    public function isActive()
    {
        if (PHP_VERSION_ID >= 50400) {
            return $this->active = \PHP_SESSION_ACTIVE === session_status();
        }

        return $this->active;
    }
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.