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php+ajax实现无刷新的新闻留言系统_php技巧

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May 16, 2016 pm 08:05 PM

php

本文介绍了一款无刷新的新闻留言系统，最简明易懂的一个ajax无刷新留言系统，源码中省略了接受数据验证的过程，大家可根据自己的需求进行扩展，下面进入主题。

核心源码：

1.配置文件:config.php,代码如下：

<&#63;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"); 
&#63;>

2.处理请求:deal.php,代码如下：

<&#63;php 
 header("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"}'; 
 } 
&#63;>

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"> 
<&#63;php 
 include "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>"; 
 } 
&#63;> 
</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。

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