如何将评论数拉入带有facebook评论的php变量？

我在我的网站上使用fb评论，我需要把评论的数量拉到一个php变量中，这样我就可以操纵它了。我该怎么做？提前感谢。

从FQL表中获取评论框计数：

PHP示例：

$query = urlencode("select commentsbox_count from link_stat where url = 'http://techcrunch.com/2012/03/31/dramacrunch/'");
$response = json_decode(file_get_contents("https://graph.facebook.com/fql?q=$query"), TRUE);
if(!empty($response['data'][0]['commentsbox_count'])) {
    echo $response['data'][0]['commentsbox_count'] . " comments were found!";
}

$query = urlencode("select commentsbox_count from link_stat where url = 'http://techcrunch.com/2012/03/31/dramacrunch/'");
$response = json_decode(file_get_contents("https://graph.facebook.com/fql?q=$query"), TRUE);
if(!empty($response['data'][0]['commentsbox_count'])) {
    echo $response['data'][0]['commentsbox_count'] . " comments were found!";
}