Question

I have an array of arrays,

I have posted the essential structure below,
The recursion can be of any depth.

Anyway, what I want to do is, loop over every item in the array, and if it’s ['item']->data('id') value is equal to $id then remove that section of the tree,

But I am not sure as to the most efficient way of doing this?

I think this might work, but am I missing something?

function removeKey($key, &$categories){
    foreach($categories as $k => $category){
        if($category['item']->data('id') == $key){
            unset($categories[$k]);
            return;
        }
        if(!empty($category['children']))
            removeKey($key, $category['children']);
    }
}

removeKey($id, $categories);

---

array(
    array(
        'item' => "category Object", //use ->data('id') to get the id!
        'children' => array(
            array(
                'item' => "category Object",
                'children' => array(
                    array(
                        'item' => "category Object",
                        'children' => array()
                    )
                )
            ),
            array(
                'item' => "category Object",
                'children' => array(
                    array(
                        'item' => "category Object",
                        'children' => array()
                    )
                )
            )
        )
    ),
    array(
        'item' => "category Object",
        'children' => array(
            array(
                'item' => "category Object",
                'children' => array(
                    array(
                        'item' => "category Object",
                        'children' => array()
                    )
                )
            ),
            array(
                'item' => "category Object",
                'children' => array(
                    array(
                        'item' => "category Object",
                        'children' => array()
                    )
                )
            )
        )
    )
);

Answer 1

you can use either array_map or array_filter to traverse each child and unset the desired one.