数据库连接代码如下:
<?php $conn = @mysql_connect("localhost","root","root") or die ("MySql连接错误"); mysql_select_db("demo",$conn); mysql_query("set names 'utf8'"); ?>
index.php文件代码如下:
<!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"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <link href="https://www.jb51.net/bbs.css" type="text/css"> <title>无刷新显示回帖</title> <script src="https://www.jb51.net/article/bbs.js" type="text/javascript"></script> </head> <body> <h1>无刷新显示回帖</h1> <div> <?php include("conn.php"); $sql = "select * from `bbs_post` where `threadid` ='1' order by id asc"; $query =mysql_query($sql); while($row = mysql_fetch_array($query)){ ?> <div> <div><?php echo $row['title'];?> [<?php echo $row['username'];?>]</div> <div><pre><?php echo $row['content'];?></pre></div> </div> <?php } ?> </div> <table> <tr> <td colspan="2">回帖<input type="hidden" value="1"></td> </tr> <tr> <td>姓名:</td> <td><input type="text"></td> </tr> <tr> <td>标题:</td> <td><input type="text"></td> </tr> <tr> <td>内容:</td> <td><textarea></textarea></td> </tr> <tr> <td colspan="2"><input type="button" value="提交"></td> </tr> </table> </body> </html>
bbspost.php文件代码如下
<?php include("conn.php"); $title = $_POST["title"]; //获取title $content = $_POST["content"]; //获取content $username = $_POST["username"]; //获取username $threadId = $_POST["threadid"]; //获取threadid $sql="insert into bbs_post (title,content,username,threadid) " . "values ('$title','$content','$username','$threadId')"; mysql_query($sql); //传回最后一次使用 INSERT 指令的 ID $responseId=mysql_insert_id(); echo $responseId; ?>
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", "<pre>" + content + "</pre>"); //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: