<?php

$payload = json_decode($_REQUEST["payload"]);

if ($payload->action == "closed" && $payload->pull_request->base->ref == "master" && $payload->pull_request->merged == "true") {

  exec("echo 'merged to master' > result");
}
else {
  exec("echo '".$payload->action."' > result");
  exec("echo '".$payload->pull_request->base->ref."' >> result");
  exec("echo '".$payload->pull_request->merged."' >> result");
}

?>