    public function start()
    {
        if ($this->started) {
            return true;
        }

        $this->loadSession();
        if (!$this->saveHandler->isWrapper() && !$this->saveHandler->isSessionHandlerInterface()) {
            // This condition matches only PHP 5.3 + internal save handlers
            $this->saveHandler->setActive(true);
        }

        return true;
    }
The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.