<?php
			
/**
 * Webhook for Time Bot- Facebook Messenger Bot
 * User: adnan
 * Date: 24/04/16
 * Time: 3:26 PM
 */

$input = json_decode(file_get_contents('php://input'), true);
error_log(print_r($input,true));

$verify_token = "abc123";
$hub_verify_token = null;

if(isset($_REQUEST['hub_challenge'])) {
    $challenge = $_REQUEST['hub_challenge'];
    $hub_verify_token = $_REQUEST['hub_verify_token'];
}


if ($hub_verify_token === $verify_token) {
    echo $challenge;
}


$input = json_decode(file_get_contents('php://input'), true);
error_log(print_r($input,true));