Sanitize::strip_tag( string $tag, DOMDocument $document, DOMXPath $xpath, SimplePie\int-mask-of<SimplePie::CONSTRUCT_*> $type ): void

646    protected function strip_tag(string $tag, DOMDocument $document, DOMXPath $xpath, int $type)647    {648        $elements = $xpath->query('body//' . $tag);649 650        if ($elements === false) {651            throw new \SimplePie\Exception(sprintf(652                '%s(): Possibly malformed expression, check argument #1 ($tag)',653                __METHOD__654            ), 1);655        }656 657        if ($this->encode_instead_of_strip) {658            foreach ($elements as $element) {659                $fragment = $document->createDocumentFragment();660 661                // For elements which aren't script or style, include the tag itself662                if (!in_array($tag, ['script', 'style'])) {663                    $text = '<' . $tag;664                    if ($element->attributes !== null) {665                        $attrs = [];666                        foreach ($element->attributes as $name => $attr) {667                            $value = $attr->value;668 669                            // In XHTML, empty values should never exist, so we repeat the value670                            if (empty($value) && ($type & \SimplePie\SimplePie::CONSTRUCT_XHTML)) {671                                $value = $name;672                            }673                            // For HTML, empty is fine674                            elseif (empty($value) && ($type & \SimplePie\SimplePie::CONSTRUCT_HTML)) {675                                $attrs[] = $name;676                                continue;677                            }678 679                            // Standard attribute text680                            $attrs[] = $name . '="' . $attr->value . '"';681                        }682                        $text .= ' ' . implode(' ', $attrs);683                    }684                    $text .= '>';685                    $fragment->appendChild(new \DOMText($text));686                }687 688                $number = $element->childNodes->length;689                for ($i = $number; $i > 0; $i--) {690                    if (($child = $element->childNodes->item(0)) !== null) {691                        $fragment->appendChild($child);692                    }693                }694 695                if (!in_array($tag, ['script', 'style'])) {696                    $fragment->appendChild(new \DOMText('</' . $tag . '>'));697                }698 699                if (($parentNode = $element->parentNode) !== null) {700                    $parentNode->replaceChild($fragment, $element);701                }702            }703 704            return;705        } elseif (in_array($tag, ['script', 'style'])) {706            foreach ($elements as $element) {707                if (($parentNode = $element->parentNode) !== null) {708                    $parentNode->removeChild($element);709                }710            }711 712            return;713        } else {714            foreach ($elements as $element) {715                $fragment = $document->createDocumentFragment();716                $number = $element->childNodes->length;717                for ($i = $number; $i > 0; $i--) {718                    if (($child = $element->childNodes->item(0)) !== null) {719                        $fragment->appendChild($child);720                    }721                }722 723                if (($parentNode = $element->parentNode) !== null) {724                    $parentNode->replaceChild($fragment, $element);725                }