Contao\Input::postUnsafeRaw PHP Method

    public static function postUnsafeRaw($strKey)
    {
        $strCacheKey = 'postUnsafeRaw';
        if (!isset(static::$arrCache[$strCacheKey][$strKey])) {
            $varValue = static::findPost($strKey);
            if ($varValue === null) {
                return $varValue;
            }
            static::$arrCache[$strCacheKey][$strKey] = $varValue;
        }
        return static::$arrCache[$strCacheKey][$strKey];
    }

 /**
  * Run the controller and parse the password template
  *
  * @return Response
  */
 public function run()
 {
     /** @var BackendTemplate|object $objTemplate */
     $objTemplate = new \BackendTemplate('be_password');
     if (\Input::post('FORM_SUBMIT') == 'tl_password') {
         $pw = \Input::postUnsafeRaw('password');
         $cnf = \Input::postUnsafeRaw('confirm');
         // The passwords do not match
         if ($pw != $cnf) {
             \Message::addError($GLOBALS['TL_LANG']['ERR']['passwordMatch']);
         } elseif (Utf8::strlen($pw) < \Config::get('minPasswordLength')) {
             \Message::addError(sprintf($GLOBALS['TL_LANG']['ERR']['passwordLength'], \Config::get('minPasswordLength')));
         } elseif ($pw == $this->User->username) {
             \Message::addError($GLOBALS['TL_LANG']['ERR']['passwordName']);
         } else {
             // Make sure the password has been changed
             if (\Encryption::verify($pw, $this->User->password)) {
                 \Message::addError($GLOBALS['TL_LANG']['MSC']['pw_change']);
             } else {
                 $this->loadDataContainer('tl_user');
                 // Trigger the save_callback
                 if (is_array($GLOBALS['TL_DCA']['tl_user']['fields']['password']['save_callback'])) {
                     foreach ($GLOBALS['TL_DCA']['tl_user']['fields']['password']['save_callback'] as $callback) {
                         if (is_array($callback)) {
                             $this->import($callback[0]);
                             $pw = $this->{$callback[0]}->{$callback[1]}($pw);
                         } elseif (is_callable($callback)) {
                             $pw = $callback($pw);
                         }
                     }
                 }
                 $objUser = \UserModel::findByPk($this->User->id);
                 $objUser->pwChange = '';
                 $objUser->password = \Encryption::hash($pw);
                 $objUser->save();
                 \Message::addConfirmation($GLOBALS['TL_LANG']['MSC']['pw_changed']);
                 $this->redirect('contao/main.php');
             }
         }
         $this->reload();
     }
     $objTemplate->theme = \Backend::getTheme();
     $objTemplate->messages = \Message::generate();
     $objTemplate->base = \Environment::get('base');
     $objTemplate->language = $GLOBALS['TL_LANGUAGE'];
     $objTemplate->title = \StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['pw_new']);
     $objTemplate->charset = \Config::get('characterSet');
     $objTemplate->action = ampersand(\Environment::get('request'));
     $objTemplate->headline = $GLOBALS['TL_LANG']['MSC']['pw_change'];
     $objTemplate->submitButton = \StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['continue']);
     $objTemplate->password = $GLOBALS['TL_LANG']['MSC']['password'][0];
     $objTemplate->confirm = $GLOBALS['TL_LANG']['MSC']['confirm'][0];
     return $objTemplate->getResponse();
 }