I tried example 7, and at first I couldn't get it to work. It took me a while to spot that somewhere along the line, probably by the server, a seemingly random number was being added to the realm - so the valid_result variable wasn't calculated using the correct realm.
To get around this, or any similar problems, make the following changes to the example:
Around line 43 (44 if after next step ;) ):
$needed_parts = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1, 'uri'=>1, 'response'=>1, 'realm'=>1);
Before line 24:
$realm = $data['realm'];
These two steps get the real realm used for the authentication request, and substitute it into the "valid_response" query.
Hope this helps :)
