title: Class MongoRegex() not found
body: <p>I trying example from php.net:
  - <a href="http://php.net/manual/en/class.mongoregex.php" rel="nofollow">http://php.net/manual/en/class.mongoregex.php</a></p>
  
  <p>when performing a code there is a mistake:</p>
  
  <blockquote>
    <p>Class App\Http\Controllers\MongoRegex not found</p>
  </blockquote>
  
  <p>But <code>new MongoClient()</code> work fine.</p>