getChildElementNodes(); if ($this->hasAttribute('itemref')) { $tokens = $this->tokenizeAttribute('itemref'); foreach ($tokens as $token) { $references = $this->ownerDocument->xpath->query('//*[@id="'.$token.'"]'); if ($first = $references->item(0)) { $pending[] = $first; } } } while ($pending) { $current = array_pop($pending); foreach ($memory as $memory_item) { if ($current->isSameNode($memory_item)) { continue 2; // Skip next part and continue while loop if memory contains $current } } $memory[] = $current; if (! $current->hasAttribute('itemscope')) { $pending = array_merge($pending, $current->getChildElementNodes()); } if ($current->hasAttribute('itemprop') && $current->hasPropertyNames()) { $results[] = $current; } } return array_reverse($results); } /** * @return bool */ public function hasPropertyNames() : bool { return !empty($this->tokenizeAttribute('itemprop')); } /** * @return array */ public function getPropertyNames() : array { $tokens = $this->tokenizeAttribute('itemprop'); $properties = []; foreach ($tokens as $token) { if (!$this->isAbsoluteUri($token) && $this->tokenizeAttribute('itemtype')) { $token = /*$vocabularyIdentifier . */ $token; } $properties[] = $token; } return array_unique($properties); } /** * @return $this|string */ public function getPropertyValue() { if ($this->hasAttribute('itemscope')) { return $this; } if ($this->hasAttribute('content')) { return $this->getAttribute('content'); } $base = $this->ownerDocument->documentURI; switch ($this->tagName) { case 'audio': case 'embed': case 'iframe': case 'img': case 'source': case 'track': case 'video': if ($this->hasAttribute('src')) { $result = $this->getAttribute('src'); // @todo check against protocol relative urls like "//example.com/test.jpg" return $this->isAbsoluteUri($result) ? $result : $base.$result; } // No break case 'a': case 'area': case 'link': if ($this->hasAttribute('href')) { $result = $this->getAttribute('href'); return $this->isAbsoluteUri($result) ? $result : $base.$result; } // No break case 'object': if ($this->hasAttribute('data')) { $result = $this->getAttribute('data'); return $this->isAbsoluteUri($result) ? $result : $base.$result; } // No break case 'data': case 'meter': if ($this->hasAttribute('value')) { return $this->getAttribute('value'); } // No break case 'time': if ($this->hasAttribute('datetime')) { return $this->getAttribute('datetime'); } // No break default: return $this->textContent; } } /** * Checks a string to see if its absolute uri or not * Note: As it uses a simple regex to check, it is not that reliable * * @see \preg_match() for return values * * @param string $uri * * @return false|int */ protected function isAbsoluteUri(string $uri) { return preg_match("/^\w+:/", trim($uri)); } /** * Filters out TextNodes etc. and returns child ElementNodes as array * * @return array Result array which contains child ElementNodes */ protected function getChildElementNodes() { $childNodes = []; foreach ($this->childNodes as $childNode) { if ($childNode->nodeType == XML_ELEMENT_NODE) { $childNodes[] = $childNode; } } return $childNodes; } /** * Tokenizes value of given attribute * * @param string $attributeName Name of the attribute * * @return array|array[]|false|string[] */ public function tokenizeAttribute(string $attributeName) { $attribute = []; if ($this->hasAttribute($attributeName)) { $attribute = $this->tokenize($this->getAttribute($attributeName)); } return $attribute; } /** * Splits given attribute value in space characters to array * * @see \preg_split() for possible return values and behaviour * * @param string $attribute * * @return array[]|false|string[] */ protected function tokenize(string $attribute) { return preg_split('/\s+/', trim($attribute)); } }