this worked for me.. might be useful to someone...
// sort the array..
$current = 0; // we begin at the top
$totals = forum_count_values($r);
while ( $current < sizeof($r)) {
$c = $r[$current][FORUM_POST_FIELD_ID];
// count the number of posts that are replies to current.
$total = $totals[$c];
$j=0;
$i=$current + 1; // we start after current..
while (true) {
$id = $r[$i][FORUM_POST_FIELD_ID];
$p = $r[$i][FORUM_POST_FIELD_PARENT]; // set parent.
if ($p != $c) { // if parent not equal to current move to last
array_push($r, $r[$i]); // add a copy of element last
array_splice($r,$i,1); // remove the old element
}
else {
$j++; // if current and parent are equal move one step closer to total
$i++;
}
if ($j==$total) break;
}
$current++; // move to next position
} // end while
"Leif H�Gberg" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> I have an array where each element contains an array that in turn contains
> 2 numbers indexed by "id" and "parent".
>
> Every id except for the first one belongs to another, its parent.
>
> What I want to do now is sort the array so that every id is put after its
> parent starting with id 1.
>
> Example:
> arr1 = (
> 0 => array("id" => 1, "parent" => 0),
> 1 => array("id" => 2, "parent" => 1),
> 2 => array("id" => 3, "parent" => 1),
> 3 => array("id" => 4, "parent" => 2),
> 4 => array("id" => 5, "parent" => 3),
> 5 => array("id" => 6, "parent" => 2),
> 6 => array("id" => 7, "parent" => 1),
> 7 => array("id" => 8, "parent" => 4),
> 8 => array("id" => 9, "parent" => 5)
> )
>
> In other words they are in the following order..
> 1=0
> 2=1
> 3=1
> 4=2
> 5=3
> 6=2
> 7=1
> 8=4
> 9=5
>
> After the sort I want them to be in the following order..
> 1=0
> 2=1
> 4=2
> 8=4
> 6=2
> 3=1
> 5=3
> 9=5
> 7=1
>
> Note that id 6 isn't placed right after id 4 since id 4 has parents of its
> own which have precedence.
>
> An easier way to illustrate this would be by indenting the list..
>
>
>
> 1=0
> 2=1
> 4=2
> 8=4
> 6=2
> 3=1
> 5=3
> 9=5
> 7=1
>
>
> The index of $arr1 makes no difference so the array can be shifted or
> rebuilt..
>
> If you are wondering I need this for a forum that im building. If you have
> any suggestions as how to do this better feel free to tell me all about it
> :)
>
>
>
> Thanks in advance.
>
>
>
> // Leif H�gberg
>
>
>
>
>
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