在PHP站点的页面上添加Facebook评论插件的实例教程

首先，需要在facebook创建一个APP，创建方法见https://developers.facebook.com/，APP有一项是填写Domain的，这里填写你website的Domain。（APP是绑定domain的，不能乱填）
然后就可以使用facebook comments plugins。

使用facebook comments plugins，可以在页面中插入facebook comments。
生成code方法：https://developers.facebook.com/docs/plugins/comments

例如：有一个页面是http://www.example.com/ ，在这个页面中插入以下代码便可以使用comments plugings。

    <!-- include facebook js sdk --> 
    <script id="facebook-jssdk" src="//connect.facebook.net/en_GB/all.js#xfbml=1&appId;=这里填写APPID"></script> 

    <!-- comments plugins --> 
    <fb:comments colorscheme="light" numposts="4" height="360px;" width="614px" href="http://www.example.com/" fb-xfbml-state="rendered" class="fb_iframe_widget"></fb:comments> 

在页面上显示如下

读取页面的分享总数与评论总数

    https://graph.facebook.com/?ids={YOUR_URL} 

{YOUR_URL} 需要 urlencode
例如：https://graph.facebook.com/?ids=http%3A%2F%2Fwww.example.com%2F
返回：

    { 
      "http://www.example.com/": { 
       "id": "http://www.example.com/", 
       "shares": 399517, 
       "comments": 392 
      } 
    } 

代码如下：

    <?php 
    $url = 'http://www.example.com/'; 
    $api = 'https://graph.facebook.com/?ids='; 

    $result = json_decode(file_get_contents($api.urlencode($url)), true); 

    print_r($result); 
    ?> 

读取页面评论列表

    https://graph.facebook.com/comments/?ids={YOUR_URL} 

{YOUR_URL} 需要 urlencode
例如：https://graph.facebook.com/comments/?ids=http%3A%2F%2Fwww.example.com%2F
返回：

    { 
      "http://www.example.com/": { 
       "comments": { 
         "data": [ 
          { 
            "id": "395320319544_27462154", 
            "from": { 
             "id": "100000223906701", 
             "name": "Thu\u1eadn Phan Thanh" 
            }, 
            "message": "hello moto", 
            "can_remove": false, 
            "created_time": "2013-10-07T10:01:40+0000", 
            "like_count": 1, 
            "user_likes": false 
          }, 
          { 
            "id": "395320319544_27877980", 
            "from": { 
             "id": "100001638736612", 
             "name": "L\u00e3 Minh" 
            }, 
            "message": "hi you", 
            "can_remove": false, 
            "created_time": "2013-11-13T02:57:01+0000", 
            "like_count": 4, 
            "user_likes": false 
          }, 
          { 
            "id": "395320319544_27879381", 
            "from": { 
             "id": "100004229015145", 
             "name": "Th\u00f9y Dung" 
            }, 
            "message": "Mg \u1ee7ng h\u1ed9 t\u1edb v\u1edbi nh\u1edb \u003C3", 
            "can_remove": false, 
            "created_time": "2013-11-13T05:38:12+0000", 
            "like_count": 3, 
            "user_likes": false 
          } 
          ... 
         ], 
         "paging": { 
          "cursors": { 
            "after": "MjU0", 
            "before": "Mzk4" 
          }, 
          "next": "https://graph.facebook.com/v1.0/395320319544/comments?limit=25&after;=MjU0" 
         } 
       } 
      } 
    } 

根据next的url再请求可以获取下一页的评论内容

代码如下：

    <?php 
    $url = 'http://www.example.com/'; 
    $api = 'https://graph.facebook.com/comments/?ids='; 

    $result = json_decode(file_get_contents($api.urlencode($url)), true); 

    print_r($result); 
    ?>