MTGOX API - PHP - How to download history?

[twa]

I have a php script (based on the php authentication class) that successfully executes trades, gets info, and all but I can't figure out how to get the trade history.  Can anyone that has gotten this to work please give me a helping hand?

The call I am using is mtgox_query("0/history_USD.csv"); which is what is standard.  It seems though that the class may not be written to get the csv file since it acts like every API response is a JSON.