                        $cache[$key] = array_merge( $fallback_cache[$key], $cache[$key] );
                    }
                } else {
                    $cache[$key] = $fallback_cache[$key];
                }
            }

        }

        // save to cache for later retrieval
        $this->cache[$code] = $cache;

        return;
    }
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.