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php+ajax制作无刷新留言板

Jun 06, 2016 pm 07:39 PM
php

这篇文章主要介绍了一款基于php+ajax实现无刷新留言板实例,需要的朋友可以参考下

本文就是和大家分享一款由php结合ajax实现的无刷新留言板,先给大家看一下最后的效果图:

php+ajax制作无刷新留言板

数据库连接代码如下:

index.php文件代码如下:

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无刷新显示回帖

[]
Copy after login
回帖
姓名:
标题:
内容:

bbspost.php文件代码如下

bbs.js文件里面包括了大量ajax文件,代码如下

//先创建一个空的bbs.js文件,,并修改其属性为utf-8,才能保存中文。 var xmlHttp; //用于保存XMLHttpRequest对象的全局变量 var username; //用于保存姓名 var title; //用于保存标题 var content; //用于保存内容 var threadid; //用于保存主题编号 //用于创建XMLHttpRequest对象 function createXmlHttp() { //根据window.XMLHttpRequest对象是否存在使用不同的创建方式 if (window.XMLHttpRequest) { xmlHttp = new XMLHttpRequest(); //FireFox、Opera等浏览器支持的创建方式 } else { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");//IE浏览器支持的创建方式 } } //提交回帖到服务器 function submitPost() { //获取帖子中姓名、标题、内容、主题编号四部分信息 username = document.getElementById("username").value; title = document.getElementById("post_title").value; content = document.getElementById("post_content").value; threadid = document.getElementById("threadid").value; if (checkForm()) { createXmlHttp(); //创建XMLHttpRequest对象 xmlHttp.onreadystatechange = submitPostCallBack; //设置回调函数 xmlHttp.open("POST", "bbspost.php", true); //发送POST请求 //设置POST请求体类型 xmlHttp.setRequestHeader("Content-type","application/x-www-form-urlencoded"); xmlHttp.send("username=" + encodeURI(username) + "&title=" + encodeURI(title) + "&content=" + encodeURI(content) + "&threadid=" + threadid); //发送包含四个参数的请求体 } } //检查表单是否内容已填写完毕 function checkForm() { if (username == "") { alert("请填写姓名"); return false; } else if (title == "") { alert("请填写标题"); return false; } else if (content == "") { alert("请填写内容"); return false; } return true; } //获取查询选项的回调函数 function submitPostCallBack() { if (xmlHttp.readyState == 4) { alert(xmlHttp.responseText); createNewPost(xmlHttp.responseText); } } //创建新的回帖 function createNewPost(postId) { //清空当前表单中各部分信息 document.getElementById("post_title").value = ""; document.getElementById("post_content").value = ""; document.getElementById("username").value = ""; var postDiv = createDiv("post", ""); //创建回帖的外层div postDiv.id = "post" + postId; //给新div赋id值 var postTitleDiv = createDiv("post_title", title + " [" + username + "]"); //创建标题div var postContentDiv = createDiv("post_content", "

" + content + "
Copy after login
"); //创建内容div postDiv.appendChild(postTitleDiv); //在外层div追加标题 postDiv.appendChild(postContentDiv); //在外层div追加内容 document.getElementById("thread").appendChild(postDiv); //将外层div追加到主题div中 } //根据className和text创建新的div function createDiv(className, text) { var newDiv = document.createElement("div"); newDiv.className = className; newDiv.innerHTML = text; return newDiv; }

bbs.css文件如下:

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