First of all, thanks for developing and making phpFlickr available.

The examples given on phpFlickr home did not work at first. After some debugging I found that the problem was the proxy of the HTTP_Request package of PEAR not being set.
The simple fix was to add one line to function phpFlickr of phpFlickr.php:

function phpFlickr ($api_key, $secret = NULL, $die_on_error = true)
{
//The API Key must be set before any calls can be made. You can
//get your own at http://www.flickr.com/services/api/misc.api_keys.html
$this->api_key = $api_key;
$this->secret = $secret;
$this->die_on_error = $die_on_error;

//All calls to the API are done via the POST method using the PEAR::HTTP_Request package.
require_once 'HTTP/Request.php';
$this->req =& new HTTP_Request();
$this->req->setProxy( your_proxy_here, port_number_here );
$this->req->setMethod(HTTP_REQUEST_METHOD_POST);

//setup XML parser using Aaron Colflesh’s XML class.
$this->xml_parser = new xml(false, true, true);
}

I thought you may want to add a note to the readme to point this thing out.

Regards
Ugo