sort array by key

[Boefje]

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.

[Janwillem Borleffs]

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

[Janwillem Borleffs]

Boefje wrote:

Don't multipost (same question asked in alt.comp.lang.php in a seperate
thread)

> Indeed. Thanks.
>
> An example...
>

Did you test your example? Then you will have realised that your multi_sort
function doesn't work. The following will:

function multi_sort(&$array, $key) {
usort($array,
create_function(
'$a,$b',
'if ($a["'.$key.'"] == $b["'.$key.'"]) return 0;' .
'return ($a["'.$key.'"] < $b["'.$key.'"]) ? -1 : 1;'
)
);
}


JW

[fanonimus]

Janwillem Borleffs wrote:

> *Boefje wrote:
>
> Don't multipost (same question asked in alt.comp.lang.php in a
> seperate
> thread)
>

> > Indeed. Thanks.
> >
> > An example...
> >

>
> Did you test your example? Then you will have realised that your
> multi_sort
> function doesn't work. The following will:
>
> function multi_sort(&$array, $key) {
> usort($array,
> create_function(
> '$a,$b',
> 'if ($a["'.$key.'"] == $b["'.$key.'"]) return 0;' .
> 'return ($a["'.$key.'"] < $b["'.$key.'"]) ? -1 : 1;'
> )
> );
> }
>
>
> JW *

Hi!
Why the below example doesn't work?

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

uksort($tab,"cmp");

and the next example works very fine?

function multi_sort(&$array, $key) {
usort($array,
create_function(
'$a,$b',
'if ($a["'.$key.'"] == $b["'.$key.'"]) return 0;' .
'return ($a["'.$key.'"] < $b["'.$key.'"]) ? -1 : 1;'
)
);
}

multi_sort( $tab,"speeldagvolgnr");


Thanks very much for an explanation.
F



--
fanonimus
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[fanonimus]

fanonimus wrote:

> *Hi!
> Why the below example doesn't work?
>
> function cmp ($a, $b) {
> if ($a["speeldagvolgnr"] == $b["speeldagvolgnr"]) {
> return 0;
> }
> return ($a["speeldagvolgnr"] < $b["speeldagvolgnr"]) ? -1 : 1;
> }
>
> uksort($tab,"cmp");
>
> and the next example works very fine?
>
> function multi_sort(&$array, $key) {
> usort($array,
> create_function(
> '$a,$b',
> 'if ($a["'.$key.'"] == $b["'.$key.'"]) return 0;' .
> 'return ($a["'.$key.'"] < $b["'.$key.'"]) ? -1 : 1;'
> )
> );
> }
>
> multi_sort( $tab,"speeldagvolgnr");
>
>
> Thanks very much for an explanation.
> F *

Thanks



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fanonimus
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