Synology - Slack Notifications

slack.php

<?php
  $msg = 'Test';

  parse_str($_SERVER['QUERY_STRING'], $output);

  if ($output['token'] != 'TOKEN') {
    exit();
  }

  $msg = $output['message'];
  $webhook_url = $output['webhook'];

  $slack_webhook = 'https://hooks.slack.com/services/'.$webhook_url;

  $message = array('payload' => json_encode(array('text' => $msg)));

  $c = curl_init($slack_webhook);
  curl_setopt($c, CURLOPT_SSL_VERIFYPEER, false);
  curl_setopt($c, CURLOPT_POST, true);
  curl_setopt($c, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($c, CURLOPT_POSTFIELDS, $message);
  curl_exec($c);
  curl_close($c);
?>