public static function singleton()
 {
     if (!isset(self::$instance)) {
         $nombreClase = __CLASS__;
         self::$instance = new $nombreClase();
     }
     return self::$instance;
 }
<?php

include 'fakeFBdetector.php';
$detect = new FakeFBDetector();
$result = null;
//Check if the ID exists
$profile_id = $_POST['id'];
if (isset($profile_id)) {
    if ($detect->isFakeFacebook($profile_id)) {
        $result = "fb falso";
    } else {
        $result = "fb real";
    }
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Fake Facebook Detector By James Jara and Luis Montero</title>
<style type="text/css">
<!--
body {
	background-color: #003366;
}
.Estilo1 {
	font-size: 24px;
	color: #FFFFFF;
}
.Estilo2 {
	color: #FFFFFF;