/**
  * Binds the form with input values, adding recaptcha values
  * @param array $taintedValues  An array of input values
  * @param array $taintedFiles   An array of uploaded files (in the $_FILES or $_GET format)
  */
 public function bind(array $taintedValues = null, array $taintedFiles = null)
 {
     if (sfConfig::get('app_recaptcha_active', false)) {
         $request = sfContext::getInstance()->getRequest();
         $taintedValues['challenge'] = $request->getParameter('recaptcha_challenge_field');
         $taintedValues['response'] = $request->getParameter('recaptcha_response_field');
     }
     parent::bind($taintedValues, $taintedFiles);
 }