title: Using Environment variables in Wordpress wp-config
body: <p>I'm using phpfog.com for hosting and github.com for issue tracking, etc.
  I have two remotes setup, one to phpfog.com, and the other to github.</p>
  <p>In the back-end admin of phpfog you can define Environment Variables.  I did so there and want to use them in my wp-config file.</p>
  <p>Here's the code I used:</p>
  <pre class="lang-php prettyprint-override"><code>/** Hardened Salts for use on github.com, phpfog.com, etc.*/
  $AUTH_KEY = getenv('AUTH_KEY');
  $SECURE_AUTH_KEY = getenv('SECURE_AUTH_KEY');
  $LOGGED_IN_KEY = getenv('LOGGED_IN_KEY');
  $NONCE_KEY = getenv('NONCE_KEY');
  $AUTH_SALT = getenv('AUTH_SALT');
  $SECURE_AUTH_SALT = getenv('SECURE_AUTH_SALT');
  $LOGGED_IN_SALT = getenv('LOGGED_IN_SALT');
  $NONCE_SALT = getenv('NONCE_SALT');
  define('AUTH_KEY', $AUTH_KEY);
  define('SECURE_AUTH_KEY', $SECURE_AUTH_KEY);
  define('LOGGED_IN_KEY', $LOGGED_IN_KEY);
  define('NONCE_KEY', $NONCE_KEY);
  define('AUTH_SALT', $AUTH_SALT);
  define('SECURE_AUTH_SALT', $SECURE_AUTH_SALT);
  define('LOGGED_IN_SALT', $LOGGED_IN_SALT);
  define('NONCE_SALT', $NONCE_SALT);
  </code></pre>
  <p>There must be a cleaner way of doing this…</p>