Enviar notificação quando o post receber comentários no form de comments do facebook (WordPress)

gistfile1.js

        jQuery(function($) {
            $.data(document.body, 'ajaxUrl', '<?php echo admin_url('admin-ajax.php'); ?>');
            FB.init({
                appId  : '1419904448233697',
                status : true, // check login status
                cookie : true, // enable cookies to allow the server to access the session
                xfbml  : true  // parse XFBML
            });
            FB.Event.subscribe('comment.create',
                function(response) {
                    var post_url = response.href;
                    $.get($.data(document.body, 'ajaxUrl' ), {
                            action: 'facebook_comment_post',
                            post_url: post_url
                        },
                        function(data){
                            
                        },
                        "json"
                    );
                }
            );

            FB.Event.subscribe('comment.remove',
                function (response) {
                    var post_url = response.href;
                }
            );
        });