title: Use Heroku config vars with PHP?
body: <p>I've been able to find information on how to use config vars in Heroku for Python, node.js, and some other languages, but not for PHP. Can you use them with PHP, or is it not supported?</p>
  
  <p><a href="https://devcenter.heroku.com/articles/config-vars" rel="noreferrer">This article</a> shows how to do it for Python, Java, and Ruby, but not PHP.</p>