framework/web/widgets/captcha/CCaptchaAction.php
protected function getSessionKey()
	{
		return self::SESSION_VAR_PREFIX . Yii::app()->getId() . '.' . $this->getController()->getUniqueId() . '.' . $this->getId();
	}
protected function getSessionKey()
	{
		return self::SESSION_VAR_PREFIX . Yii::app()->getId() . '.' . $this->getController()->getUniqueId() . '.' . $this->getId();
	}
protected function getSessionKey ( ) { return self :: SESSION_VAR_PREFIX . Yii :: app ( ) -> getId ( ) . '.' . $ this -> getController ( ) -> getUniqueId ( ) . '.' . $ this -> getId ( ) ; }
Returns the session variable name used to store verification code.
@return string the session variable name
Returns the session variable name used to store verification code .