sorting a multidimensional array via a key

[mkstanle]

Suppose i have an array of arrays... for example..

Array
(
    [0] => Array
        (
            [first_name] => John
            [id] => 3
            [last_name] => Smith
        )

[1] => Array
    (
        [first_name] => Jack
        [id] => 52
        [last_name] => Goo
    )

[2] => Array
    (
        [first_name] => Carl
        [id] => 5
        [last_name] => Lenny
    )

)

I need to be able to sort the array be various keys... i.e. last_name, or id...

i.e. if ordered by id... above array or arrays would be [0], [2], [1]... know what i mean?

I'd apreciate any help,

thanks,
~Matt

[toma42]

http://www.php.net/manual/en/function.usort.php

look into all the See Also functions on that page for other options.