/**
* Gets a flash variable and removes it from the variables
* available to the next request (though it will still be available
* for the remainder of the current request).
*
* If `$key` is NULL, gets the entire flash array.
*
* @param mixed variable to get (or NULL to get all)
* @param mixed default value
* @return mixed
*/
public static function get($key, $default = NULL)
{
isset(Flash::$config) or Flash::initialize();
if ($key !== NULL) {
// Remove this key from the session, so it won't appear on
// the next request and return the value
unset(Flash::$session[$key]);
return isset(Flash::$data[$key]) ? Flash::$data[$key] : $default;
} else {
Flash::$session = array();
return empty(Flash::$data) ? $default : Flash::$data;
}
}