
核心源码:
1.配置文件:config.php,代码如下:
<?php//数据库配置信息(用户名,密码,数据库名,表前缀等)$cfg_dbhost = "localhost";$cfg_dbuser = "root";$cfg_dbpwd = "root";$cfg_dbname = "ajaxdemo1";$cfg_dbprefix = "";$link = mysql_connect($cfg_dbhost,$cfg_dbuser,$cfg_dbpwd);mysql_select_db($cfg_dbname);mysql_query("set names utf8"); ?>2.处理请求:deal.php,代码如下:
<?phpheader("Content-type:text/html;charset=utf-8");include "config.php";//post接收数据,只是演示效果,这里就省去验证了$name = $_POST["name"];$content = $_POST["content"];$sql = "insert into test (name,content) values ("{$name}","{$content}");";$res = mysql_query($sql,$link);if($res){echo "{"name": "".$name."","content": "".$content."","status": "1"}";} ?> 3.首页代码:index.php,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" /> <title>无刷新</title> <link href="css/css.css" type="text/css" rel="stylesheet" /> <style type="text/css"> body{color:#555;font-size:14px;padding:0;margin:0;} #form { background:#dedede; padding:10px 20px; width:300px;} #show{ background:#f6f6f6;padding:10px 20px; width:300px;} #show p{ margin:6px; font-size:13px; line-height:22px; border-bottom:1px dashed #cdcdcd;} </style> <script type="text/javascript" src="jquery-1.7.2.min.js"></script> <script type="text/javascript"> $(function(){$("#sub").click(function(){//只是说明原理,然后这里省去了验证文本框内容的步骤,直接发送ajax请求$.post("deal.php",{name : $("#name").val(), content : $("#content").val()}, function(data){ if(data.status){var str = "<p><strong>"+data.name+"</strong> 发表了:"+data.content+"</p>";$("#show").prepend(str); //在前面追加 }else{alert("评论失败"); } }, "json");}); }); </script> </head> <body> <div id="form"><form action="deal.php" method="get" id="suggest_form">用户名:<input type="text" name="name" id="name" /><br/>内 容:<textarea name="content" id="content"></textarea> <input type="button" value="发布" id="sub" /></form> </div> <div id="show"> <?phpinclude "config.php";$sql = "select * from test;";$res = mysql_query($sql,$link);while($row=mysql_fetch_array($res)){echo "<p><strong>".$row["name"]."</strong> 发表了:".$row["content"]."</p>";} ?> </div> </body> </html> 数据库文件,代码如下:DROP TABLE IF EXISTS `test`; CREATE TABLE `test` (`id` int(10) unsigned NOT NULL AUTO_INCREMENT,`name` varchar(64) NOT NULL,`content` text NOT NULL,PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;以上就是为大家分享的php+ajax实现无刷新的新闻留言系统,希望对大家的学习有所帮助。