sorting matrix

Hy, I have a matrix with strings ex. 4 cols and many rows how could I sort the matrix after the 2nd field with maintaining the indexes order Like in a table name surname age address.. i have many records and i'd like to print the records in age order ascendent or after the surname order... it's not a result from a query..just a simple matrix with strings and numbers... i've tried "asort" function like: asort($matrix[1],SORT_STRING) but it doesn't work... thanks a lot... cybercop78 PS :if there are "friends" from romania and know well programming in php please send me a reply in order to "combine our powers" or to make useful things or projects....i'm not a "newbie" and i don't want to colaborate with "newbies"...thanks http://www.idilis.ro - Stiri, e-mail gratuit, download, SMS, server de counter-strike, hosting gratuit, servicii internet... Fii cu un pas inaintea celorlati!