looking at the typical harness for openid/yadis like the example here:
http://blog.paulisageek.com/2009/06/easy-openid-delegation-with-yadis.html
when using lightopenid you MUST add a secondary check to
if (strpos($_SERVER['HTTP_ACCEPT'], "application/xrds+xml") !== FALSE) {
when using the current implementation of
https://gitorious.org/lightopenid/lightopenid/blobs/master/openid.php
i.e.
if (strpos($_SERVER['HTTP_ACCEPT'], "application/xrds+xml") !== FALSE && !isset($_REQUEST['openid_mode']) {
the method "request_curl" adds 'Accept: application/xrds+xml, */*' regardless of the request method while "request_streams" DOES NOT add the header when the method is POST
"request_curl" should be corrected to
if($method != 'POST'){
curl_setopt($curl, CURLOPT_HTTPHEADER, array('Accept: application/xrds+xml, */*'));
}