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:
1
|
2
3
4
5
6
7
8
9
10
11
|
<?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:
1
|
2
3
4
5
6
7
8
9
10
11
12
|
<?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"}' ; } ?> |
3.首页代码:index.php,代码如下:
1
|
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
<!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" > <? 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 >"; } ?> </ div > </ body > </ html > |
数据库文件,代码如下:
1
|
2
3
4
5
6
7
|
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。