title: Warning: Use of undefined constant all - assumed 'all' (this will throw an Error in a future version of PHP) in ............ on line 8
body: <pre><code>// adding the CSS and JS files
  function gt_setup(){
      wp_enqueue_style('google-fonts',  '//fonts.googleapis.com/css?family=Roboto|Roboto+Condensed|Roboto+Slab');
      wp_enqueue_style('fontawesome', '//href=&quot;font-awesome-4.7.0/css/font-awesome.min.css');
      wp_enqueue_style('style', get_stylesheet_uri('style.css'), NULL, microtime(), all);
      wp_enqueue_script(&quot;main&quot;, get_theme_file_uri('/js/main.js' ), NULL, microtime(), true);
  }
  
  add_action('wp_enqueue_scripts', 'gt_setup');
  
  ?&gt;
  </code></pre>