public function get($url)
{
try {
$head = $this->dataGrabber->getHtmlHead($url);
$result = preg_replace("/(.*)meta\\s*property=\"og:image\"\\s*content=\"(.+?)\"(.*)/s", '$2', $head);
if (strlen($result) === strlen($head)) {
// check <meta content="..." property="og:image">
$result = preg_replace("/(.*)meta\\s*content=\"(.+?)\"\\s*property=\"og:image\"(.*)/s", '$2', $head);
}
$result = strlen($result) !== strlen($head) ? $result : '';
} catch (RemoteDataGrabberException $e) {
throw new PreviewNotLinkException();
}
if (empty($result)) {
throw new PreviewNotExecutableException();
}
return $result;
}
