Writing an html dump on a Behat failure

FeatureContext.php

public function recordFailedEvent($event) {
    $fileName = $this->timestamp;
    // TODO: Make this a setting in behat.yml?
    $html_dump_path = 'failures';

    $message = '';
    $session = $this->getSession();
    $page = $session->getPage();
    $driver = $session->getDriver();
    $date = date('Y-m-d H:i:s');
    $url = $session->getCurrentUrl();
    $html = $page->getContent();


    $event_class = get_class($event);
    if (strpos($event_class, 'OutlineExampleEvent') !== FALSE) {
      $scenario = $event->getOutline();
    } elseif (strpos($event_class, 'ScenarioEvent') !== FALSE) {
      $scenario = $event->getScenario();
    }
    if ($scenario) {
      $feature_file_full = $scenario->getFeature()->getFile();
    } else {
      $feature_file_full = 'failure';
    }
    $ff = explode('/', $feature_file_full);
    $feature_file_name = array_pop($ff);

    if (!file_exists($html_dump_path)) {
      mkdir($html_dump_path);
    }

    $html = "<!-- HTML dump from behat  \nDate: $date  \nUrl:  $url  -->\n " . $html;

    $htmlCapturePath = $html_dump_path . '/' . $fileName . '.' . $feature_file_name . '.html';
    file_put_contents($htmlCapturePath, $html);

    $message .= "\nHTML available at: " . $htmlCapturePath;


    if ($driver instanceof \Behat\Mink\Driver\Selenium2Driver) {
      if (!file_exists($html_dump_path)) {
        mkdir($html_dump_path);
      }

      $screenshot = $driver->getScreenshot();
      $screenshotFilePath = $html_dump_path . '/' . $fileName . '.png';
      file_put_contents($screenshotFilePath, $screenshot);

      $message .= "\nScreenshot available at: " . $screenshotFilePath;
    }

    print $message . PHP_EOL;
  }