My Code is showed below:
session_start();
require_once __DIR__ . '\Facebook.php';
$fb = new Facebook\Facebook([
'app_id' => 'App ID',
'app_secret' => 'App Secreat',
'default_graph_version' => 'v2.5'
]);
The problem is :
Fatal error: Class 'Facebook\Facebook' not found in C:\xampp\htdocs\Facebook.php on line 4
How can i define Class Facebook?