Question

How do a delete all array entries where status equals 0?

That means: $array[1][3]; and $array[4];

Array
(
    [1] => Array
        (
            [id] => 1
            [parent_id] => 0
            [status] => 2
            [title] => bananer
            [breadcrumb] => /bananer
            [slug] => /bananer
            [2] => Array
                (
                    [id] => 2
                    [parent_id] => 1
                    [status] => 2
                    [title] => sub bananer
                    [breadcrumb] => /bananer/sub bananer
                    [slug] => /bananer/sub-bananer
                )
            [3] => Array
                (
                    [id] => 3
                    [parent_id] => 1
                    [status] => 0
                    [title] => sub bananer 2
                    [breadcrumb] => /bananer/sub bananer 2
                    [slug] => /bananer/sub-bananer-2
                )
        )
    [4] => Array
        (
            [id] => 4
            [parent_id] => 0
            [status] => 0
            [title] => appelsin
            [breadcrumb] => /appelsin
            [slug] => /appelsin
            [5] => Array
                (
                    [id] => 5
                    [parent_id] => 4
                    [status] => 2
                    [title] => sub appelsin
                    [breadcrumb] => /appelsin/sub appelsin
                    [slug] => /appelsin/sub-appelsin
                )
            [6] => Array
                (
                    [id] => 6
                    [parent_id] => 4
                    [status] => 2
                    [title] => sub appelsin 2
                    [breadcrumb] => /appelsin/sub appelsin 2
                    [slug] => /appelsin/sub-appelsin-2
                )
        )
)

Answer 1

Try this:

function deleteIt(&$array)
{
    foreach($array as $key => &$value)
    {
        if (is_numeric($key)) deleteIt($value);
        if (isset($value['status']) && !$value['status']) unset($array[$key]);
    }
}

This runs through the array recursively while handing references down so that the original array is modified while deleting. Notice the & in the deleteIt function prototype and in the foreach.