Default argument values

Hey All, I've been trying to write a function that accepts multiple optional parameters, some of which are ints. The function signature looks like this: function blahBlah($fromDate, $toDate = 0, $limit = 20, $limitNodeType = null) I've been reading up here: http://www.php.net/manual/en/functions.arguments.php But it doesn't describe what to do with multiple optional arguments. Can I call the function like this: blahBlah($date, null, null, $limitNodeType); ? Need some help getting this language feature sorted. cheers, neko