I know a small bit of PHP, but have never programmed for Drupal (except basic modification of templates). I have a website written in Drupal 7 (Shinezar.com) and using the module "Classified ads". Our client now wants the visitors to be able to send an ad by SMS too, through a phone operator service receiving SMSs and transforming them into URIs aimed to be treated by PHP GET method. I don't know the details yet, but the URI will be something like this: "http://shinezar.com?ad=I sell a car for 5 000 000 MNT". We are free to decide the fix part of the URI, and the phone operator will generate the query part, add it to the fix part and visit that URI. Do you have an idea how I could get such an URI and send it to Classified ads? It seems to me that this is equivalent to the question: "How to transform a GET query into a POST one?".