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我想在我的网站上显示一个文章列表，文章下方有作者、日期和评论字段，以便用户在打开文章之前就可以看到文章的评论数量。

评论来自facebook，我使用graph api每篇文章返回以下JSON代码，我如何从中获得评论总数？谢谢

我试过 json_decode 但得到的数组都是零计数。

{
   "http://www.withinzambia.com/technology-and-it/your-modem-isnt-that-fast.html": {
      "comments": {
         "data": [
            {
               "id": "10151004341202332_23086817",
               "from": {
                  "name": "Cindi Mutale",
                  "id": "1045450015732187"
               },
               "message": "Glad someone finally pointed this out.",
               "can_remove": false,
               "created_time": "2012-07-02T19:46:58+0000",
               "like_count": 0,
               "user_likes": false
            },
            {
               "id": "10151002332_23094740",
               "from": {
                  "name": "Chanda Mike",
                  "id": "1000034452054679"
               },
               "message": "my modem is 7mbps, so that's not 7MB per second?",
               "can_remove": false,
               "created_time": "2012-07-03T13:51:24+0000",
               "like_count": 0,
               "user_likes": false
            },
            {
               "id": "10151004341202332_23094782",
               "from": {
                  "name": "Precious Chulu",
                  "id": "100242343243281187"
               },
               "message": "The max for the modem in the picture is 7mbps, which is actually about 900kb when you divide by 8, so you will never download at more than 1mb per second with these modems even when MTN or Airtel upgrades the network.",
               "can_remove": false,
               "created_time": "2012-07-03T13:57:56+0000",
               "like_count": 0,
               "user_likes": false
            }
         ],
         "paging": {
            "next": "https://graph.facebook.com/10151004341202332/comments?value=1&redirect=1&limit=25&offset=25&__after_id=10151004341202332_23094782"
         }
      }
   }
}
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2 回答 2

1 
<?php
  ...
  $count = 0;
  $array = json_decode($input, true);
  foreach($array AS $website) {
    $count += count($website['comments']['data']);
  }
  ...
?>

$count 是答案。

奖金 ：）

于 2012-07-03T15:19:32.173 回答
0 
$jsonArr = ' ..your JSON array.. ';

$decodedArr = json_decode($jsonArr);

$num_comments = count($decodedArr->{'http://www.withinzambia.com/technology-and-it/your-modem-isnt-that-fast.html'}->comments->data);

echo $num_comments;

tested and works. be aware that if you load your JSON into a string, like i did here, single quotes will need to be escaped.

于 2012-07-03T15:23:06.980 回答