title: Why strings don't appear in "String translation" of WPML?
body: <p>I have in my php files string like this:</p>
  
  <pre><code>&lt;?php
  __('My string A', 'a_theme');
  _e('My string B', 'a_theme');
  ?&gt;
  </code></pre>
  
  <p>and there are not appearing in "String translation" .</p>
  
  <p>I have also bought and installed this theme: <a href="http://preview.ait-themes.com/index.php?bartype=desktop&amp;theme=touroperator" rel="noreferrer">http://preview.ait-themes.com/index.php?bartype=desktop&amp;theme=touroperator</a> and strings from that theme aren't also appearing in "Strings translation" of WPML.</p>
  
  <p>This is one example of string which was already in theme when I installed it: </p>
  
  <pre><code>&lt;input type="text" id="dir-searchinput-location" class="dir-searchinput-select" placeholder="{__ 'Destination'}"&gt;
  </code></pre>
  
  <p>Is there some extra configuration which I need to do or something else?</p>
  
  <p>Thanks for help</p>