PHP+Mysql实现网站顶和踩投票功能实例

 1 <div class="digg">  
 2     <div id="dig_up" class="digup"> 
 3         <span id="num_up"></span> 
 4         <p>很好，很强大！</p> 
 5         <div id="bar_up" class="bar"><span></span><i></i></div> 
 6     </div> 
 7        <div id="dig_down" class="digdown"> 
 8         <span id="num_down"></span> 
 9         <p>太差劲了！</p> 
10         <div id="bar_down" class="bar"><span></span><i></i></div> 
11     </div> 
12     <div id="msg"></div> 
13 </div>
14 
15 $(function(){ 
16     //当鼠标悬浮和离开两个按钮时，切换按钮背景样式 
17     $("#dig_up").hover(function(){ 
18         $(this).addClass("digup_on"); 
19     },function(){ 
20         $(this).removeClass("digup_on"); 
21     }); 
22     $("#dig_down").hover(function(){ 
23         $(this).addClass("digdown_on"); 
24     },function(){ 
25         $(this).removeClass("digdown_on"); 
26     }); 
27      
28     //初始化数据 
29     getdata("ajax.php",1); 
30      
31     //单击“顶”时 
32     $("#dig_up").click(function(){ 
33         getdata("ajax.php?action=like",1); 
34     }); 
35     //单击“踩”时 
36     $("#dig_down").click(function(){ 
37         getdata("ajax.php?action=unlike",1); 
38     }); 
39 });

 1 function getdata(url,sid){ 
 2     $.getJSON(url,{id:sid},function(data){ 
 3         if(data.success==1){//投票成功 
 4             $("#num_up").html(data.like); 
 5             //通过控制宽度来显示百分比进度条效果 
 6             $("#bar_up span").css("width",data.like_percent); 
 7             $("#bar_up i").html(data.like_percent); 
 8             $("#num_down").html(data.unlike); 
 9             $("#bar_down span").css("width",data.unlike_percent); 
10             $("#bar_down i").html(data.unlike_percent); 
11         }else{//投票失败 
12             $("#msg").html(data.msg).show().css({‘opacity‘:1,‘top‘:‘40px‘}) 
13             .animate({top:‘-50px‘,opacity:0}, "slow"); 
14         } 
15     }); 
16 }

 1 $action = $_GET[‘action‘]; 
 2 $id = 1; 
 3 $ip = get_client_ip();//获取当前ip 
 4  
 5 if ($action == ‘like‘) { 
 6     likes(1, $id, $ip); 
 7 } elseif ($action == ‘unlike‘) { 
 8     likes(0, $id, $ip); 
 9 } else { 
10     echo jsons($id); 
11 }

 1 CREATE TABLE IF NOT EXISTS `votes` ( 
 2   `id` int(10) NOT NULL AUTO_INCREMENT, 
 3   `likes` int(10) NOT NULL DEFAULT ‘0‘, 
 4   `unlikes` int(10) NOT NULL DEFAULT ‘0‘, 
 5   PRIMARY KEY (`id`) 
 6 ) ENGINE=MyISAM  DEFAULT CHARSET=utf8; 
 7  
 8  
 9 INSERT INTO `votes` (`id`, `likes`, `unlikes`) VALUES 
10 (1, 30, 10); 
11  
12 CREATE TABLE IF NOT EXISTS `votes_ip` ( 
13   `id` int(11) NOT NULL AUTO_INCREMENT, 
14   `vid` int(11) NOT NULL, 
15   `ip` varchar(20) NOT NULL, 
16   PRIMARY KEY (`id`) 
17 ) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=3 ;