¿Cómo mostrar el número de veces que se ha compartido una URL sin usar el botón de Facebook?

<!-- count facebook -->
    <script>
        var permalink = '<?php the_permalink() ?>';

        $(document).ready(function() {

            var getFacebookCount = function () {
                $.getJSON('https://graph.facebook.com/'+permalink, function(data){
                    var facebookShares = parseInt(data.share.share_count);
                    if (facebookShares) {
                        $('.facebook').append(kFormatter(facebookShares));
                    }else{
                        $('.facebook').append(kFormatter(0));
                    }
                });
            };

            getFacebookCount();

        });

        function kFormatter(num) {
            return num > 999 ? (num/1000).toFixed(1) + 'k' : num;
        }

    </script>

<span class="facebook"></span>

<?php$api = "https://graph.facebook.com/https://www.facebook.com";$curl = curl_init($api);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);//execute the session$curl_response = curl_exec($curl);//finish off the sessioncurl_close($curl);
$api_json = json_decode($curl_response, true);//print_r($curl_jason);
echo $api_json['share']['share_count'];?>