() '' Error: you must specify an api_key for Flickr. http://www.flickr.com/services/rest/?method= FLICKR: Error: you must specify an api_key for Flickr. f: ? if (exists($ )) then concat('& =', $ ) else '' $ != '' & = true() or exists($f:auth_token) $f:auth_token != '' &auth_token= &api_sig= method if (exists($ )) then concat(' ', $ ) else '' $ != ''