Er... I’m not sure exactly what you’re asking or trying to do. If you mean how and when to use the PHP $_GET and $_POST variables, then it depends...
The $_GET array consists of variables and values sent in the query string of the URL, whereas the $_POST array contains variables and values passed in most forms (see
http://www.php.net/manual/en/language.variables.predefined.php for more info).
Perhaps if you give us a bit more info as to what you’re trying to do one of us can point you in the right direction.
