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="https://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"      }    }   } }