public static function sendHeaders()
{
global $REX;
// frontend
if (!$REX['REDAXO']) {
// set noindex header for robots if current article has noindex flag
if (seo42::isArticleValid() && seo42::hasNoIndexFlag()) {
header('X-Robots-Tag: noindex, noarchive');
}
// try fixing redaxo's errorarticle behaviour
if (seo42::has404ResponseFlag() && $REX['START_ARTICLE_ID'] == $REX['NOTFOUND_ARTICLE_ID']) {
header("HTTP/1.0 404 Not Found");
}
}
}
