think\console\Input::parseLongOption PHP Method

    private function parseLongOption($token)
    {
        $name = substr($token, 2);
        if (false !== ($pos = strpos($name, '='))) {
            $this->addLongOption(substr($name, 0, $pos), substr($name, $pos + 1));
        } else {
            $this->addLongOption($name, null);
        }
    }