本文实例讲述了jQuery+ajax实现文章点赞功能的方法。分享给大家供大家参考，具体如下：
前几日有童鞋问我索要本站右上角的点赞功能，麦葱左思右想，决定把这功能分享出来,希望此功能对各位会带来方便哦。
代码很简单，jQuery+php实现的。
jQuery代码：
jQuery(document).ready(function($) {$(".zan").click(function(e){var $i=$(".zan i"), $b=$("<b>").text("+1"), n=parseInt($i.text());$b.css({"bottom":0,"z-index":999,});$i.text(n+1);$(".zan").append($b);$b.animate({"bottom":100,"opacity":0},1000,function(){$b.remove();});var d = setInterval(function(){clearInterval(d);if($(".zan b").length == 1){$.post("",{zan:$i.text()})}},1000)e.stopPropagation();});});php代码：
<?php$path = "zan.txt";if(isset($_POST['zan'])){$num = (int)$_POST['zan'];$save = fopen($path,"w");fwrite($save,$num);fclose($save);echo "good";exit();$zan = file_exists($path) ? intval(file_get_contents($path)) : 0;}?>html代码：
<div class="main"><div class="zan"><em>看官们给了 <i><?php echo $zan; ?></i> 个赞</em></div></div>
配上合适的css样式：
.main { position: relative; font-size: 10pt; line-height: 18px; margin: 40px auto; width: 800px; height: 170px; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; -o-user-select: none; user-select: none;}.zan { position: absolute; top: 20%; left: 45%; width: 160px; height: 110px; background: url("zan.jpg") center no-repeat; cursor: pointer; opacity: 0.85; }.zan:active { opacity: 1; }.zan em { position: absolute; color: #333; font-style: normal; bottom: -15px; width: 100%; text-align: center; }.zan i { font-style: normal; color: #E94F06; }.zan b { position: absolute; color: #E94F06; font-style: normal; bottom: -15px; width: 100%; text-align: center; }就是这样，简单吧！
下面是完整代码：
<?php$path = "zan.txt";if(isset($_POST['zan'])){$num = (int)$_POST['zan'];$save = fopen($path,"w");fwrite($save,$num);fclose($save);echo "good";exit();}$zan = file_exists($path) ? intval(file_get_contents($path)) : 0;?><!doctype html><html><head><meta charset="utf-8"><title>我要点赞</title><style>.main { position: relative; font-size: 10pt; line-height: 18px; margin: 40px auto; width: 800px; height: 170px; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; -o-user-select: none; user-select: none;}.zan { position: absolute; top: 20%; left: 45%; width: 160px; height: 110px; background: url("zan.jpg") center no-repeat; cursor: pointer; opacity: 0.85; }.zan:active { opacity: 1; }.zan em { position: absolute; color: #333; font-style: normal; bottom: -15px; width: 100%; text-align: center; }.zan i { font-style: normal; color: #E94F06; }.zan b { position: absolute; color: #E94F06; font-style: normal; bottom: -15px; width: 100%; text-align: center; }</style></head><body><div class="main"><div class="zan"><em>看官们给了 <i><?php echo $zan; ?></i> 个赞</em></div></div><script src="jquery.min.js"></script><script>jQuery(document).ready(function($) {$(".zan").click(function(e){var $i=$(".zan i"), $b=$("<b>").text("+1"), n=parseInt($i.text());$b.css({"bottom":0,"z-index":999,});$i.text(n+1);$(".zan").append($b);$b.animate({"bottom":100,"opacity":0},1000,function(){$b.remove();});var d = setInterval(function(){clearInterval(d);if($(".zan b").length == 1){$.post("",{zan:$i.text()})}},1000)e.stopPropagation();});});</script></body></html>标题都说了是无上限点赞的，So，麦葱告诉大家个小诀窍：
/* 怒赞 */jQuery.noConflict();function zan() {setInterval(function () {jQuery(".zan").click();zan();}, 600)}zan();当然，如果你使用了加速乐防CC（麦葱就是），怒赞请求量过多，会被屏蔽掉哦！除非你取消掉jQuery里的POST
希望本文所述对大家jQuery程序设计有所帮助。
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