PHP+jQuery method to implement the function of dynamically loading data without refreshing on the scroll screen-PHP Tutorial-php.cn

Home

Backend Development

PHP Tutorial

PHP+jQuery method to implement the function of dynamically loading data without refreshing on the scroll screen

墨辰丷

May 23, 2018 am 09:39 AM

phpdynamic

This article mainly introduces the function of PHP jQuery to dynamically load data in scrolling without refreshing, and involves the specific operation skills of dynamically reading the database and loading data in PHP to achieve scrolling without refreshing. Friends in need can refer to it

The details are as follows:

index.php

<?php
require_once(&#39;connect.php&#39;); //连接数据库
$user = array(&#39;demo1&#39;,&#39;demo2&#39;,&#39;demo3&#39;,&#39;demo3&#39;,&#39;<de></de>mo4&#39;); //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(&#39;m-d H:i&#39;,$row[&#39;addtime&#39;]);?></p>
         <p class="author"><?php echo $user[$row[&#39;userid&#39;]];?></p>
       </p>
       <p class="content"><?php echo $row[&#39;content&#39;];?></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[&#39;date&#39;]+"</p>";
            var str = str + "<p class=\"author\">"+array[&#39;author&#39;]+"</p>";
            var str = str + "</p><p class=\"content\">"+array[&#39;content&#39;]+"</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 &#39;0&#39;,
 `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, &#39;爱爱爱&#39;, 1421332482),
(2, 1, &#39;爱爱爱&#39;, 1421332482),
(3, 0, &#39;爱爱爱&#39;, 1421332482),
(4, 1, &#39;爱爱爱&#39;, 1421332482),
(5, 0, &#39;爱爱爱&#39;, 1421332482),
(6, 0, &#39;爱爱爱&#39;, 1421332482),
(7, 0, &#39;爱爱爱&#39;, 1421332482),
(8, 2, &#39;爱爱爱&#39;, 1421332482),
(9, 0, &#39;爱爱爱&#39;, 1421332482),
(10, 0, &#39;爱爱爱&#39;, 1421332482),
(11, 0, &#39;爱爱爱&#39;, 1421332482),
(12, 0, &#39;爱爱爱&#39;, 1421332482),
(13, 0, &#39;爱爱爱&#39;, 1421332482),
(14, 0, &#39;爱爱爱&#39;, 1421332482),
(15, 0, &#39;爱爱爱&#39;, 1421332482),
(16, 0, &#39;爱爱爱&#39;, 1421332482),
(17, 0, &#39;爱爱爱&#39;, 1421332482),
(18, 0, &#39;爱爱爱&#39;, 1421332482),
(19, 0, &#39;爱爱爱&#39;, 1421332482),
(20, 0, &#39;爱爱爱&#39;, 1421332482),
(21, 0, &#39;爱爱爱&#39;, 1421332482),
(22, 0, &#39;爱爱爱&#39;, 1421332482),
(23, 0, &#39;爱爱爱&#39;, 1421332482),
(24, 0, &#39;爱爱爱&#39;, 1421332482),
(25, 0, &#39;爱爱爱&#39;, 1421332482),
(26, 0, &#39;2222&#39;, 1421333156),
(27, 0, &#39;2222&#39;, 1421333159),
(28, 0, &#39;2222&#39;, 1421333161),
(29, 0, &#39;2222&#39;, 1421333162),
(30, 0, &#39;2222&#39;, 1421333164),
(31, 0, &#39;2222&#39;, 1421333165),
(32, 0, &#39;2222&#39;, 1421333167),
(33, 0, &#39;2222&#39;, 1421333168),
(34, 0, &#39;2222&#39;, 1421333169),
(35, 0, &#39;2222&#39;, 1421333170),
(36, 0, &#39;2222&#39;, 1421333172),
(37, 0, &#39;2222&#39;, 1421333173),
(38, 0, &#39;2222&#39;, 1421333175),
(39, 0, &#39;2222&#39;, 1421333176),
(40, 0, &#39;2222&#39;, 1421333177),
(41, 0, &#39;2222&#39;, 1421333178),
(42, 0, &#39;2222&#39;, 1421333179),
(43, 0, &#39;2222&#39;, 1421333181),
(44, 0, &#39;2222&#39;, 1421333182),
(45, 0, &#39;2222&#39;, 1421333183),
(46, 0, &#39;2222&#39;, 1421333184),
(47, 0, &#39;2222&#39;, 1421333293),
(48, 0, &#39;2222&#39;, 1421333295),
(49, 0, &#39;2222&#39;, 1421333296),
(50, 0, &#39;2222&#39;, 1421333297),
(51, 0, &#39;2222&#39;, 1421333298),
(52, 0, &#39;2222&#39;, 1421333299),
(53, 0, &#39;2222&#39;, 1421333300),
(54, 0, &#39;2222&#39;, 1421333302),
(55, 0, &#39;2222&#39;, 1421333303),
(56, 0, &#39;2222&#39;, 1421333304),
(57, 0, &#39;2222&#39;, 1421333305),
(58, 0, &#39;2222&#39;, 1421333306),
(59, 0, &#39;2222&#39;, 1421333308),
(60, 0, &#39;2222&#39;, 1421333309),
(61, 0, &#39;2222&#39;, 1421333310),
(62, 0, &#39;2222&#39;, 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 Receive request page

<?php
require_once(&#39;connect.php&#39;); //连接数据库
$user = array(&#39;demo1&#39;,&#39;demo2&#39;,&#39;demo3&#39;,&#39;demo3&#39;,&#39;demo4&#39;);
$page = intval($_GET[&#39;page&#39;]); //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)) {
  $arr[] = array(
    &#39;content&#39;=>$row[&#39;content&#39;],
    &#39;author&#39;=>$user[$row[&#39;userid&#39;]],
    &#39;date&#39;=>date(&#39;m-d H:i&#39;,$row[&#39;addtime&#39;])
  );
} */
if($query){
  while ($row=mysqli_fetch_array($query)) {
    $arr[] = array(
      &#39;content&#39;=>$row[&#39;content&#39;],
      &#39;author&#39;=>$user[$row[&#39;userid&#39;]],
      &#39;date&#39;=>date(&#39;m-d H:i&#39;,$row[&#39;addtime&#39;])
    );
  }
}
if(!empty($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
?>

connect.php Database configuration file

<?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");
?>

PHPArray function knowledge summary_php skills

PHPObject-oriented const constant modifier

##PHP Random number C extended random number

The above is the detailed content of PHP+jQuery method to implement the function of dynamically loading data without refreshing on the scroll screen. For more information, please follow other related articles on the PHP Chinese website!

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

PHP Performance Tuning for High Traffic WebsitesMay 14, 2025 am 12:13 AM

ThesecrettokeepingaPHP-poweredwebsiterunningsmoothlyunderheavyloadinvolvesseveralkeystrategies:1)ImplementopcodecachingwithOPcachetoreducescriptexecutiontime,2)UsedatabasequerycachingwithRedistolessendatabaseload,3)LeverageCDNslikeCloudflareforservin

Dependency Injection in PHP: Code Examples for BeginnersMay 14, 2025 am 12:08 AM

You should care about DependencyInjection(DI) because it makes your code clearer and easier to maintain. 1) DI makes it more modular by decoupling classes, 2) improves the convenience of testing and code flexibility, 3) Use DI containers to manage complex dependencies, but pay attention to performance impact and circular dependencies, 4) The best practice is to rely on abstract interfaces to achieve loose coupling.

PHP Performance: is it possible to optimize the application?May 14, 2025 am 12:04 AM

Yes,optimizingaPHPapplicationispossibleandessential.1)ImplementcachingusingAPCutoreducedatabaseload.2)Optimizedatabaseswithindexing,efficientqueries,andconnectionpooling.3)Enhancecodewithbuilt-infunctions,avoidingglobalvariables,andusingopcodecaching

PHP Performance Optimization: The Ultimate GuideMay 14, 2025 am 12:02 AM

ThekeystrategiestosignificantlyboostPHPapplicationperformanceare:1)UseopcodecachinglikeOPcachetoreduceexecutiontime,2)Optimizedatabaseinteractionswithpreparedstatementsandproperindexing,3)ConfigurewebserverslikeNginxwithPHP-FPMforbetterperformance,4)

PHP Dependency Injection Container: A Quick StartMay 13, 2025 am 12:11 AM

APHPDependencyInjectionContainerisatoolthatmanagesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itactsasacentralhubforcreatingandinjectingdependencies,thusreducingtightcouplingandeasingunittesting.

Dependency Injection vs. Service Locator in PHPMay 13, 2025 am 12:10 AM

Select DependencyInjection (DI) for large applications, ServiceLocator is suitable for small projects or prototypes. 1) DI improves the testability and modularity of the code through constructor injection. 2) ServiceLocator obtains services through center registration, which is convenient but may lead to an increase in code coupling.

PHP performance optimization strategies.May 13, 2025 am 12:06 AM

PHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi

PHP Email Validation: Ensuring Emails Are Sent CorrectlyMay 13, 2025 am 12:06 AM

PHPemailvalidationinvolvesthreesteps:1)Formatvalidationusingregularexpressionstochecktheemailformat;2)DNSvalidationtoensurethedomainhasavalidMXrecord;3)SMTPvalidation,themostthoroughmethod,whichchecksifthemailboxexistsbyconnectingtotheSMTPserver.Impl

See all articles

Hot AI Tools

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress images for free

Clothoff.io

AI clothes remover

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

How to fix KB5055612 fails to install in Windows 10?

4 weeks agoByDDD

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys

4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Roblox: Grow A Garden - Complete Mutation Guide

3 weeks agoByDDD

Nordhold: Fusion System, Explained

4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Mandragora: Whispers Of The Witch Tree - How To Unlock The Grappling Hook

3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

SublimeText3 English version

Recommended: Win version, supports code prompts!

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.