IRI::absolutize( SimplePie\IRI|string $base, SimplePie\IRI|string $relative ): SimplePie\IRI|false

235    public static function absolutize($base, $relative)236    {237        if (!($relative instanceof IRI)) {238            $relative = new IRI($relative);239        }240        if (!$relative->is_valid()) {241            return false;242        } elseif ($relative->scheme !== null) {243            return clone $relative;244        } else {245            if (!($base instanceof IRI)) {246                $base = new IRI($base);247            }248            if ($base->scheme !== null && $base->is_valid()) {249                if ($relative->get_iri() !== '') {250                    if ($relative->iuserinfo !== null || $relative->ihost !== null || $relative->port !== null) {251                        $target = clone $relative;252                        $target->scheme = $base->scheme;253                    } else {254                        $target = new IRI();255                        $target->scheme = $base->scheme;256                        $target->iuserinfo = $base->iuserinfo;257                        $target->ihost = $base->ihost;258                        $target->port = $base->port;259                        if ($relative->ipath !== '') {260                            if ($relative->ipath[0] === '/') {261                                $target->ipath = $relative->ipath;262                            } elseif (($base->iuserinfo !== null || $base->ihost !== null || $base->port !== null) && $base->ipath === '') {263                                $target->ipath = '/' . $relative->ipath;264                            } elseif (($last_segment = strrpos($base->ipath, '/')) !== false) {265                                $target->ipath = substr($base->ipath, 0, $last_segment + 1) . $relative->ipath;266                            } else {267                                $target->ipath = $relative->ipath;268                            }269                            $target->ipath = $target->remove_dot_segments($target->ipath);270                            $target->iquery = $relative->iquery;271                        } else {272                            $target->ipath = $base->ipath;273                            if ($relative->iquery !== null) {274                                $target->iquery = $relative->iquery;275                            } elseif ($base->iquery !== null) {276                                $target->iquery = $base->iquery;277                            }278                        }279                        $target->ifragment = $relative->ifragment;280                    }281                } else {282                    $target = clone $base;283                    $target->ifragment = null;284                }285                $target->scheme_normalization();286                return $target;287            }288 289            return false;290        }291    }