How to Moderate Facebook Comments in mediawki - facebook

Question

I am using a widget Facebook Comment in my MediaWiki site.
The widget is showing facebook comment box properly and it is functioning good except that I can't moderate the comments.
The installation says:
You have to set fb:app_id open graph property too indicate to Facebook that you're the administrator of the site and can moderate comments and add section.
But I didn't understad this line. If someone know the way please post with some example.

Answer 1

Looks like you have not added an App Id, go to https://developers.facebook.com/tools/
Click on "Apps" pull down menu, Click "Create a New App" and create a new application with your website name, it will generate an Application Id, use that in your website meta tag as below:
<meta property="fb:app_id" content="<your App id>" />
And ofcourse other meta tags as well,
<meta property="fb:admins" content="<your admin id>" />
<meta property="og:image" content="<website logo image url>" />
<meta property="og:site_name" content="<Site name>" />
<meta property="og:url" content="<webpage completel url>" />
<meta property="og:title" content="<title>" />
After that you should be set!

Answer 2

I had the same problem. After hours, I found a solution... In facts there is very little errors in the code on the widget page...
In LocalSettings.php, copy-paste this (xxxxx = your FB IPapp number) and it will work:
$wgExtensionFunctions[] = 'mww_fb_app_id';
function mww_fb_app_id() {
global $wgOut;
$wgOut->addHeadItem ( "fb:app_id" , '<meta property="fb:app_id" content="xxxxx"/>');
}