My current project involves extracting meta tags from websites and displaying the results. The code I am using has been working well, but I have encountered an issue...
This is the code snippet in question:
static private function _parse($HTML) {
$old_libxml_error = libxml_use_internal_errors(true);
$doc = new DOMDocument();
$doc->loadHTML($HTML);
libxml_use_internal_errors($old_libxml_error);
$tags = $doc->getElementsByTagName('meta');
if (!$tags || $tags->length === 0) {
return false;
}
$page = new self();
foreach ($tags AS $tag) {
if ($tag->hasAttribute('property') &&
strpos($tag->getAttribute('property'), 'og:') === 0) {
$key = strtr(substr($tag->getAttribute('property'), 3), '-', '_');
$page->_values[$key] = $tag->getAttribute('content');
}
}
if (empty($page->_values)) { return false; }
return $page;
}
While this code works flawlessly for URLs with meta tags using the attribute 'property' (e.g. <meta property="title">), some URLs use the 'name' attribute instead (e.g. <meta name="title">)...
Therefore, I need to come up with a solution that can extract values from 'property', and if empty, retrieve values from 'name' instead...
I have attempted a few approaches so far without success... any suggestions?