How to sort a Multidimensional array?

Hi, i have a multidimensional array that look like this: $arr=array($key=>array('item0key'=>'item0', 'item1key'=>'item1', 'item2key'=>'item2', 'item3key'=>'item3', 'item4key'=>'item4')); Lineview: 0 item0key = item0 item1key = item1 item2key = item2 item3key = item3 item4key = item4 1 item0key = item0 item1key = item1 item2key = item2 item3key = item3 item4key = item4 2 item0key = item0 item1key = item1 item2key = item2 item3key = item3 item4key = item4 4 item0key = item0 item1key = item1 item2key = item2 item3key = item3 item4key = item4 How can I sort such an array, depending on the Userentry by the Item values? Thank you very much Mirco Blitz