declare.php

<?php get_count_facebook(); ?>

default endpoint

https://graph.facebook.com/fanpage

dev endpoint

https://graph.facebook.com/devsharing

get_count_facebook.php

<?php
function get_count_facebook() {
  $facebook_name = 'DevSharing';

  $fb_result = @json_decode(file_get_contents('https://graph.facebook.com/' . $facebook_name));
  $fan_count = number_format($fb_result->likes); 

  echo $fan_count;
}
?>

output.json

{
   "about": "DevSharing.com : more than just a simple page",
   "category": "Community",
   "description": "Computer IT News & Tips Programming \n\u0e23\u0e27\u0e21\u0e02\u0e48\u0e32\u0e27\u0e44\u0e2d\u0e17\u0e35 \u0e17\u0e34\u0e1b \u0e04\u0e27\u0e32\u0e21\u0e23\u0e39\u0e49 \u0e42\u0e1b\u0e23\u0e41\u0e01\u0e23\u0e21\u0e21\u0e34\u0e48\u0e07  ",
   "is_published": true,
   "talking_about_count": 3,
   "username": "DevSharing",
   "website": "http://www.DevSharing.com",
   "were_here_count": 0,
   "id": "445478558816822",
   "name": "DevSharing.com",
   "link": "http://www.facebook.com/DevSharing",
   "likes": 49,
   "cover": {
      "cover_id": 476765945688083,
      "source": "http://sphotos-d.ak.fbcdn.net/hphotos-ak-ash3/s720x720/576418_476765945688083_660646328_n.jpg",
      "offset_y": 0,
      "offset_x": 0
   }
}