xyzshop/mobile/refill_gftd.php

<?php

require_once(BASE_HELPER_PATH . '/refill/RefillFactory.php');

$content = $_SERVER['post_content'];
$input = json_decode($content,true);
refill\RefillFactory::instance()->notify('gftd',$input);

$ret = ['state' => "success"];
echo (json_encode($ret));