title: Omitting the second part of the ternary operator
body: <p>Given the following expression:</p>
  
  <pre><code>$att['menutext'] = isset($attrib_in['i_menu_text']) ? : $this-&gt;getID();
  </code></pre>
  
  <p>If it evaluates to true, will <code>$att['menutext']</code> be set to <code>true</code> or <code>$this-&gt;getID()</code>?</p>