Wordpress实现文章支持和反对功能的方法

public function dolike_unlike(){ 
$b = M(); 
$input = new input(); 
$id = $input->post('id');//过滤提交的信息。防止sql注入，之前发的代码我都补上了。 
//$id = 5524; 
$val = $_POST['data']; 
if($val==1){ 
$b->query("update `wp_posts` set `like` =`like`+1 WHERE id = $id");//点击like的更新 
}else if($val==0){ 
$b->query("update `wp_posts` set `unlike` =`unlike`+1 WHERE id = $id"); //dislike更新 
}else{ 
$this->error('error'); 
} 
$list = $b->query("SELECT `like`,`unlike` FROM `wp_posts` WHERE id = $id");//获取数据 
$like = $list[0]['like']; 
$dislike = $list[0]['unlike']; 
if($like!=0 || $dislike!=0){//计算 
$elike = $like/($like+$dislike); 
$elike = substr($elike*100,0,4); 
$edislike = $dislike/($like+$dislike); 
$edislike = substr($edislike*100,0,4); 
} 
//echo $elike; 
$output = array(//组合函数待输出 
likenum=>$like, 
dislikenum=>$dislike, 
like=>$elike, 
dislike=>$edislike 
); 
//echo $list; 
//dump($output); 
$this->ajaxReturn($output,'success',1);//输出 
//echo 'ok'; 
//$this->display(''); 
}

<div class="cl"></div> 
<style> 
.recomm{ border-bottom:4px solid #FF7523; color:#FF7523} 
.single_share_class{ position:absolute; left:-95px; top:80px; width:75px; height:328px; text-align:center; background:url(/img/single_page_share.png) no-repeat;} 
.single_share_class .comm_num{ padding:12px 0 48px 0px} 
.single_share_class .comm_num span{ font-size:10px; line-height:11px; color:#ff9853; display:block} 
.single_share_class >span >span >span{ margin-bottom:7px !important;} 
.single_share_class .copylink{ padding:28px 0 0 0; cursor:pointer} 
.single_share_class .st_sharethis_large >span >span{ background:none !important} 
.dingandcai{ width:526px; height:62px; background:url(/img/likeandunlike.jpg) no-repeat; margin:20px 0;line-height:62px; text-align:center; font-size:24px; text-shadow:1px 1px 1px #000; } 
.dingandcai .left_like{ width:224px; float:left;height:62px; position:relative} 
.dingandcai .left_like span,.dingandcai .right_unlike span{ position:relative; z-index:2} 
.dingandcai .dingload{ width:78px; float:left; } 
.dingandcai .right_unlike{ width:224px; float:left; height:62px;position:relative } 
.dingandcai .left_like .left_con{ background:url(/img/likeandunlike.jpg) 0px -63px no-repeat; width:50%; height:62px;position:absolute;top:0;left:0; z-index:1} 
.dingandcai .right_unlike .right_con{ background:url(/img/likeandunlike.jpg) -302px -63px no-repeat; width:50%; height:62px;position:absolute;top:0;left:0; z-index:1} 
.allow_click,.disallow_click{cursor:pointer} 
</style> 
<div class="dingandcai"> 
<div class="left_like" val="1" postid="<?php the_ID(); ?>"> 
<div class="left_con"></div><span id="like">Like</span> 
</div> 
<div class="dingload"> 
<img src="/img/loading_sm.gif" />&nbsp; 
</div> 
<div class="right_unlike" val="0" postid="<?php the_ID(); ?>"> 
<div class="right_con"></div> 
<span id="dislike">Dislike</span> 
</div> 
</div> 
<div class="cl"></div>

jQuery(".dingload img").ajaxStart(function(){//ajax提示 
jQuery(this).show(); 
}); 
jQuery(".dingload img").ajaxStop(function(){ 
jQuery(this).hide(); 
}); 
var pid = jQuery(".left_like").attr("postid"); 
var likecookie = jQuery.cookie("like"+pid); 
if(likecookie!=pid){//判断是否点击过，如果没有点击则 
jQuery(".left_like,.right_unlike").addClass("allow_click"); 
jQuery.get('/cityosweb/default.php/Shanmao/wplike_unlike',{id:pid},function(data){ 
if(data.status==1){//显示背景百分比和like dislike字样 
jQuery(".left_like .left_con").css("width",data.data.like+"%"); 
jQuery(".right_unlike .right_con").css("width",data.data.dislike+"%"); 
} 
},"json"); 
}else{//如果已经投过票了则 
jQuery(".left_like,.right_unlike").addClass("disallow_click"); 
jQuery.get('/cityosweb/default.php/Shanmao/wplike_unlike',{id:pid},function(data){ 
if(data.status==1){//显示背景百分比和投票数 
//alert(data.likenum); 
jQuery("#like").html(data.data.likenum); 
jQuery("#dislike").html(data.data.dislikenum); 
jQuery(".left_like .left_con").css("width",data.data.like+"%"); 
jQuery(".right_unlike .right_con").css("width",data.data.dislike+"%"); 
} 
},"json"); 
} 
jQuery(".left_like,.right_unlike").click(function(){ 
if(jQuery(this).hasClass("allow_click")){//如果有这个class才提交 
var val = jQuery(this).attr("val"); 
var postid = jQuery(this).attr("postid"); 
jQuery.post('/cityosweb/default.php/Shanmao/dolike_unlike',{data:val,id:postid},function(data){//点击的时候 
if(data.status==1){//成功返回处理 
jQuery("#like").html(data.data.likenum); 
jQuery("#dislike").html(data.data.dislikenum); 
jQuery(".left_like .left_con").css("width",data.data.like+"%"); 
jQuery(".right_unlike .right_con").css("width",data.data.dislike+"%"); 
jQuery(".left_like,.right_unlike").removeClass("allow_click").addClass("disallow_click"); 
jQuery.cookie('like'+postid,postid,{expires: 1});//提交后写入cookie，这里是用juqery.cookie插件。保存一天时间，每篇文章保存不一样的id。值随意，只要你上面好做判断。 
}else{ 
alert(data.info); 
} 
},"json"); 
} 
}); 
jQuery(".disallow_click").live("click",function(){//不允许提交时候弹出 
alert("Your vote has already been submitted!"); 
});