文章或者观点说说等点赞功能实现(thinkphp)

前端的代码：

<!-- 点赞 -->
<div class='btm'><a class='zan' id="{$article.id}" href="javascript:void(0);">赞(<span>{$article.likescount}</span>)</a></div>

当然数据的处理用ajax,不过先要引入jquery和jquery.cookie.js,这个就自行百度下载吧。前端会用cookie来限制重复点赞的效果。

js部分：

$(".zan").live('click',function(){
        var Oa=$(this);
        var id=Oa.attr('id');//获取id属性
        var vl=Oa.find("span").text();
            vl=parseInt(vl)+1;
        if(!$.cookie(id)){
            // console.log('没有缓存');
            $.post("{:U("Article/zan")}",{id:id},function(data){
                    console.log(data)
                if(data.status=='ok'){
                    alert('点赞+1');//模拟异步数据加1
                    $.cookie(id,id);//改变flag初始值，确保函数只执行一次
                    Oa.find("span").text(vl);//页面元素加1
                }
            },'json'); 
        }else{
            // console.log('有缓存');
            alert('您已经点过赞了!');
        }
        return false;
    })

后端接收数据：IndexController.class.php

public function zan(){
      $data[‘id‘]=isset($_POST[‘id‘])?intval(trim($_POST[‘id‘])):0;
      $db=M(‘article‘);
      $res = $db->where($data)->setInc(‘zan‘);
      if($res){
        $this->ajaxReturn($data,‘ok‘,1);
        exit();
      }else{
        $this->ajaxReturn($data,‘fail‘,0);
        exit();
      }
    }

jquery.cookie.js：

/*!
 * jQuery Cookie Plugin v1.4.1
 * https://github.com/carhartl/jquery-cookie
 *
 * Copyright 2006, 2014 Klaus Hartl
 * Released under the MIT license
 */
(function (factory) {
    if (typeof define === 'function' && define.amd) {
        // AMD (Register as an anonymous module)
        define(['jquery'], factory);
    } else if (typeof exports === 'object') {
        // Node/CommonJS
        module.exports = factory(require('jquery'));
    } else {
        // Browser globals
        factory(jQuery);
    }
}(function ($) {

    var pluses = /+/g;

    function encode(s) {
        return config.raw ? s : encodeURIComponent(s);
    }

    function decode(s) {
        return config.raw ? s : decodeURIComponent(s);
    }

    function stringifyCookieValue(value) {
        return encode(config.json ? JSON.stringify(value) : String(value));
    }

    function parseCookieValue(s) {
        if (s.indexOf('"') === 0) {
            // This is a quoted cookie as according to RFC2068, unescape...
            s = s.slice(1, -1).replace(/\"/g, '"').replace(/\\/g, '\');
        }

        try {
            // Replace server-side written pluses with spaces.
            // If we can't decode the cookie, ignore it, it's unusable.
            // If we can't parse the cookie, ignore it, it's unusable.
            s = decodeURIComponent(s.replace(pluses, ' '));
            return config.json ? JSON.parse(s) : s;
        } catch(e) {}
    }

    function read(s, converter) {
        var value = config.raw ? s : parseCookieValue(s);
        return $.isFunction(converter) ? converter(value) : value;
    }

    var config = $.cookie = function (key, value, options) {

        // Write

        if (arguments.length > 1 && !$.isFunction(value)) {
            options = $.extend({}, config.defaults, options);

            if (typeof options.expires === 'number') {
                var days = options.expires, t = options.expires = new Date();
                t.setMilliseconds(t.getMilliseconds() + days * 864e+5);
            }

            return (document.cookie = [
                encode(key), '=', stringifyCookieValue(value),
                options.expires ? '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE
                options.path    ? '; path=' + options.path : '',
                options.domain  ? '; domain=' + options.domain : '',
                options.secure  ? '; secure' : ''
            ].join(''));
        }

        // Read

        var result = key ? undefined : {},
            // To prevent the for loop in the first place assign an empty array
            // in case there are no cookies at all. Also prevents odd result when
            // calling $.cookie().
            cookies = document.cookie ? document.cookie.split('; ') : [],
            i = 0,
            l = cookies.length;

        for (; i < l; i++) {
            var parts = cookies[i].split('='),
                name = decode(parts.shift()),
                cookie = parts.join('=');

            if (key === name) {
                // If second argument (value) is a function it's a converter...
                result = read(cookie, value);
                break;
            }

            // Prevent storing a cookie that we couldn't decode.
            if (!key && (cookie = read(cookie)) !== undefined) {
                result[name] = cookie;
            }
        }

        return result;
    };

    config.defaults = {};

    $.removeCookie = function (key, options) {
        // Must not alter options, thus extending a fresh object...
        $.cookie(key, '', $.extend({}, options, { expires: -1 }));
        return !$.cookie(key);
    };

}));

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