            $conditions[] = sprintf("\$this->has('%s')", $service);
        }

        if (!$conditions) {
            return '';
        }

        return implode(' && ', $conditions);
    }
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.