private function store_links(&$file, $hub, $self)
{
if (isset($file->headers['link']['hub']) || isset($file->headers['link']) && preg_match('/rel=hub/', $file->headers['link'])) {
return;
}
if ($hub) {
if (isset($file->headers['link'])) {
if ($file->headers['link'] !== '') {
$file->headers['link'] = ', ';
}
} else {
$file->headers['link'] = '';
}
$file->headers['link'] .= '<' . $hub . '>; rel=hub';
if ($self) {
$file->headers['link'] .= ', <' . $self . '>; rel=self';
}
}
}