/**
* Given the URL of a website, returns a single linked array containing the URL and title of a feed
* (whether Microformats or RSS / Atom). The function will attempt to discover RSS and Atom feeds in
* the page if this is an HTML site. Returns false if there is no feed.
* @param $url
* @return array|false
*/
function getFeedDetails($url)
{
if (!filter_var($url, FILTER_VALIDATE_URL)) {
return false;
}
$client = new Webservice();
if ($result = $client->get($url)) {
$feed = array();
if (!empty($result['content'])) {
$feed['webmention'] = Webmention::supportsMentions($url, $result['content']);
if ($html = @\DOMDocument::loadHTML($result['content'])) {
$xpath = new \DOMXpath($html);
$title = $xpath->query('//title')->item(0)->nodeValue;
if ($xpath->query("//*[contains(concat(' ', @class, ' '), ' h-entry ')]")->length > 0) {
$feed['type'] = 'mf2';
$feed['url'] = $url;
if (!empty($title)) {
$feed['title'] = $title;
}
return $feed;
}
if ($rss_url = $this->findXMLFeedURL($html)) {
$feed['type'] = 'xml';
$feed['url'] = $rss_url;
if (!empty($title)) {
$feed['title'] = $title;
}
return $feed;
}
}
if ($xml = @simplexml_load_string($result['content'])) {
if (!empty($xml->rss->channel->item) || !empty($xml->feed) || !empty($xml->channel->item)) {
$feed['type'] = 'xml';
$feed['url'] = $url;
if (!empty($xml->rss->channel->title)) {
$feed['title'] = $xml->rss->channel->title;
} else {
if (!empty($xml->channel->title)) {
$feed['title'] = $xml->channel->title;
} else {
if (!empty($xml->title)) {
$feed['title'] = $xml->title;
}
}
}
return $feed;
}
}
}
}
return false;
}
