Setting up Instant Payment Notification (IPN) post("/group/callback/$group_id", array('callback_url'=>'http://progphp.com/cb.php')); print_r($cb); // Get a list of callbacks for a group $cbs = $W->get("/group/callback_list/$group_id"); print_r($cbs); ]]> get("/group/callback_list/$group_id"); if(count($cbs)) { $id = $cbs[0]->id; $result = $W->delete("/group/callback_delete/$id"); } $cb = $W->post("/group/callback/$group_id", array('callback_url'=>'http://progphp.com/cb.php')); print_r($cb); $cbs = $W->get("/group/callback_list/$group_id"); print_r($cbs); ]]>