title: When do changes to wp-config.php take effect?
body: <p>I am trying to enable debugging on a WordPress site to debug a plugin.  I read about the <a href="http://codex.wordpress.org/Debugging_in_WordPress" rel="noreferrer">WP_DEBUG</a> setting and I added the following to my <code>wp-config.php</code> file:</p>
  
  <pre><code>define('WP_DEBUG', true);
  define('WP_DEBUG_LOG', true);
  define('WP_DEBUG_DISPLAY', false);
  </code></pre>
  
  <p>My understanding is that I should see a <code>debug.log</code> file in my <code>wp-content</code> directory.  I haven't seen anything yet, but I don't know if that is because there aren't any errors that have been logged, or if something needs to be restarted for these settings to take effect.  So my question is when are the <code>wp-config.php</code> settings read and do I need to restart any services to make changes take effect.</p>