PHP+MySql+jQuery实现的"顶"和"踩"投票功能_php技巧

本文实例为大家分享了基于PHP+jQuery+MySql实现红蓝(顶踩)投票代码，供大家参考，具体内容如下

数据库操作：

CREATE TABLE IF NOT EXISTS `votes` (
 `id` int(10) NOT NULL AUTO_INCREMENT,
 `likes` int(10) NOT NULL DEFAULT '0',
 `unlikes` int(10) NOT NULL DEFAULT '0',
 PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8; 

INSERT INTO `votes` (`id`, `likes`, `unlikes`) VALUES
(1, 30, 10); 

CREATE TABLE IF NOT EXISTS `votes_ip` (
 `id` int(10) NOT NULL,
 `vid` int(10) NOT NULL,
 `ip` varchar(40) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8;

div： 

<div class="digg">
 <div id="dig_up" class="digup">
 <span id="num_up"></span>
 <p>很好，很强大！</p>
 <div id="bar_up" class="bar"><span></span><i></i></div>
 </div>
 <div id="dig_down" class="digdown">
 <span id="num_down"></span>
 <p>太差劲了！</p>
 <div id="bar_down" class="bar"><span></span><i></i></div>
 </div>
 <div id="msg"></div>
</div> 

css：

.digg{width:420px; height:120px; margin:80px auto 20px auto; position:relative}
#dig_up,#dig_down{width:200px; height:48px; margin:10px; position:relative;
border:1px solid #d3d3d3; padding-left:42px; cursor:pointer}
.digup{background:url(diggs.png) no-repeat 4px 2px;}
.digup_on{background:url(diggs.png) no-repeat 4px -49px;}
.digdown{background:url(diggs.png) no-repeat 4px -102px;}
.digdown_on{background:url(diggs.png) no-repeat 4px -154px;}
#num_up,#num_down{position:absolute; right:6px; top:18px; font-size:20px;}
#dig_up p{height:24px; line-height:24px; color:#360}
#dig_down p{height:24px; line-height:24px; color:#f30}
.bar{width:100px; height:12px; line-height:12px; border:1px solid #f0f0f0;
position:relative; text-align:center}
.bar span{display:block; height:12px; }
.bar i{position:absolute; top:0; left:104px;}
#bar_up span{background:#360}
#bar_down span{background:#f60}
#msg{position:absolute; right:20px; top:40px; font-size:18px; color:#f00} 

jquery：

$(function(){
 //鼠标滑向和离开投票按钮时，变换背景样式
 $("#dig_up").hover(function(){
 $(this).addClass("digup_on");
 },function(){
 $(this).removeClass("digup_on");
 });
 $("#dig_down").hover(function(){
 $(this).addClass("digdown_on");
 },function(){
 $(this).removeClass("digdown_on");
 }); 

 //初始化数据
 getdata("do.php",1); 

 //单击“顶”时
 $("#dig_up").click(function(){
 getdata("do.php?action=like",1);
 });
 //单击“踩”时
 $("#dig_down").click(function(){
 getdata("do.php?action=unlike",1);
 });
}); 

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

php：

include_once("connect.php");//连接数据库 

$action = $_GET['action'];
$id = 1;
$ip = get_client_ip();//获取ip 

if($action=='like'){//顶
 likes(1,$id,$ip);
}elseif($action=='unlike'){//踩
 likes(0,$id,$ip);
}else{
 echo jsons($id);
} 

------------------------------------
function likes($type,$id,$ip){
 $ip_sql=mysql_query("select ip from votes_ip where vid='$id' and ip='$ip'");
 $count=mysql_num_rows($ip_sql);
 if($count==0){//还没有顶过
 if($type==1){//顶
  $sql = "update votes set likes=likes+1 where id=".$id;
 }else{//踩
  $sql = "update votes set unlikes=unlikes+1 where id=".$id;
 }
 mysql_query($sql); 

 $sql_in = "insert into votes_ip (vid,ip) values ('$id','$ip')";
 mysql_query($sql_in); 

 if(mysql_insert_id()>0){
  echo jsons($id);
 }else{
  $arr['success'] = 0;
  $arr['msg'] = '操作失败，请重试';
  echo json_encode($arr);
 }
 }else{
 $msg = $type==1?'您已经顶过了':'您已经踩过了';
 $arr['success'] = 0;
 $arr['msg'] = $msg;
 echo json_encode($arr);
 }
} 

-----------php-------------------------

function jsons($id){
 $query = mysql_query("select * from votes where id=".$id);
 $row = mysql_fetch_array($query);
 $like = $row['likes'];
 $unlike = $row['unlikes'];
 $arr['success']=1;
 $arr['like'] = $like;
 $arr['unlike'] = $unlike;
 $like_percent = round($like/($like+$unlike),3)*100;
 $arr['like_percent'] = $like_percent.'%';
 $arr['unlike_percent'] = (100-$like_percent).'%'; 

 return json_encode($arr);
}

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