title: PHP 7 debugger settings in eclipse
body: <p>I've changed the version of php from 5.6 to the new version: 7.0.
  So far, everything works fine; but some new features of php 7 are not recognized by the debugger. For example the line:</p>
  
  <pre><code>$flag = $params['flag'] ?? true;
  </code></pre>
  
  <p>is marked by the debugger - symbol <code>?</code> not recognized, but when I run the program it is working correctly!</p>
  
  <p>What can I do to fix this?</p>