Array's in classes

Hi Guys, I have written a class in which it uses the global command to get the value of a variable from outside of this class which I use within the class. I have recently changed this variable to an array and added 5 extra keys to this array. It is a string indexed array. In now seems as though PHP wont import the array. It is really weird though because if I access the key of an array such as $database["hostname"] is just echo's nothing at all to the browser. It also echo's nothing to the browser if I use $database[0]. But, if I echo just $database to the browser it returns "Array" ? Does anybody have any idea of why this is happening? Thanks Scott.