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<?php
namespace PubPeerFoundation\PublicationDataExtractor\Resources\Extractors;
use Symfony\Component\DomCrawler\Crawler;
class PubmedWebsite implements Extractor, ProvidesIdentifiersData, ProvidesAffiliationsData
{
protected $document;
protected $searchTree;
protected $output = [];
protected $crawler;
public function __construct($document)
$this->crawler = new Crawler();
$this->crawler->addHtmlContent($document);
}
public function extract(): array
$this->extractIdentifiersData();
$this->extractAffiliationsData();
return $this->output;
public function extractIdentifiersData()
$pubmed = stringify($this->crawler->evaluate('string(//input[@id="absid"]/@value)'));
if (! empty($pubmed)) {
$this->output['identifiers'][] = [
'value' => $pubmed,
'type' => 'pubmed',
];
public function extractAffiliationsData()
$affiliations = $this->crawler->evaluate('//div[@class="afflist"]/dl/dd');
foreach ($affiliations as $affiliation) {
$this->output['affiliations'][] = [
'name' => (string) $affiliation->textContent,
PubPeerFoundation /
PublicationDataExtractor
