sort array by key

Hi,

What I want is simple, but I can't figure it out at the moment.

Let's say this is an array names $matches:

Array
(
[0] => Array
(
[teamid] => 137
[teamnaam] => Weet ik Veel ??
[speeldagid] => vr
[speeldagvolgnr] => 5
)

[1] => Array
(
[teamid] => 27
[teamnaam] => Tycoon
[speeldagid] => di
[speeldagvolgnr] => 2
)

[2] => Array
(
[teamid] => 36
[teamnaam] => Arabier 1
[speeldagid] => do
[speeldagvolgnr] => 4
)

[3] => Array
(
[teamid] => 105
[teamnaam] => Road Runners
[speeldagid] => do
[speeldagvolgnr] => 4
)
)

And I want to sort it on key 'speeldagvolgnr', how do I do this?
So I want the array back


Array
(
[0] => Array
(
[teamid] => 27
[teamnaam] => Tycoon
[speeldagid] => di
[speeldagvolgnr] => 2
)

[1] => Array
(
[teamid] => 36
[teamnaam] => Arabier 1
[speeldagid] => do
[speeldagvolgnr] => 4
)

[2] => Array
(
[teamid] => 105
[teamnaam] => Road Runners
[speeldagid] => do
[speeldagvolgnr] => 4
)
[3] => Array
(
[teamid] => 137
[teamnaam] => Weet ik Veel ??
[speeldagid] => vr
[speeldagvolgnr] => 5
)
)




I have looked at the sort functions at PHP.net, but could not find the
solution.

Can you help me out? Thanx.

Boefje wrote:
> I have looked at the sort functions at PHP.net, but could not find the
> solution.
>

You have missed usort():

function cmp($a, $b) {
if ($a['speeldagvolgnr'] == $b['speeldagvolgnr']) {
return 0;
}
return ($a['speeldagvolgnr'] < $b['speeldagvolgnr']) ? -1 : 1;
}

usort($matches, "cmp");


JW