Question

I’m trying to move array items into a sub-array based on a value, so for example:

Array
(
    [0] => Array
    (
        [Desc] => 'Sub category'
        [SubID] => null
    )
    [1] => Array
    (
        [Desc] => 'Listed item 1'
        [SubID] => 1
    )
    [2] => Array
    (
        [Desc] => 'Listed item 2'
        [SubID] => 1
    )
    [3] => Array
    (
        [Desc] => 'Item with no sub category'
        [SubID] => null
    )
) 

Would become:

Array
(
    [0] => Array
    (
        [Desc] => 'Sub category'
        [SubID] => null
        [SubSections] => Array
            (
                [Desc] => 'Listed item 1'
                [SubID] => 1
            )
            [2] => Array
            (
                [Desc] => 'Listed item 2'
                [SubID] => 1
            )
    )
    [3] => Array
    (
        [Desc] => 'Item with no sub category'
        [SubID] => null
    )
) 

Sorry to be vague, I’m unsure of the best way of describing it, but hopefully the example above makes sense.

Thanks!

Answer 1

<?
foreach($arr as $index=>$subArr){
  if($subArr['SubID']){
    $arr[$subArr['SubID']-1]['SubSections'][] = $subArr;
    unset($arr[$index]);
  }
}
?>

I think that this will do the work. Maybe some lite modification will be implied to