private static function extractLinks($sourceUrl, $html)
{
$links = array();
if (preg_match_all("/<link(?:\\s+\\w+=[\"'][^\"']*[\"'])+\\s*\\/?>/", $html, $matches)) {
foreach ($matches[0] as $match) {
if (preg_match_all("/(\\w+)=[\"']([^\"']*)[\"']/", $match, $submatches, PREG_SET_ORDER)) {
$attrs = array();
foreach ($submatches as $submatch) {
list(, $key, $value) = $submatch;
$attrs[strtolower($key)] = $value;
}
if (strcasecmp($attrs["rel"], "alternate") === 0 && (strcasecmp($attrs["type"], "application/rss+xml") === 0 || strcasecmp($attrs["type"], "application/atom+xml") === 0)) {
$link = new stdClass();
$link->title = $attrs["title"];
$link->url = FeedParser::resolveUrl($sourceUrl, $attrs["href"]);
$links[] = $link;
}
}
}
}
return $links;
}
