$hmac_sig = hash_hmac("sha1", $params, $rr['secret']);
$headers = array("Content-type: application/atom+xml",
sprintf("Link: <%s>;rel=hub,<%s>;rel=self",
$hmac_sig = hash_hmac("sha1", $params, $rr['secret']);
$headers = array("Content-type: application/atom+xml",
sprintf("Link: <%s>;rel=hub,<%s>;rel=self",