PHP+MySql+jQuery实现的"顶"和"踩"投票功能

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); 
    } 

以上就是本文的全部内容，希望对大家学习php程序设计有所帮助。