我想出了一种从任何Facebook页面网址获取页面ID的更好方法，但我不确定是否还有更好的选择，但这是编码我曾经使用过的代码:

I figured out a better way to get page id from any facebook page url, I am not sure if there is even better option to do this but here is the code what I have used:

$fbUrl = "https://www.facebook.com/Lo-stile-di-Anna-1521824524722026";
$graphUrl = "https://graph.facebook.com/?id=".$fbUrl."&access_token=xxxxx&fields=id";
$output = file_get_contents($graphUrl);
$output = json_decode($output, TRUE);
echo $output["id"]; // returns 1521824524722026

我尝试了各种Facebook网址，并且每次都能奏效，希望这对以后的人有所帮助.

I tried this with various facebook urls and it worked everytime, hope this helps someone in the future.