54 lines
1.3 KiB
PHP
54 lines
1.3 KiB
PHP
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<?php
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namespace enshrined\svgSanitize;
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class Helper
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{
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/**
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* @param \DOMElement $element
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* @return string|null
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*/
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public static function getElementHref(\DOMElement $element)
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{
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if ($element->hasAttribute('href')) {
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return $element->getAttribute('href');
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}
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if ($element->hasAttributeNS('http://www.w3.org/1999/xlink', 'href')) {
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return $element->getAttributeNS('http://www.w3.org/1999/xlink', 'href');
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}
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return null;
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}
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/**
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* @param string $href
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* @return string|null
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*/
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public static function extractIdReferenceFromHref($href)
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{
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if (!is_string($href) || strpos($href, '#') !== 0) {
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return null;
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}
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return substr($href, 1);
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}
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/**
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* @param \DOMElement $needle
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* @param \DOMElement $haystack
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* @return bool
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*/
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public static function isElementContainedIn(\DOMElement $needle, \DOMElement $haystack)
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{
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if ($needle === $haystack) {
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return true;
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}
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foreach ($haystack->childNodes as $childNode) {
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if (!$childNode instanceof \DOMElement) {
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continue;
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}
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if (self::isElementContainedIn($needle, $childNode)) {
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return true;
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}
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}
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return false;
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}
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}
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