (8, '恩'), (9, '恩'), (10, '恩'), (11, '恩11'), (12, '恩'), (13, '恩'), (14, '恩'), (15, '恩'), (16, '恩'), (17, '恩'), (18, '恩18');
The functions of these files are introduced below
ajaxpg.js:ajax does not refresh the core file, generally do not make modifications.
index.php:A file that implements ajax without refreshing. Here, the ajaxpg.js file is called, the mysql user password is configured, and it must be consistent with your local one, as well as display Pagination effect.
page.css:This is a paging CSS style file, used for beautification, so I won’t introduce it much.
brand.sql:This is the file of the MYSQL database. Import it into the MYSQL database. Similarly, if you cannot import it, you can refer to how to import it in PHPfensi.com. sql article is enough.
The example is very simple, you just need to follow the process and it will be ok. I hope this article can help you truly realize PHP ajax non-refresh paging.
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