adding in array

Hi all, I have a problem i know you can help me with. I have this flushet out from a loop command: Year: 2000 & ID: 14 & Value: 300 Year: 2002 & ID: 11 & Value: 640 Year: 2002 & ID: 10 & Value: 100 Year: 2003 & ID: 11 & Value: 200 Year: 2004 & ID: 11 & Value: 150 Year: 2005 & ID: 11 & Value: 250 I need PHP to put it into an array, but if it's the same YEAR the it's supposed to add the two values, so if i made a flush of the arrayt it would say somthing like: Array( [0] => Array ( [2000] => "300") [1] => Array( [2002] => "740" ) [2] => Array( [2003] => "200") [4] => Array( [2004] => "150") [5] => Array( [2005] => "250")) So here is the little plan, I only got the values in a variable in a loop, so i guess firstly putting it into an array could be a good idea, then add it and put it into an array again so i can flush the output, but i'm really bad at array (and english) so i really hope that you will help me. I hope you get it, Thanks A lot for your help !! BEST Regards, Martin Allan Jensen