這篇文章主要介紹了PHP jQuery實現滾屏無刷新動態加載數據功能,涉及php動態讀取數據庫及加載數據實現滾屏無刷新效果的具體操作技巧,需要的朋友可以參考下
具體如下：
index.php
<?php
require_once('connect.php'); //连接数据库
$user = array('demo1','demo2','demo3','demo3','<de></de>mo4'); //模拟了几个用户
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<title>滚屏加载--无刷新动态加载数据技术的应用</title>
<style type="text/css">
#container{margin:10px auto;width: 660px; border: 1px solid #999;}
.single_item{padding: 20px; border-bottom: 1px dotted #d3d3d3;}
.author{position: absolute; left: 0px; font-weight:bold; color:#39f}
.date{position: absolute; right: 0px; color:#999}
.content{line-height:20px; word-break: break-all;}
.element_head{width: 100%; position: relative; height: 20px;}
.nodata{display:none; height:32px; line-height:32px; text-align:center; color:#999; font-size:14px}
</style>
<script type="text/javascript" src="jquery-1.8.3.min.js"></script> //需要引入jquery
</head>
<body>
<p class="one" style="margin:20px">提示：使用滚动或拉动滚动条向下看。</p>
<p id="container">
<?php
$query=mysqli_query($link, "select * from say order by id desc limit 0,15");
while ($row=mysqli_fetch_array($query, MYSQLI_ASSOC)) {
?>
<p class="single_item">
<p class="element_head">
<p class="date"><?php echo date('m-d H:i',$row['addtime']);?></p>
<p class="author"><?php echo $user[$row['userid']];?></p>
</p>
<p class="content"><?php echo $row['content'];?></p>
</p>
<?php } ?>
</p>
<p class="nodata"></p>
</body>
<script type="text/javascript">
$(function(){
var winH = $(window).height(); //页面可视区域高度
var i = 1;//设置当前页数
$(window).scroll(function () {
var pageH = $(document.body).height();
var scrollT = $(window).scrollTop(); //滚动条top
var aa = (pageH-winH-scrollT)/winH;
if(aa<0.02){
$.getJSON("result.php",{page:i},function(json){
if(json){
var str = "";
$.each(json,function(index,array){
var str = "<p class=\"single_item\"><p class=\"element_head\">";
var str = str + "<p class=\"date\">"+array['date']+"</p>";
var str = str + "<p class=\"author\">"+array['author']+"</p>";
var str = str + "</p><p class=\"content\">"+array['content']+"</p></p>";
$("#container").append(str);
});
i++;
}else{
$(".nodata").show().html("别滚动了，已经到底了。。。");
return false;
}
});
}
});
});
</script>
</html>#ajax_demo.sql
##
-- phpMyAdmin SQL Dump -- version 3.5.2.2 -- http://www.phpmyadmin.net -- -- 主机: localhost -- 生成日期: 2015 年 01 月 18 日 15:56 -- 服务器版本: 5.1.46-community -- PHP 版本: 5.2.13 SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO"; SET time_zone = "+00:00"; /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */; /*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */; /*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */; /*!40101 SET NAMES utf8 */; -- -- 数据库: `demo` -- -- -------------------------------------------------------- -- -- 表的结构 `say` -- CREATE TABLE IF NOT EXISTS `say` ( `id` int(11) NOT NULL AUTO_INCREMENT, `userid` int(11) NOT NULL DEFAULT '0', `content` varchar(200) NOT NULL, `addtime` int(10) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=63 ; -- -- 转存表中的数据 `say` -- INSERT INTO `say` (`id`, `userid`, `content`, `addtime`) VALUES (1, 0, '爱爱爱', 1421332482), (2, 1, '爱爱爱', 1421332482), (3, 0, '爱爱爱', 1421332482), (4, 1, '爱爱爱', 1421332482), (5, 0, '爱爱爱', 1421332482), (6, 0, '爱爱爱', 1421332482), (7, 0, '爱爱爱', 1421332482), (8, 2, '爱爱爱', 1421332482), (9, 0, '爱爱爱', 1421332482), (10, 0, '爱爱爱', 1421332482), (11, 0, '爱爱爱', 1421332482), (12, 0, '爱爱爱', 1421332482), (13, 0, '爱爱爱', 1421332482), (14, 0, '爱爱爱', 1421332482), (15, 0, '爱爱爱', 1421332482), (16, 0, '爱爱爱', 1421332482), (17, 0, '爱爱爱', 1421332482), (18, 0, '爱爱爱', 1421332482), (19, 0, '爱爱爱', 1421332482), (20, 0, '爱爱爱', 1421332482), (21, 0, '爱爱爱', 1421332482), (22, 0, '爱爱爱', 1421332482), (23, 0, '爱爱爱', 1421332482), (24, 0, '爱爱爱', 1421332482), (25, 0, '爱爱爱', 1421332482), (26, 0, '2222', 1421333156), (27, 0, '2222', 1421333159), (28, 0, '2222', 1421333161), (29, 0, '2222', 1421333162), (30, 0, '2222', 1421333164), (31, 0, '2222', 1421333165), (32, 0, '2222', 1421333167), (33, 0, '2222', 1421333168), (34, 0, '2222', 1421333169), (35, 0, '2222', 1421333170), (36, 0, '2222', 1421333172), (37, 0, '2222', 1421333173), (38, 0, '2222', 1421333175), (39, 0, '2222', 1421333176), (40, 0, '2222', 1421333177), (41, 0, '2222', 1421333178), (42, 0, '2222', 1421333179), (43, 0, '2222', 1421333181), (44, 0, '2222', 1421333182), (45, 0, '2222', 1421333183), (46, 0, '2222', 1421333184), (47, 0, '2222', 1421333293), (48, 0, '2222', 1421333295), (49, 0, '2222', 1421333296), (50, 0, '2222', 1421333297), (51, 0, '2222', 1421333298), (52, 0, '2222', 1421333299), (53, 0, '2222', 1421333300), (54, 0, '2222', 1421333302), (55, 0, '2222', 1421333303), (56, 0, '2222', 1421333304), (57, 0, '2222', 1421333305), (58, 0, '2222', 1421333306), (59, 0, '2222', 1421333308), (60, 0, '2222', 1421333309), (61, 0, '2222', 1421333310), (62, 0, '2222', 1421333311); /*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */; /*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */; /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
#result.php 接收請求頁面
<?php
require_once('connect.php'); //连接数据库
$user = array('demo1','demo2','demo3','demo3','demo4');
$page = intval($_GET['page']); //获取请求的页数
$start = $page*15;
$query=mysqli_query($link, "select * from say order by id desc limit $start,15");
/* while ($row=mysqli_fetch_array($query)) {
$arr[] = array(
'content'=>$row['content'],
'author'=>$user[$row['userid']],
'date'=>date('m-d H:i',$row['addtime'])
);
} */
if($query){
while ($row=mysqli_fetch_array($query)) {
$arr[] = array(
'content'=>$row['content'],
'author'=>$user[$row['userid']],
'date'=>date('m-d H:i',$row['addtime'])
);
}
}
if(!empty($arr)){
echo json_encode($arr); //转换为json数据输出
}
//echo json_encode($arr); //转换为json数据输出
?><?php
$host="localhost";
$db_user="root";
$db_pass="admin";
$db_name="ajax_demo";
$timezone="Asia/Shanghai";
$link=mysqli_connect($host,$db_user,$db_pass);
mysqli_select_db($link, $db_name);
mysqli_query($link, "SET names UTF8");
header("Content-Type: text/html; charset=utf-8");
?>相關推薦：
#PHP 隨機數C擴充隨機數
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